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Sea Tel, Inc.4030 Nelson AvenueConcord, CA 94520Tel: (925) 798-7979Fax: (925) 798-7986Email: [email protected]: www.seatel.com Look to the Leader. Look to Sea Tel.

Sea Tel EuropeUnit 1, Orion Industrial CentreWide Lane, SwaythlingSouthampton, UK S0 18 2HJTel: 44 (0)23 80 671155Fax: 44 (0)23 80 671166Email: [email protected]: www.seatel.com

July 10, 2006 Document. No. 122650Revision D

INSTALLATION AND OPERATION MANUALFOR SEA TEL MODEL

DAC-2200 ANTENNA CONTROL UNIT

WARNING: Antenna Pedestal must be properly restrained (stowed)to prevent damage to wire rope isolators, isolator springs and/orantenna pedestal mechanism during underway conditions when poweris removed from the antenna assembly.

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Sea Tel Marine Stabilized Antenna systems are manufactured in the UnitedStates of America.

Sea Tel is an ISO 9001:2000 registered company. Certificate Number 19.2867 wasissued August 12, 2005. Sea Tel was originally registered on November 09, 1998.

The DAC-2200 Antenna Control Unit (exclusively for use with Sea Tel MarineStabilized Antenna Pedestals) complies with the requirements of European Normsand European Standards EN 60945 (1997) and prETS 300 339 (1998-03). Sea TelEuropean Union Declaration of Conformity for this equipment is contained in thismanual.

Copyright Notice

All Rights Reserved. The information contained in this document is proprietary to Sea Tel, Inc.. Thisdocument may not be reproduced or distributed in any form without the consent of Sea Tel, Inc. Theinformation in this document is subject to change without notice.

Copyright © 2005 Sea Tel, Inc.

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Revision History

REV ECO# Date Description ByX1 N/A 3/26/04 Initial PRELIMINARY Release MDNA N/A September 20, 2004 Updated Text & Drawings for Production release MDNB N/A October 12, 2004 Updated Tex & Drawings MDNC N/A October 10, 2005 Updated text & drawings. Added FCC TX Mute compliance

installation and testing informationMDN

D N/A July 5, 2006 Update text and Drawings MDN

DAC-2200 Antenna Control Unit

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1. INTRODUCTION .................................................................................................................................1-11.1. GENERAL DESCRIPTION OF SYSTEM.................................................................................................1-11.2. GENERAL SCOPE OF THIS MANUAL....................................................................................................1-11.3. QUICK OVERVIEW OF CONTENTS......................................................................................................1-1

2. OPERATION........................................................................................................................................2-12.1. QUICK START OPERATION ...............................................................................................................2-12.2. FRONT PANEL LAYOUT ....................................................................................................................2-22.3. BASIC FUNCTION OF FRONT PANEL KEYS.........................................................................................2-22.4. BASIC DESCRIPTION OF FRONT PANEL STATUS LEDS ......................................................................2-42.5. DISPLAY & ENTRY OPERATION MENUS.............................................................................................2-5

2.5.1. Ship information menus....................................................................................................2-62.5.2. SAT information menus....................................................................................................2-82.5.3. ANTENNA information menus........................................................................................2-122.5.4. Status information menus...............................................................................................2-152.5.5. SETUP Parameter display and entry menus. ................................................................2-18

2.6. TRACKING OPERATION ..................................................................................................................2-182.6.1. DishScan Operation .......................................................................................................2-182.6.2. Internal Tracking Receiver settings................................................................................2-182.6.3. C/X and Ku Band Selections ..........................................................................................2-18

2.7. SEARCHING OPERATION ................................................................................................................2-192.8. AUTO-POLARIZATION OPERATION ..................................................................................................2-192.9. RADOME ASSEMBLY OPERATION....................................................................................................2-19

3. BASIC SYSTEM INFORMATION .......................................................................................................3-13.1. SATELLITE BASICS...........................................................................................................................3-1

3.1.1. Frequencies .....................................................................................................................3-13.1.2. Signal level .......................................................................................................................3-13.1.3. Satellite Footprints............................................................................................................3-23.1.4. Satellite Polarization.........................................................................................................3-2

3.2. ANTENNA BASICS ............................................................................................................................3-23.2.1. Azimuth ............................................................................................................................3-23.2.2. Elevation...........................................................................................................................3-33.2.3. Antenna polarization.........................................................................................................3-33.2.4. Stabilization ......................................................................................................................3-33.2.5. Tracking Receivers ..........................................................................................................3-43.2.6. Tracking ...........................................................................................................................3-43.2.7. Unwrap vs Unlimited Azimuth ..........................................................................................3-4

3.3. COMPONENTS OF THE SYSTEM CONFIGURATION...............................................................................3-43.3.1. Antenna ADE Assembly ...................................................................................................3-53.3.2. Antenna Control Unit ........................................................................................................3-53.3.3. TSC-10 Touch Screen Controller (OPTIONAL) ...............................................................3-53.3.4. Power Supply ...................................................................................................................3-5

4. INSTALLATION...................................................................................................................................4-14.1. GENERAL CAUTIONS & WARNINGS ..................................................................................................4-14.2. SITE SURVEY ..................................................................................................................................4-14.3. PREPARING FOR THE INSTALLATION.................................................................................................4-1


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4.3.1. Unpack Shipping Crates and Inspect / Inventory .............................................................4-14.3.2. Preparing BDE Location...................................................................................................4-14.3.3. Read the Installation Information......................................................................................4-14.3.4. Plan The Install.................................................................................................................4-24.3.5. The Installing Cables........................................................................................................4-2

4.4. INSTALL THE ACU ...........................................................................................................................4-24.5. INSTALL THE TERMINAL MOUNTING STRIP (TMS)..............................................................................4-24.6. INSTALL THE BASE MULTIPLEXER PANEL ..........................................................................................4-24.7. TERMINAL MOUNTING STRIP (TMS) CONNECTIONS ..........................................................................4-24.8. AC POWER TO THE ACU................................................................................................................4-44.9. AGC TRACKING CONNECTION .........................................................................................................4-44.10. MONITOR AND CONTROL CONNECTIONS .......................................................................................4-44.11. INSTALL OTHER BDE EQUIPMENT.................................................................................................4-54.12. FINAL CHECKS .............................................................................................................................4-5

4.12.1. Visual inspection ..............................................................................................................4-54.12.2. Electrical - Double check wiring connections ...................................................................4-5

4.13. POWER-UP..................................................................................................................................4-54.14. SETUP .........................................................................................................................................4-5

5. SETUP.................................................................................................................................................5-15.1. OPERATOR SETTINGS......................................................................................................................5-15.2. DEFAULT SETUP PARAMETERS FOR YOUR ANTENNA ........................................................................5-15.3. SETUP PARAMETER DISPLAY AND ENTRY MENUS.............................................................................5-15.4. EL TRIM ........................................................................................................................................5-65.5. AZ TRIM........................................................................................................................................5-65.6. AUTO THRES ...............................................................................................................................5-65.7. EL STEP SIZE...............................................................................................................................5-75.8. AZ STEP SIZE ..............................................................................................................................5-75.9. STEP INTEGRAL..........................................................................................................................5-75.10. SEARCH INC.............................................................................................................................5-75.11. SEARCH LIMIT ..........................................................................................................................5-85.12. SEARCH DELAY .......................................................................................................................5-85.13. SYSTEM TYPE..........................................................................................................................5-85.14. GYRO TYPE ..............................................................................................................................5-95.15. POLANG TYPE..........................................................................................................................5-95.16. POL OFFSET.............................................................................................................................5-95.17. POL SCALE ...............................................................................................................................5-95.18. RADIATION HAZARD AND BLOCKAGE MAPPING (AZ LIMIT PARAMETERS) .....................................5-105.19. AZ LIMIT 2 ...............................................................................................................................5-115.20. 5V OFFSET (NOT IN CURRENT SOFTWARE) ...............................................................................5-115.21. 5V SCALE (NOT IN CURRENT SOFTWARE)..................................................................................5-125.22. TX POLARITY (NOT USED IN TVRO SYSTEMS) ............................................................................5-125.23. SAVE NEW PARAMETERS ....................................................................................................5-125.24. REMOTE COMMAND..............................................................................................................5-125.25. REMOTE MONITOR................................................................................................................5-125.26. REMOTE TILT .........................................................................................................................5-125.27. REMOTE PARAMETERS........................................................................................................5-12


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5.28. REMOTE UPLOAD..................................................................................................................5-126. FUNCTIONAL TESTING.....................................................................................................................6-1

6.1. (OPTIONAL) TSC-10 TOUCH SCREEN CONTROLLER CHECKS ......................................................6-16.2. ACU / ANTENNA SYSTEM CHECK.....................................................................................................6-16.3. LATITUDE/LONGITUDE AUTO-UPDATE CHECK....................................................................................6-16.4. SHIP HEADING – GYRO COMPASS FOLLOWING CHECK .....................................................................6-16.5. AZIMUTH & ELEVATION DRIVE..........................................................................................................6-26.6. FOUR QUADRANT TRACKING TEST...................................................................................................6-26.7. BLOCKAGE CONDITION TEST ...........................................................................................................6-36.8. CHECK ACU PARAMETERS..............................................................................................................6-3

7. MAINTENANCE & TROUBLESHOOTING.........................................................................................7-17.1. GENERAL CAUTIONS & WARNINGS ..................................................................................................7-17.2. TROUBLESHOOTING THE ACU .........................................................................................................7-1

7.2.1. DAC-2200 display is blank ...............................................................................................7-17.2.2. DAC-2200 Status displays "REMOTE NOT RESPONDING" ..........................................7-2

7.3. TROUBLESHOOTING SHIPS GYRO COMPASS PROBLEMS....................................................................7-27.3.1. STEP-BY-STEP ...............................................................................................................7-27.3.2. 1:1 SYNCHRO .................................................................................................................7-27.3.3. 360:1 Synchro ..................................................................................................................7-3

7.4. DISPLAY OFFSETS / OPTIMIZING TARGETING....................................................................................7-37.5. PEDESTAL CONTROL UNIT CONFIGURATION .....................................................................................7-4

8. TECHNICAL SPECIFICATIONS.........................................................................................................8-18.1. DAC-2200 ANTENNA CONTROL UNIT...............................................................................................8-1

8.1.1. General.............................................................................................................................8-18.1.2. Front Panel.......................................................................................................................8-18.1.3. Rear Panel .......................................................................................................................8-18.1.4. J4 “Antenna” Pedestal Interface.......................................................................................8-18.1.5. J3 “M&C” Aux Serial Interface for TSC-10 Touchscreen Control Panel ..........................8-28.1.6. J2 “NMEA” Interface.........................................................................................................8-28.1.7. DVB Compliant Tracking Receiver...................................................................................8-2

8.2. TSC-10 TOUCH SCREEN CONTROL PANEL (OPTIONAL)....................................................................8-28.3. TERMINAL MOUNTING STRIP ............................................................................................................8-3

8.3.1. Synchro Interface: ............................................................................................................8-38.3.2. SBS Interface ...................................................................................................................8-38.3.3. Control Interface...............................................................................................................8-38.3.4. NMEA Interface................................................................................................................8-3

8.4. ENVIRONMENTAL CONDITIONS .........................................................................................................8-48.5. CABLES ..........................................................................................................................................8-4

8.5.1. DAC-2200 AC Power Cable.............................................................................................8-48.5.2. Antenna Control Cable .....................................................................................................8-48.5.3. IF Signal Cables ...............................................................................................................8-48.5.4. SBS/Synchro Gyro Compass Interface Cable (Customer Furnished) .............................8-48.5.5. Audio / Video cables.........................................................................................................8-4

9. DRAWINGS.........................................................................................................................................9-19.1. DAC2200 ANTENNA CONTROL UNIT DRAWINGS ..............................................................................9-1


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DAC-2200 Antenna Control Unit Introduction

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DAC-2200 Antenna Control Unit Introduction

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1. IntroductionThis manual describes the Sea Tel Model DAC-2200 shipboard Tracking Antenna Control Unit (ACU). Systeminformation, installation, setup, operating instructions, functional testing and maintenance for the ACU are alsocontained herein.

This ACU allows you to control the antenna that it is connected to. It also allows you to connect your GyroCompass to provide heading input to the system for accurate targeting of satellites.

1.1. General Description of systemThe DAC-2200 ACU has been designed and manufactured so as to be inherently reliable, easy to maintain,and simple to operate. Except for start-ups, or when changing to operate with different transponders orsatellites, the equipment essentially permits unattended operation.

The DAC-2200 is housed in a standard 19-inch rack mount enclosure. The front panel contains function keysused to select the desired information to be displayed, and/or changed. Data is displayed on a 2 line 20character display. All external connections are brought out through connectors mounted on the rear panel.Two flexible ribbon cable connections to a terminal-mounting strip mounted on the rear of the rack enclosureseparating the ship wiring from the Antenna Control Unit.

The shipboard gyrocompass input is used as the long-term azimuth reference. The ACU accepts gyrocompass input from Step-By-Step OR 1:1, 36:1, 90:1 or 360:1 Synchro OR NMEA serial interface. A GPSantenna is provided on, or with, your antenna pedestal to provide Latitude and Longitude input to the system.

The DAC-2200 automatically calculates the Elevation, Azimuth and Polarization pointing angles based on theships Latitude, Longitude and the desired Satellite Longitude position. A programmable pattern search willautomatically scan the area for a desired satellite if no signal is found. These two features make locating anew satellite very easy.

The DAC-2200 requires satellite signal input to its internal Satellite ID Tracking Receiver to keep the antennapeaked on satellite. This internal receiver is a DVB compliant DSS compatible Satellite Identification receiver.Its input allows full coverage wide L-Band (950 to 2150 MHz) for tracking video transponders in all TVROsatellites and may be set to Single Channel Per Carrier (SCPC), or Narrow Band IF (NBIF) mode to allowtracking an L-BAND satellite beacon or narrow band data carrier.

This Antenna Control Unit will be connected to an Antenna and other equipment to form a system. Thesystem consists of two major groups of equipment; an Above-Decks Equipment (ADE) group and a Below-Decks Equipment (BDE) group. All equipment comprising the Above Decks is incorporated inside theradome assembly and is integrated into a single operational entity. The ACU is a major part of the BelowDecks group. Refer to your antenna manual for more information about your system.

1.2. General scope of this manualThis manual describes the Sea Tel Model DAC-2200 Antenna Control Unit, its’ operation and installation.Refer to the manual provided with your Shipboard Satellite TV Receive-Only Antenna and/or the TSC-10Touch Screen Controller for installation and operating instructions for those equipments.

1.3. Quick Overview of contentsThe information in this manual is organized into chapters. Operation, basic system information, installation,setup, functional testing, maintenance, specifications and drawings relating to this DAC-2200 are allcontained in this manual

Introduction DAC-2200 Antenna Control Unit

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DAC-2200 Antenna Control Unit Operation

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2. OperationOperation of your system is accomplished from the Antenna Control Unit (ACU) OR from the optional TSC-10Touch Screen Controller. If your system includes the TSC-10 Touch Screen Controller, refer to theoperation section of that manual. There is no Operation of the Radome or Antenna Pedestal, other than fromthe ACU.

When power is turned ON, the ACU Display will initially show “SEA TEL INC - MASTER” and the ACU softwareversion (ie DAC-2200 VER 5.00 ). 10 seconds later, the display will switch to “SEA TEL INC - REMOTE” and“REMOTE INITIALIZING”, until the Pedestal Control Unit (PCU) completes initialization of the antenna pedestal.When initialization is completed the PCU will report its Model & Software version (ie 4004 VER 2.10L ).Initialization takes approximately two minutes.

2.1. Quick Start OperationIf your system has been set up correctly, is using factory default parameters and the ship has not movedsince the system was used last … Quick start operation of the system from a cold start involves the followingsteps.

1 Turn on the AC power switches for the Antenna Control Unit (ACU) and other Below DecksEquipment.

2 Press NEXT until the Ship menu is displayed to check the Latitude, Longitude and Heading values.Latitude and Longitude should still be correct, but may be updated if necessary. Heading in mostcases will be 000.0 and you will have to enter the initial value of the ships current heading. Entry ofships heading is not required when your system is connected to a 1:1 Synchro or NMEA 0183Heading Gyro Compass output. Press ENTER 3 times to select ship's heading (HDG) entry mode.Use the LEFT arrow to bring the cursor up under the ones digit, then if desired, increment/decrementit using the UP/DOWN arrow keys. Use the LEFT/RIGHT arrow keys to select other digits to modifyand the UP/DOWN arrow key to modify them as needed to enter the current ships gyro heading.Press ENTER to save the value. Press NEXT to return to the Ship display menu.

3 Press NEXT to the Satellite display menu to target the satellite. If you are targeting the SAMEsatellite longitude as was used last; Press ENTER, then the LEFT (or RIGHT) arrow and thenENTER to target the same satellite. If you are targeting a different satellite you will need to changethe tracking receiver settings and then target the desired satellite, refer to the operation section for theSatellite menu below.

A. If no signal is found: The Tracking LED will flash for a short period of time (per the SEARCH DELAYparameter) followed by the Search LED coming ON. The ACU will automatically set the tracking thresholdand move the antenna in a spiral SEARCH pattern. The search movement will stop when the ACUreceives a signal (AGC) value that is greater than the threshold value. Tracking will take over (TrackingLED ON) and automatically peak the antenna position for highest receive signal level from the satellitewhich has been acquired.

B. If a satellite signal is found: The received signal level (AGC) will rise very rapidly to a value that isgreater than the threshold value. Tracking will take over (Tracking LED ON) when AGC exceedsthreshold and automatically peak the antenna position for highest receive signal level from the satellitewhich has been acquired.

Upon completion of the above, the system will continue to operate automatically indefinitely until: ACpower to the system is interrupted OR The satellite signal is blocked OR The ship sails into an area ofinsufficient satellite signal level.

Operation DAC-2200 Antenna Control Unit

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2.2. Front Panel Layout

2.3. Basic Function of Front Panel KeysKeyboard operation is very simple and straightforward. Basic function of each keys is:

Press NEXT to sequence through the four main menus; Ship, Satellite, Antenna andStatus (refer to the Operation Flowcharts).

Ship - Accesses the Ship menus to display, enter or edit current Ships’Latitude, Longitude and gyro compass Heading information.

Satellite - Accesses the Satellite menus to display, enter or edit currentSatellite Longitude, Threshold, Satellite ID Tracking Receiver settings,Network ID and current signal level being received (AGC).

Antenna - Accesses the Antenna menus to display, enter or edit currentAzimuth, Elevation & Relative antenna position and Polarization setting.Current signal level being received (AGC) and Conscan tracking signals arealso displayed in some of the sub-menu screens.

Status - Accesses control of Tracking Band & ON/OFF selection, SearchingON/OFF selection, Error status and Remote Auxiliary value.

Press Track to toggle the state of Tracking, ON/OFF.

In the Antenna Main menu display, press LEFT arrow to move the antenna left (CCWor AZ down) or the RIGHT arrow to move the antenna right (CW or AZ up).

In a sub-menu display, press LEFT or RIGHT to enter editing mode. This brings upthe cursor under the character to the left (or least significant bit) or right of the decimalpoint. Press the LEFT/RIGHT arrow key to move the cursor Left or Right to select acharacter to edit. When the cursor is under a character, it is selected and can bechanged.

In the Status – Tracking window, LEFT or RIGHT sequences through the TrackingBand selection choices.

(Setup) - Press BOTH the LEFT and RIGHT arrow keys to access the setupparameters (refer to the Setup section of this manual).


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In the Antenna Main menu display, press UP arrow to move the antenna up (EL up) orthe DOWN arrow to move the antenna down (EL down).

Press the UP/DOWN arrow keys to move vertically Up and Down through the sub-menus.

When a sub-menu item is being edited, use the UP/DOWN to increment/decrementthe selected character. This steps the selected entry one increment per sequentialkey-press or rapidly increments the selected entry when pressed & held.

In the Status – Tracking window, UP toggles Tracking ON/OFF. In the Status –Search window, UP turns Search ON, DOWN turns Search OFF. In the Status – Errorwindow, UP or DOWN clears the Error display.

At a main menu level, press ENTER to access the sub-menu items.

When viewing one of the sub-menus, pressing the ENTER key will step down throughthe sub-menu items, like the DOWN arrow does.

When editing, the cursor is visible under a character in a sub-menu (whether it hasbeen changed or not), press ENTER to execute the present value, and return todisplay mode of that sub-menu. This does NOT save the new value to NVRAM.

Press RESET to reset the processors in the Antenna Control Unit. This also reads allsettings & parameters from NVRAM for system use.


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2.4. Basic Description of Front Panel Status LEDsThe basic description of the front panel LED states are:

Tracking - (Green LED)

ON indicates that the ACU is Tracking a satellite signal whose AGC value is greater than the Thresholdvalue AND contains the desired Network ID. The ACU is actively issuing small azimuth & elevationposition adjustments to the antenna to optimize the signal level (AGC). If the system was Searching, theSEARCH LED will go OFF when the TRACKING LED turns ON.

Blinking indicates that the satellite signal AGC value is less than the Threshold value, OR is not thedesired Network ID. The ACU is counting down (the number of seconds specified in the “SEARCHDELAY” parameter). If the AGC does not rise above the Threshold before the count-down is completed,the ACU will automatically start, or continue, a SEARCH to acquire a signal that is greater than ThresholdAND contains the desired NID. When the SEARCH LED is ON, the TRACKING LED will be OFF.

OFF indicates that Tracking is OFF. This may be due to the operator turning Tracking OFF intentionallyor that Tracking was pre-empted by SEARCH.

Searching - (Yellow LED)

ON indicates that the ACU is Searching for a satellite signal whose AGC value is greater than theThreshold value and whose NID matches the save value. When a satellite signal is found, the SEARCHLED will go OFF and the TRACKING LED will come ON. If an adequate satellite signal is not found duringthe Search, the SEARCH LED will blink as the antenna re-targets to the desired satellite. If an adequatesatellite signal is still not found, then the TRACKING LED will begin flashing (count-down) until the nextSEARCH is automatically started.

OFF indicates that SEARCH is OFF. This may be due to the operator turning Search OFF intentionally orthat Tracking has pre-empted SEARCH.

Target - (Yellow LED)

ON indicates that the antenna is TARGETING to the calculated Azimuth & Elevation positions of thedesired satellite (SAT). When the antenna arrives at the calculated position the TARGET LED will goOFF. If an adequate satellite signal is found at the targeted position Tracking will commence. If anadequate satellite signal is not found at the targeted position, the TRACKING will begin blinking (seeabove) until the next SEARCH is automatically started.

ON also indicates UNWRAP - Your system will automatically “unwrap” to wind/unwind the cables inthe antenna. The need to “unwrap” the antenna is based on how far the ship has turned in one directionor the other. The satellite signal will be lost while the UNWRAP LED is ON. The system will normallyreacquire the satellite automatically when UNWRAP has completed (less than 2 minutes).

Power - (Green LED)

ON indicates that the Antenna Control Unit is energized.

Initializing - (Green LED)

ON indicates that the Antenna is initializing. Initialization of the antenna will take approximately twominutes.

Blinking - After initialization of the antenna, a 1 second “heartbeat” will be observed indicating thatSTATUS of the ACU & Antenna is normal (no errors or failures).

Error - (Red LED)

ON indicates that one, or more, discrete system errors have occurred. Refer to Status – Error Codeinformation menu to determine which error(s) have occurred.

OFF indicates that no errors have occurred.


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2.5. Display & Entry Operation MenusThe operation menus are arranged in four groups. Use the NEXT key to cycle through the groups, use theENTER key to access the sub-menu of a selected group and then use the UP/DOWN arrow keys to move upand down the sub-menu items.

In the following sections, the individual Operation menus containing explanatory text are followed by thatOperation menu in flowchart form.


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2.5.1. Ship information menus.

Display MeaningLAT 38 N LON 122 W

HDG 000.0 000.0Press the NEXT key until the Ship menu is displayed. This is the display ofthe current Ship information.

LAT 38.0 N Press ENTER to begin edit mode and access the Latitude sub-menu.Latitude is used to calculate Azimuth, Elevation and Polarization for thedesired satellite position. Latitude is updated automatically by the GPSmounted on the pedestal.

LON 122.0 W Press DOWN or ENTER to access the Longitude entry mode.Longitude is used to calculate Azimuth, Elevation and Polarization for thedesired satellite position. Longitude is updated automatically by the GPSmounted on the pedestal.

HDG 000.0 000.0Press DOWN or ENTER to access the Heading entry mode. Heading isused to provide “True” Azimuth antenna position. This must be True northinput, NOT Magnetic north.If the GYRO TYPE parameter is NMEA0183 data or 1:1 Synchro, you will notbe able to set HDG to any other value than it receives from the Ships GyroCompass. For all other acceptable Gyro Compass input types the HDGMUST be initially set whenever the ACU power is turned ON.To manually update, press the LEFT or RIGHT arrow key to bring the cursorup under the character to the left, or right, of the decimal point respectively.Continue to move the cursor until the desired character to be edited isunderscored (selected). Use the UP or DOWN arrow keys to increment ordecrement the selected character.HDG display may be a single value, or left and right values depending on theGYRO TYPE parameter. When Left and right values are displayed, left is theresponse from the pedestal and right is the local input from the gyrocompass.During subsequent normal operation, the HDG value should automaticallyfollow the Ships Gyro Compass correctly (HDG value should agree with thevalue observed on the Gyro Compass).Press ENTER to set the new heading value and return to heading displayOR Press NEXT to abort and return to the main Ship display

LAT 38 N LON 122 WHDG 000.0 000.0

LAT 38.0 N

LON 122.0 W

HDG 000.0 000.0

Ship

Use the LEFT and RIGHT arrow keys to bringup, and move, the cursor to select acharacter.. Use the UP or DOWN arrow keysto increment or decrement the selectedcharacter to the desired value.

To SAVE &Execute.

To EXIT

From Status Display on Page 4

To Satellite Display on Page 2

DAC-2200 Operation Flowchart - Page 1 - SHIP Menu

OR

OR


To SAVE &Execute.

To EXIT


To SAVE &Execute.

To EXIT

OR


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2.5.2. SAT information menus.

Display MeaningSAT 101 W THRS 1234

FREQ 1100 NID 1234Press the NEXT key until the main Satellite menu is displayed. This is thedisplay of the current Satellite information.NID value displayed is the Network ID which is currently being receivedfrom the satellite that the antenna is pointed to.

SAT 101.0 W Press ENTER to begin edit mode and access the Satellite Longitude entrymenu. Satellite longitude is used to calculate antenna Elevation, Azimuthand Polarity pointing angles.To manually update, press the LEFT or RIGHT arrow key to bring the cursorup under the tenths digit to the left, or the E/W character to the rightrespectively. Continue to move the cursor until the desired character to beedited is underscored (selected). Use the UP or DOWN arrow keys toincrement or decrement the selected character.Range of acceptable latitude values is 000.0 East to 180.0 East/West to000.0 West, however longitude may be entered as 000.0-359.9 East if youprefer (181.0 East is the same as 179.0 West). Tenths may be entered (andwill be used internally) but the main Ship display will round off to nearestwhole degree.When the hemisphere character is selected press the UP or the DOWN keyto toggle East/West hemisphere.Press ENTER to set the new longitude and return to longitude display. TheACU will then calculate the Elevation, Azimuth and Polarization that theantenna will be driven to, based on the current SHIP information (LAT, LON& HDG) and issue those (AZ, EL & POL) targeting values to the antenna.Auto-Threshold will re-set as the antenna targets.OR Press NEXT to abort and return to the main Satellite display.

THRS 1234 Press DOWN or ENTER to access the Threshold entry mode. Defaultsetup is Automatic Threshold, which sets the Threshold value to 100 countsof AGC above the average “off satellite” AGC value whenever the ACUSearches, Targets or Unwraps.To change the Automatic Threshold value OR to manually set threshold,refer to the Setup section of this manual.


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In DVB Mode

FREQ 1100 AGC 1234

In SCPC Mode

MHz 1111 AGC 1234

Press DOWN or ENTER to access the Sat ID Receiver Frequency entrymode. The individual settings of the Satellite Identification tracking receiverand the current signal level (AGC) will be displayed in each of the sub-menus below.In DVB Mode: FREQ #### AGC 1234In SCPC Mode: MHz #### AGC 1234To manually set, press the LEFT or RIGHT arrow key to bring the cursor upunder the character to the left, or right, of the decimal point respectively.Continue to move the cursor until the desired character to be edited isunderscored (selected). Use the UP or DOWN arrow keys to increment ordecrement the selected character.Range of FREQ/MHz is the L-Band Intermediate Frequency (950-2150MHz). To calculate the IF, subtract your Local Oscillator frequency (LO) ofthe LNB you have currently installed from the RF frequency of the satellitesignal you want to track. [ IF = RF – LO ]Set Frequency to 0000 to select External AGC mode. This will read inputfrom X1 & X2 terminals on the Terminal Mounting Strip.Press ENTER to tune the receiver to this frequency and return to thefrequency display OR Press NEXT to abort and return to the main Satellitedisplay.

In DVB Mode

Baud 20000 AGC 1234

In SCPC Mode

KHz 0999 AGC 1234

Press DOWN or ENTER to access the Sat ID Receiver Baud entry mode.This is used to input the numeric value of Baud Rate (symbol rate) OR of theKHz value of the desired the Intermediate Frequency (950-2150) you want touse for Tracking. This setting of the Satellite Identification tracking receiverand the current signal level (AGC) will be displayed.In DVB Mode: BAUD 20000 AGC 1234In SCPC Mode: KHz #### AGC 1234To manually update, press the LEFT or RIGHT arrow key to bring the cursorup under the character to the left, or right, of the decimal point respectively.Continue to move the cursor until the desired character to be edited isunderscored (selected). Use the UP or DOWN arrow keys to increment ordecrement the selected character.Current receivers can be set to any desired Baud Rate between 3000 and30000 OR the KHz value of the desired L-Band frequency, you want to usefor Tracking.Press ENTER to set the desired Baud/KHz and return to the Baud/KHzdisplay OR Press NEXT to abort and return to the main Satellite display.

Tone OFF AGC 1234Press DOWN or ENTER to access the Tone OFF AGC 1234. This settingis used to turn the 22 KHz Tone output on the rear panel “F” connectorON/OFF, this selects Hi/Low band from tone controlled matrix switches.To manually update, press the LEFT or RIGHT arrow key to bring the cursorup under the character to the left, or right, of the decimal point respectively.Continue to move the cursor until the desired character to be edited isunderscored (selected). Use the UP or DOWN arrow keys to scroll throughthe choices.ON is used to select High Band frequencies and OFF is used to select LowBand frequencies from the matrix switch.Press ENTER to set the desired tone setting and return to the Tone displayOR Press NEXT to abort and return to the main Satellite display.


2-10

Volt HORZ AGC 1234Press DOWN or ENTER to access the Volt HORZ AGC 1234. This settingis used to select Voltage output on the rear panel “F” connector.To manually update, press the LEFT or RIGHT arrow key to bring the cursorup under the character to the left, or right, of the decimal point respectively.Continue to move the cursor until the desired character to be edited isunderscored (selected). Use the UP or DOWN arrow keys to scroll throughthe choices.Selections are; HORZ (18VDC), LHCP (18VDC), VERT (12VDC) or RHCP(12VDC).Press ENTER to set the desired Voltage setting and return to the Voltagedisplay OR Press NEXT to abort and return to the main Satellite display.

FEC AUTO AGC 1234Press DOWN or ENTER to access the FEC AUTO AGC 1234. Thissetting is used to select the FEC rate for the desired tracking signal. Defaultsetting (AUTO) automatically scans through all the standard DVB & DSSFEC rates.To manually update, press the LEFT or RIGHT arrow key to bring the cursorup under the character to the left, or right, of the decimal point respectively.Continue to move the cursor until the desired character to be edited isunderscored (selected). Use the UP or DOWN arrow keys to scroll throughthe available fixed FEC rates to select one of the fixed rates.Continue pressing the UP/DOWN arrow key to toggle through the availableforced * (star’ed) FEC rates. If the satellite does not generate an NID butdoes have a unique combination of FREQ, BAUD and FEC lock, select theappropriate FEC* choice from this list. The ACU will then generate its ownunique forced NID (FFFE for DSS signals or FFFD for DVB signals) torepresent the desired satellite. You will need to enter this pseudo NID in theNID setting below.Finally, SCPC mode may be selected for narrow band use, which willchange the FREQ and BAUD displays as noted above. All other FECselections are DVB mode.Press ENTER to set the desired Voltage setting and return to the Voltagedisplay OR Press NEXT to abort and return to the main Satellite display.

NID 0000 AGC 1234Press DOWN or ENTER to access the NID #### AGC 1234. This settingis used to enter the NID (or forced NID) of the satellite you want to Track.The Network ID is a four digit HEX value. Enter 0000 if no NID is available,or to test for proper FREQ, BAUD & FEC settings. NID MUST be set to0000 in SCPC mode.To manually update, press the LEFT or RIGHT arrow key to bring the cursorup under the character to the left, or right, of the decimal point respectively.Continue to move the cursor until the desired character to be edited isunderscored (selected). Use the UP or DOWN arrow keys to increment ordecrement the selected character.Range of NID is 0000-FFFF (HEX).Press ENTER to set the desired NID and return to the NID display ORPress NEXT to abort and return to the main Satellite display.

DAC-2200 Operation Flowchart - Page 2 - SATELLITE menu

SAT 101 W THRS 1234

FREQ 1100 NID 1234

SAT 101.0 W

THRS 1234

FREQ 1100 AGC 1234

BAUD 00000 AGC 1234

In DVB Mode “FREQ 1100 AGC 1234” will be displayed. InSCPC Mode “MHz 1111 AGC 1234” will be displayed. See FECsetting below.

SatelliteTo Antenna Display on Page 3

In DVB Mode “BAUD 00000 AGC 1234” will be displayed. InSCPC Mode “kHz 0999 AGC 1234” will be displayed. See FECsetting below.

From ShipDisplay onPage 1


To SAVE &Execute.

To EXIT

OR

OR


To SAVE &Execute.

To EXIT


To SAVE &Execute.

To EXIT

OR

OR


To SAVE &Execute.

To EXIT

Tone OFF AGC 1234

FEC AUTO AGC 1234

NID 0000 AGC 1234

Volt HORZ AGC 1234

If SCPC is selected, the receiver will be in SCPC Mode. Allother FEC rate settings are DVB Mode. The mode selectedeffects the displays above.

OR


To SAVE &Execute.

To EXIT


To SAVE &Execute.

To EXIT

OR

OR

OR


To SAVE &Execute.

To EXIT


To SAVE &Execute.

To EXIT


2-12

2.5.3. ANTENNA information menus.

Display MeaningAZ 123.4 EL 056.7

REL 234.5 AGC 1234Press the NEXT key until the Antenna menu is displayed. This is the displayof the current Antenna information.REL is a display of the antenna position relative to the bow of the ship and isused to set Radiation Hazard & Blockage Mapping points (see AZ LIMITparameters).To manually move the antenna, turn Tracking OFF and press the UP,DOWN, LEFT or RIGHT arrow key to move the antenna in those respectivedirections. Sequentially pressing the desired arrow key will step the antennain small individual increments. Press & Hold the desired arrow key to slewthe antenna up or down in rapid steps.

AZ 123.4

# AGC 1234Press ENTER to begin edit mode and access the Azimuth position entrymode. This allows you to set a value to Target the antenna to and displaysthe current True Azimuth position of the antenna [the sum of ships heading(HDG) and antenna relative (REL) position reduced to 0-359.9 degrees]. Tomanually drive the antenna in azimuth (assure that Tracking is OFF):DishScan tracking signals ( # ) will appear in the lower left of the display.Periodic 2, 4, 6 or 8 are normal DishScan tracking signals.Current IF signal level (AGC) is displayed to assist you in manually peakingAZ for best signal level.To manually update, press the LEFT or RIGHT arrow key to bring the cursorup under the character to the left, or right, of the decimal point respectively.Continue to move the cursor until the desired character to be edited isunderscored (selected). Use the UP or DOWN arrow keys to increment ordecrement the selected character.Press ENTER to target the antenna to the new Azimuth position and return toAzimuth display. OR Press NEXT to abort and return to the main Antennadisplay.

EL 056.7

# AGC 1234Press DOWN or ENTER to access the Elevation position entry mode.This allows you to set a value to Target the antenna to and displays thecurrent Elevation angle of the antenna (0-90.0). To manually drive theantenna in elevation (assure that Tracking is OFF):DishScan tracking signals ( # ) will appear in the lower left of the display.Periodic 2, 4, 6 or 8 are normal DishScan tracking signals.Current IF signal level (AGC) is displayed to assist you in manually peakingEL for best signal level.To manually update, press the LEFT or RIGHT arrow key to bring the cursorup under the character to the left, or right, of the decimal point respectively.Continue to move the cursor until the desired character to be edited isunderscored (selected). Use the UP or DOWN arrow keys to increment ordecrement the selected character.Press ENTER to target the antenna to the new Elevation position and returnto Elevation display. OR Press NEXT to abort and return to the mainAntenna display.


2-13

REL 234.5 AGC 1234Press DOWN or ENTER to access the Relative Azimuth position entrymode. This allows you to set a value to Target the antenna to and displaysthe current Relative azimuth position of the antenna.REL is a diagnostic display of the antenna position relative to the bow of theship, ranging from 020.0-700.0, with 360.0 indicating when antenna is pointedin-line with the bow. UNWRAP should occur at REL 023.0 & 697.0.The REL position of the antenna is also used to set Radiation Hazard &Blockage Mapping points (AZ LIMIT 1 and AZ LIMIT 2).To manually drive the antenna in Relative (assure that Tracking is OFF) andpress the LEFT or RIGHT arrow key to bring the cursor up under thecharacter to the left, or right, of the decimal point respectively. Continue tomove the cursor until the desired character to be edited is underscored(selected). Use the UP or DOWN arrow keys to increment or decrement theselected character.Press ENTER to target the antenna to the new Relative position and return toRelative display. OR Press NEXT to abort and return to the main Antennadisplay.

POL 0000 AGC 1234Press DOWN or ENTER to access the Polarization entry menu. Auto-Polarization is the DEFAULT method of polarization adjustment. To optimize,or manually adjust, polarization refer to the Setup and Maintenance sectionsof this manual

DAC-2200 Operation Flowchart - Page 3 - ANTENNA menu

To Status Display on Page 4

FromSatelliteDisplay onPage 2


To SAVE &Execute.

To EXIT


To SAVE &Execute.

To EXIT

OR

OR


To SAVE &Execute.

To EXIT


To SAVE &Execute.

To EXIT

OR

OR

AZ 123.4 EL 056.7REL 234.5 AGC 1234

AZ 123.4# AGC 1234

EL 056.7

# AGC 1234

REL 000.0 AGC 1234

Antenna

Use the LEFT or RIGHT arrow keys to move the antenna Left (Down) or Right (Up) in Azimuth.

Use the UP or DOWN arrow keys to move the antenna Up or Down in Elevation.

POL 0000 AGC 1234


2-15

2.5.4. Status information menus.

Display MeaningSEA TEL,INC - MASTER

DAC-2200 VER 5.01Press the NEXT key until the Status menu is displayed. This is thepower-up display of the Master (ACU) and Remote (PCU) Model &Software Version(s) information.

CONTROL

TRACKING KuHi OFFPress the ENTER key once to display the Status – Tracking menu. Thisis the display of the current Tracking information.Use the Tracking or UP arrow key to toggle Tracking ON/OFF.Use the DOWN arrow key (two times within 3 seconds) to toggle theBAND selection (Ku or C/X). Then use the DOWN arrow key once totoggle between KuHi/KuLow OR C/X. Band selection controls the locallogic output state of SW1 output terminal on the 25 pin Terminal MountingStrip PCB and remote C/Ku relays on the antenna pedestal. When KuHior X band is selected the SW1 output will be shorted to ground (currentsink of 0.5 amps max) to control below decks band selection tonegenerators or coax switches. When KuLo or C is selected the SW1 outputis open (floating).If AZ Limits have been set to mask a blockage zone “BLOCKED” willappear at the end of the second line when the antenna is in the describedblockage zone(s). This function controls the logic output state of SW2output terminal on the 25 pin Terminal Mounting Strip PCB. WhenBLOCKED the SW2 output will be shorted to ground (current sink of 0.5amps max) to control below decks dual antenna coax switches or TXinhibit control to a satellite modem for radiation hazard control or TX mutefor FCC compliance. To test the blockage output press the RIGHT arrowkey to bring up and move the cursor to the far right. Press the UP arrow tosimulate BLOCKED condition and short on SW2. Press the LEFT arrowkey and then press the UP arrow key to turn the BLOCKED condition OFFand open on SW2.

CONTROL

SEARCH 2 OFFPress DOWN or ENTER to access the Status – Searching menu.Use the UP arrow key to cause a manual SEARCH to begin (SEARCH 2ON and the Search LED goes ON). Use the DOWN arrow key to stop asearch (SEARCH 2 OFF and the Search LED goes OFF).Press ENTER to save and execute or press NEXT to abort and return tothe main Status display.


2-16

STATUS

ERROR LLLL RRRRPress DOWN or ENTER to access the Status – Error menu.LLLL - Comms Error Count - Indicates the number of times that aPedestal M&C communication message (between the ACU and PCU) wasnot received correctly. Occasional counts are normal but more than 10per minute indicates a problem that needs attention (refer toTroubleshooting section).RRRR - Error Code - indicates the SUM of the discrete error(s) thathave occurred. It does not indicate how many of a particular error haveoccurred.

128 Satellite Out Of Range 64 Reserved for future use 32 Reserved for future use 16 Conscan Error 8 Pedestal Error 4 ACU-PCU Communication Failure 2 Wrong Synchro Converter Type 1 Gyro Read Error

Refer to the Maintenance section of this manual for troubleshootingfrequent or constant errors.Pressing UP arrow key and then the ENTER key clears error count, statuscode and extinguishes the Error LED.

STATUS

REMOTE AUX 0000Press DOWN or ENTER to access the Status – Remote Aux menu.Diagnostic display of Remote auxiliary read. This is typically used toindicate Temperature or EIRP readings from the antenna. Refer to yourantenna manual.

Use the LEFT and RIGHT arrow keys toscroll through the Tracking Band selectionsKu Lo, Ku Hi, DLA and DSS. Use theTracking button to toggle ON/OFF state ORuse the UP arrow to turn Tracking ON, usethe DOWN arrow to turn Tracking OFF.

To SAVE &Execute.

To EXIT

DAC-2200 Operation Flowchart - Page 4 - STATUS Menu

OR

OR

Use the UP arrow key to turn expandingsquare search pattern ON. Use the DOWNarrow key to turn search OFF.

To SAVE &Execute.

To EXIT

LLLL - Comms Error Count - display (only).RRRR - Error Code - indicates the SUM ofthe discrete error(s) that have occurred.Pressing UP arrow key clears error count,status code and extinguishes the Error LED.

To SAVE &Execute.

To EXIT

OR

SEA TEL INC - MASTER

DAC-2200 VER 5.00

StatusFromAntenna

Display onPage 3

To Ship Display on Page 1

CONTROL

TRACKING Ku OFF

CONTROLSEARCH 2 OFF

STATUS

ERROR LLLL RRRR

STATUSREMOTE AUX 1234

OR

Remote Auxiliary read diagnostic display.Typically used to display temperature of EIRPreadings.

To SAVE &Execute.

To EXIT


2-18

2.5.5. SETUP Parameter display and entry menus.Access to the password protected system setup parameters is only required after installation or repairs ofyour antenna system. These parameters should only be changed by an authorized service technician.

CAUTION: Improper setting of these parameters will cause your system to not to perform properly.

Refer to the SETUP information in the Installation section of this manual.

2.6. Tracking OperationYou can toggle Tracking ON/OFF by simply pressing the Tracking key.

Tracking optimizes the pointing of the antenna, in very fine step increments, to maximize the level of thesatellite signal being received.

2.6.1. DishScan OperationThis system uses a variation of Conical scanning, called DishScan, which continuously drives the antennain a very small diameter circle at 60 RPM. The received signal is evaluated throughout each full circlerotation of the antenna to determine where the strongest signal level is and will issue the appropriateAzimuth and/or Elevation steps to the antenna, as needed, 60 times per minute.

When you are in the AZIMUTH or ELEVATION entry menu, the DishScan commands (2, 4, 6 or 8) will bevisible in the lower left corner of the display. A 2 = DOWN, 4 = LEFT, 6 = RIGHT and 8 = UP. WhenTracking is turned OFF these commands indicate movement direction that is needed, but the commandswill not be issued to the antenna to actually re-position it. Tracking must be turned ON to keep theantenna peaked on the satellite.

If the antenna is already perfectly pointed, the signal received (AGC) throughout each full circle will beequal. If the dish is slightly mispointed, a portion of the circle movement will have higher signal level thanthe rest of the circle. DishScan will then issue a step in Azimuth, and/or Elevation, to move the antenna inthe direction of the stronger signal. [EXAMPLE: If the dish is mispointed slightly to the LEFT of thesatellite peak; as DishScan drives the antenna through one circle rotation it will evaluate that the signal isslightly higher to the RIGHT, therefore, a RIGHT (Azimuth UP) step will be issued to the antenna].

The internal tracking receiver settings must be set correctly and the EL STEP SIZE, AZ STEP SIZE andSTEP INTEGRAL parameters must all be set to 0000 for DishScan to operate properly.

2.6.2. Internal Tracking Receiver settingsThe internal receiver settings must be correctly for either Tracking mode to be able to properly peak theantenna on the desired satellite. Refer to the “Satellite” menu operation above.

2.6.3. C/X and Ku Band SelectionsBand Selection must be set to the appropriate selection for Tracking to operate properly. For C, X and Kuband systems the pre-set tracking parameters for Conscan can be changed in the TRACKING window bypressing the DOWN arrow. The display will indicate which band is selected. The EL STEP SIZE, AZSTEP SIZE and STEP INTEGRAL parameters will be set accordingly.

This also selection controls an External Tone Generator logic output on the Terminal Mounting Strip ANDremote C/Ku coax relays mounted on Dual C / Dual Ku Antenna systems.


2-19

2.7. Searching OperationA search pattern will automatically be initiated when AGC falls below the current Threshold setting (indicatesthat satellite signal has been lost).

The search, it’s pattern dimensions andtiming are determined by the SETUPsearching parameters SEARCH INC,SEARCH LIMIT and SEARCH DELAY.Search is also affected by the Threshold andthe internal receiver settings under theSatellite menu.

Search is conducted in a two-axis patternconsisting of alternate movements in azimuthand elevation (forming expanding square).The size and direction of the movements areincreased and reversed every other timeresulting in an increasing spiral pattern as shown.

Search can be initiated manually by selecting the Status - Searching menu and pressing the UP key. Whilein the Searching window, pressing the DOWN key will stop a search. Search is terminated automaticallywhen the AGC level exceeds the threshold value.

2.8. Auto-Polarization OperationAnother feature of the ACU is auto-polarization. The ACU automatically calculates the required polarizationangle for the feed every 2 seconds based on ship's Latitude, Longitude and the Satellite Longitude. If thepolarization of the feed is not properly peaked, the ACU will send a command to the PCU to drive the 24V DCmotor drive on the feed to peak the polarization.

There is no other operation required when the system is in auto-polarization mode. The system may be putinto manual polarization mode for diagnostic and troubleshooting purposes (refer to your antenna manual).

2.9. Radome Assembly OperationWhen operating the system it is necessary that the radome access hatch, or door, be closed and secured inplace at all times. This prevents rain, salt water and wind from entering the radome. Water and excessivecondensation promote rust & corrosion of the antenna pedestal. Wind gusts will disturb the antenna pointing.There is no other operation of the radome.


2-20


DAC-2200 Antenna Control Unit Basic System Information

3-1

3. Basic System InformationThis section provides you with some additional information about the satellites you will be using, some basics ofyour satellite antenna system and other equipment within your system configuration. For more information aboutyou specific antenna, refer to its manual.

3.1. Satellite BasicsThe satellites are in orbit at an altitude of 22,753.2 Statute Miles directly above the equator. Their orbitalvelocity matches the Earth’s rotational speed, therefore, each appears to remain at a fixed position in the sky(as viewed from your location).

3.1.1. FrequenciesYour antenna can be provided with the appropriate feed and LNB(s) to operate using Linear or Circularpolarized satellite signals in a variety of frequency bands. The most common receive frequency bands areC-Band (3.7-4.2 GHz) and Ku-Band (10.95-12.75 GHz).

At these frequencies the signal from the satellite travels only in a straight line and is affected by weatherchanges in the atmosphere. There are several conditions that can cause a temporary loss of satellitesignal, even within an area where the signal level is known to be adequate. The most common of thesenormal temporary losses are blockage and rain fade. They will interrupt services only as long as thecause of the loss persists.

Blockage - Blockage is loss due to an object in the path of the signal from the satellite to the dish. If anobject that is large and dense is positioned in the path of the signal from the satellite, it will preventsufficient signal from arriving at the dish. The signal can not bend around, or penetrate through, theseobjects and the reception will be degraded or completely interrupted. The dish is actively driven to remainpointed at the satellite (toward the equator) so, as the boat turns a mast or raised structure of your boatmay become positioned between the satellite and the dish. Blockage may also be caused by a personstanding near the radome, tall mountains, buildings, bridges, cranes or other larger ships near your boat.Signal will be lost when the boat is housed inside an enclosure that the signal cannot penetrate, like apaint shed or a berth with a roof. Moving or rotating the boat to position the antenna where it has anunobstructed view to the desired satellite will restore the antennas’ ability to receive the satellite signal.

Rain Fade - Atmospheric conditions that may cause sufficient loss of signal level include rain, snow,heavy fog and some solar activities (sun spot and flare activity). The most common of these is referred toas “rain fade”. Rain drops in the atmosphere reduce the signal from the satellite. The heavier the rain thehigher the amount of signal loss. When the amount of loss is high enough, the antenna will not be able tostay locked onto the satellite signal. When the amount of rain has decreased sufficiently, the antenna willre-acquire the satellite signal. In a strong signal area, rain fall of about four inches per hour will causecomplete loss of signal. In weaker signal areas the effects would be more pronounced.

3.1.2. Signal levelThe level of the receive signal is dependant upon how powerful the transmission is and how wide thesignal beam coverage area is. Focusing the signal into a narrower beam concentrates its energy over asmaller geographic area, thereby increasing the signal level throughout that area of coverage. Thismakes it possible for you to use a smaller antenna size to receive that satellite signal. The antennasystem must be geographically located in an area where the signal level from the satellite meet, orexceed, the minimum satellite signal level required for your size of antenna (refer to your Antenna manual)to provide suitable reception. This limits the number of satellites that can be used and the geographicareas where the boat can travel where the signal level is expected to be strong enough to continueproviding uninterrupted reception. When travelling outside this minimum signal coverage area, it is normalfor the system to experience an interruption in its ability to provide the desired satellite services untilentering (or re-entering) an area of adequate signal level (refer to the satellite footprint information below).

Basic System Information DAC-2200 Antenna Control Unit

3

3.1.3. Satellite FootprintsThe focused beam(s) from the satellites are normally aimed at the major land masses where there arelarge population centers. Footprint charts graphically display the signal level expected to be received indifferent geographic locations within the area of coverage. The signal will always be strongest in thecenter of the coverage area and weaker out toward the outer edges of the pattern. Refer to the satellitefootprint information in Antenna manual, it contains some of the footprint charts that are expected to beadequate for your antenna model to be used. The coverage areas are intended to be a guide toreception, however, the actual coverage area and signal level may vary. Also, the signal strength isaffected by weather (ie rain fade).

3.1.4. Satellite PolarizationSatellites may transmit their signals in one of two different polarization modes, linear or circular. YourAntenna may be fitted with the correct feed assembly to operate with Linear (with linear LNB installed) ORCircular (with circular LNB installed) satellite transmissions.

Circular reception does NOT require Polarization adjustment to optimize the reception.

Horizontal and vertical linear polarized satellite transmissions, require periodic adjustment of“polarization”. Polarization adjustment is required to optimize the alignment of the LNB to match the angleof the signal from the satellite.

When you are on the same longitude as thesatellite, its’ horizontal and vertical signalswill be purely aligned to your horizon. Whenthe satellite is east or west of your longitude,the satellite signals will appear to be rotatedclockwise or counter-clockwise from purehorizontal and vertical. Both horizontal andvertical signals from a satellite will appear tobe rotated the same amount and are alwaysperpendicular to each other. The amount ofrotation is dependent on how far east orwest the satellite is from you and how closeyou are to the Equator.

3.2. Antenna BasicsThe following information is provided to explain som

3.2.1. AzimuthThe CW / CCW rotation of the antenna is knownmotor, is required during stabilization, searchingthe boat turns, azimuth is driven in the opposite dazimuth pointing angle to the satellite is determinof the satellite. It is important to know that in norsatellite, the antenna should be pointed generally

In the Northern Hemisphere, the azimuth angle tnorth) if the satellite is at the same longitude thalongitude the azimuth will be less than, or greate

When checking for blockage you can visually looany objects are in between the antenna and the also be useful to remove the radome top to see equator).

Figure 3-1 Satellite Signal Polarization

-2

e of the basic functions of the antenna:

as Azimuth. Azimuth drive, provided by the azimuth, tracking and unwrap operations of the antenna. Whenirection to remain pointed at the satellite. The actualed by your latitude, longitude, Heading and the longitudemal operation on a satellite, or when trying to acquire a toward the equator.

o the satellite will be 180 degrees true (relative to truet you are on. If the satellite is east, or west, of yourr than 180 degrees respectively.

k over the antenna radome toward the equator to see ifsatellite. If you are not able to find any satellites it mayif the dish is aimed in the correct direction (towards the


3-3

F n

3.2.2. ElevationThe antenna can be driven in elevation from 0 degrees (horizon) to 90 degrees (zenith). Elevation drive,provided by the elevation motor, is required during stabilization, searching and tracking operations of theantenna. The actual elevation pointing angle to the satellite is determined by your latitude & longitude andthe longitude of the satellite. In general, the elevation angle will be low when you are at high latitudes andwill increase as you get closer to the equator.

Refer to figure 3-1 above and note that from any given latitude, the elevation will be highest when thesatellite is at the same longitude that you are on. If the satellite is east, or west, of your longitude theelevation angle will be lower.

3.2.3. Antenna polarization

If you have a circular polarizationLNB installed, you do not need toadjust the “polarization” of theantenna.

If you have a linear polarization LNBinstalled, the system should havebeen adjusted properly and set-up inAuto-Polarization mode.

Auto-Polarization makes smallpolarization adjustments periodicallyas the boat changes geographiclocations by a significant amount oflatitude and longitude. It also adjuststhe polarization of the feed whenchanging from one satellite to another.

Once polarization adjustment hasbeen optimized, it is NOT necessaryto readjust it as long as the boatremains in the same geographic areaand stays on the same satellite.

3.2.4. StabilizationThe Sea Tel antennas are stabilized in all three axescoupling the ships’ motion from the antenna. Simply satellite while the boat turns, rolls or pitches under it. on the antenna pedestal assembly senses the motionopposition to the sensed motion. Azimuth (AZ), Elevstabilized automatically by the PCU as part of its norm

igure 3-2 Circular and Linear Polarizatio

of motion. Stabilization is the process of de-put, this allows the antenna to remain pointed at the To accomplish this, the Pedestal Control Unit (PCU) and applies drive to the appropriate motor(s) in

ation (EL) and Cross-Level (left-right tilt) are activelyal operation.


3-4

3.2.5. Tracking ReceiversSatellite Identification Receiver - The Satellite Identification Receiver located in the Antenna ControlUnit (ACU) is used to acquire, identify and track a specific satellite by its unique hexadecimal ID code.When properly setup, the settings for the satellite are saved to expedite future acquisition of the desiredsatellite.

When searching for the selected satellite this receiver compares the present satellite ID to the targetedsatellite ID code. If the ID code does not match the antenna will continue searching until the correctsatellite is found. The system must have adequate satellite signal level, AND the matching NID, to stopsearching (and begin tracking the desired satellite).

If you have the optional Touch Screen Controller (TSC-10) you can setup multiple “favorite satellites” andsubsequently switch to different “favorite” satellite in two touches on the screen.

3.2.6. TrackingThe ACU actively optimizes the pointing of the dish for maximum signal reception. This process is calledtracking and is accomplished by continuously making small movements of the dish while monitoring thelevel of the received signal. Evaluation of this information is used to continuously make minor pointingcorrections to keep the signal level “peaked” as part of normal operation.

3.2.7. Unwrap vs Unlimited AzimuthYour antenna may have mechanical stops that limit its azimuth rotation. When the azimuth rotation iswithin 5 degrees of either mechanical stop, the antenna will be driven 360 degrees away from that stop.This function is called UNWRAP. This “unwinds” the cables that are routed through the pedestalassembly and repositions the antenna to a mid-point between the two stops. By rotating 360 degrees theazimuth position of the antenna will have returned to the previous position and will resume normal satellitetracking. Unwrap will occur when the boat continues turning far enough in one direction for it to berequired. It is normal for the satellite signal to be lost until the antenna completes unwrap and resumestracking the satellite.

Unlimited Azimuth antennas do not have mechanical stops in azimuth, therefore, do NOT requireUNWRAP. To find out if your antenna is unlimited or not, refer to your Antenna manual.

3.3. Components of the System ConfigurationThe following text provides a basic functional overview of the system components and componentinterconnection as referred to in the System Block Diagram for your model antenna.

Television Receive Only (TVRO) Systems are comprised of two major sections: The Above-DecksEquipment (ADE) is comprised of the Sea Tel antenna & radome assembly which is mounted outside, onan upper deck location chosen for best satellite reception. The Below-Decks Equipment (BDE) includesthe Antenna Control Unit, may include the optional Touch Screen Controller panel, and will have satellitereceiver(s), TV set(s) and all other ancillary equipment that is mounted in various locations throughout theinterior of the ship.

Transmit/Receive (TXRX) Systems are also comprised of two major sections: The Above-DecksEquipment (ADE) is comprised of the Sea Tel antenna & radome assembly which is mounted outside, onan upper deck location chosen for best satellite reception. The Antenna inside the radome has Transmit& Receive RF equipment mounted on it. The Below-Decks Equipment (BDE) includes the AntennaControl Unit, may include the optional Touch Screen Controller panel, and will have satellite modem,Multiplexer and all other ancillary communications equipment that is mounted in various locationsthroughout the interior of the ship.


3-5

3.3.1. Antenna ADE AssemblyRefer to your Antenna manual for specific information about your antenna, radome and interconnectingcables.

3.3.2. Antenna Control UnitThe Antenna Control Unit allows the operator to control and monitor the antenna pedestal with dedicatedfunction buttons, LED’s and a 2 line display. The ACU and its Terminal Mounting Strip are normallymounted in a standard 19” equipment rack. The ACU should be mounted in the front of the equipmentrack where it is easily accessible. The Terminal Mounting Strip is normally mounted on the rear of theequipment rack. It is recommended that the antenna control panel be mounted near one of the SatelliteReceiver locations where you can see the television screen while you are controlling the antenna.

The Antenna Control Unit is connected to the antenna, ships Gyro Compass and to the optional TouchScreen Controller (when included).

Figure 3-3 DAC-2200 Antenna Control Unit

3.3.3. TSC-10 Touch Screen Controller (OPTIONAL)A Touch Screen Controller may be included in your configuration. This allows you to control the antennafrom a user friendly SVGA graphic userinterface panel.

Much of the ship, satellite, antenna andstatus information can be viewed on thehome display of the panel. An externalcomposite video input is displayed in aninset window, which can be expanded tofull screen with a single touch. Thevideo input (NTSC or PAL) can be fromone of your satellite receivers or anyother composite video source (ie.computer, weather or navigationdisplays).

It allows you to setup several “favorite”satellites and switch from one to anotherin a single touch of the screen!

All other functions of antenna setup, operation and even operator troubleshooting are also just a fewtouches away!

3.3.4. Power SupplyAC Voltage - An appropriate source of AC Voltage will also be required for the ACU, satellite receiversand television monitors. Refer to the manuals for these devices for voltage and power consumption ofeach. Total power consumption will depend on the number of satellite receivers and television monitorsused.

Figure 3-4 TSC-10 Touch Screen Controller (OPTIONAL)


3-6


DAC-2200 Antenna Control Unit Installation

4-1

4. InstallationBelow are basic steps to guide you in installing this equipment, but you may choose to completed installation stepsin a different order. Read this complete section before starting.

The following instructions describe the installation procedures for installing the DAC-2200 Antenna Control Unit.

The installation of the Antenna Pedestal (ADE) is outlined in the Pedestal Installation and Operation manual andmay already have been performed. The installation of the OPTIONAL Touch Screen Controller is outlined in theTSC-10 Installation and Operation manual and may already have been performed.

4.1. General Cautions & Warnings

CAUTION - Electrical Shock Potentials exist on the GyroCompass output lines. Assure that the Gyro Compassoutput is turned OFF when handling and connecting wiringto the Terminal Mounting Strip.

CAUTION - Allow only an authorized dealer to install or servicethe your Sea Tel Television Receive Only System components.Unauthorized installation or service can be dangerous and caninvalidate the warranty.

4.2. Site SurveyFind the best location for the ACU and other Below Decks Equipment. Assure that each piece of equipmentis properly mounted. They should have sufficient cable to pull the equipment out of its mounting location anddisconnect the cables attached to it. There should be plenty of air space between units to allow heat to ventoff of the equipment. If the mounting location is a closed space, assure that the equipment will not bedamaged by trapped heat, install vents and/or fans to evacuate the heat.

4.3. Preparing For The InstallationAlways prepare for the installation before you actually start.

4.3.1. Unpack Shipping Crates and Inspect / InventoryUnpack the crates. Inspect everything to assure that all materials have been received and are in goodcondition.

4.3.2. Preparing BDE LocationPrepare the Rack (or other location) for the ACU, Terminal Mounting Strip and base multiplexer panel.Prepare the mounting locations for the other Below Decks Equipment throughout ship.

4.3.3. Read the Installation InformationRead the Installation section of the ACU and Antenna Pedestal manuals to be familiar with the installationof each.

Installation DAC-2200 Antenna Control Unit

4-2

4.3.4. Plan The InstallPlan your installation. You may wish to follow a different order of installation steps than is recommendedin these manuals.

4.3.5. The Installing CablesInstalling appropriate cables from location to location. Refer to the System Block Diagram in your Antennamanual.

4.4. Install the ACUInstall the ACU in the front of the standard 19” equipment rack or other suitable location.

4.5. Install the Terminal Mounting Strip (TMS)Install the TMS in the rear of the standard 19” equipment rack or other suitable location.

4.6. Install the Base Multiplexer PanelInstall the panel in the rear of the standard 19” equipment rack or other suitable location.

4.7. Terminal Mounting Strip (TMS) ConnectionsThere are several functional connections that may be made on the TMS connectors. You may not need tomake all of these connections, but they are listed here for you to decide which ones you do need to makeduring the installation. Connect the 9 pin ribbon cable from this PCB to J13 “NMEA” jack on the rear panel ofthe ACU. Connect the 25 pin ribbon cable from this PCB to J3 “Gyro Compass” jack on the rear panel of theACU. They are:

CAUTION - Electrical Shock Potentials exist on the Gyro Compassoutput lines. Assure that the Gyro Compass output is turned OFFwhen handling and connecting wiring to the Terminal Mounting Strip.

TB-1 Synchro Gyro Compass Input. Use the R1, R2, S1,S2 and S3 screwterminals to connect the Synchro Gyro Compass to the ACU.

TB-2 Control Interface Connections.

SW2 - The Blockage/TX Mute Control output is driven by Blockageand RF Radiation Hazard functions. This output will short to groundwhenever the antenna is within the AZ LIMIT zone(s) or is Searching,Targeting, Unwrapping or is mispointed 0.5 degrees from satellitepeak. This output is commonly used to drive:

• Dual Antenna Arbitrator coax switches in TVRO dual antennaconfigurations. The coax switches select which antenna is feedingsignal to the matrix switch.

• Mute the Transmit output of the Satellite Modem used in TX/RXantenna configurations when the antenna is positioned wherepeople may be harmed by the transmit power emanating from theantenna (RF Radiation Hazard).

• Mute the Transmit output of the Satellite Modem used in TX/RXantenna configurations when the antenna is mispointed by 0.5 degrees, or more, and keep it muteduntil the antenna has been within 0.2 degrees of peak pointing to the satellite for a period of 5 seconds(FCC part 25.221 & 25.222 TX Mute requirement).


4-3

SW1 - Band Selection control output. This output is used to control below decks tone generator(s), orcoax switch(s), for band selection functions. The band selection control output is driven by the bandselected in the MODE – TRACKING display.

• Tone generators are used to provide a 22 kHz tone, tone ON when hi band is desired and tone OFFselects low band. The tone generators are commonly used to provide band control of an AmericasLNB.

• Coax switches might be used to select which signals are to be routed to the matrix switch.

AGC & GND - External AGC, or Modem Lock, input.

• External AGC input must be 0 to 5 Volts DC analog signal, positive going voltage proportional tosatellite signal input level and must be real-time in its response to antenna pointing.

• External Modem Lock from a satellite modem is used as a positive ID that the antenna is on thedesired satellite. This input is NOT used for Tracking purposes, it is only used for satelliteidentification to acquire the correct satellite during search. To enable the external modem input youmust include a 2 in the SYSTEM TYPE parameter (If your system type is presently 76 or 77, thenchange it to 78 or 79) and NID MUST be set to 0000.

• Connections - The modem lock signal connects to EXT AGC and a ground reference from themodem connects to GND. The expected signal from the modem is 0VDC to +5VDC. Lowvoltage indicates modem lock, high voltage indicates modem unlock.

NOTE - If the modem signalproduces a negative voltage, anexternal diode will need to beinstalled across the modemsignal and ground (Cathode tomodem signal, Anode to ground).Voltages up to +/- 15 VDC can beused with addition of a resistorvoltage divider to supply 0-5VDC into the ACU . An example of external components isshow here.

• Testing - The input connections from the modem can be tested by selecting the external AGCinput and monitoring the displayed value. To select external AGC, set the tuning frequency to0000. Normally, AGC readings below 2048 are considered a low condition and indicate modemlock and AGC readings above 2048 are considered a high condition and indicate modem unlock.[If you find the AGC reading for locked and unlocked conditions to be reversed you must add 128to your current SYSTEM TYPE parameter]. Turn tracking OFF when checking the external AGCinputs. Be sure to properly retune the receiver frequency when you are finished testing theexternal input.

• Operation - In NORMAL operation, AGC must be above Threshold AND external MODEMLock input must be locked to Track the satellite. If you are tracking a satellite signal and theAGC is above threshold (Tracking light on solid) but the external AGC signal rises above 2.5volts for more than 20 seconds (external MODEM input UNLOCKED) the ACU will automaticallyretarget the selected satellite.


4-4

TB-3 Step-By-Step (SBS) Gyrocompass Input. Use the COM, A, B and C screw terminals to connect the SBSGyrocompass to the ACU. Some SBS Gyro distribution boxes have terminals which are labeled S1, S2 & S3instead of A, B and C.

TB-4 NMEA 9-pin PCB.

TX+ and TX- screw terminals are used to provide GPS NMEAGPGGA output to a Satellite Modem used with Sea TelTransmit/Receive (TX/RX) antennas.

RX+ and RX- screw terminals are commonly used to connectGPS (Latitude and Longitude) or Gyro Compass (Heading)NMEA inputs to the ACU J-13 communications port.

+24V and GND screw terminals are commonly used to provide+24 VDC operating voltage to a GPS, Dual Antenna Arbitrator orother below decks tone generators or switches.

4.8. AC Power To The ACUAssure Power switch on the front panel of the ACU is turned OFF. Connect AC Power cord to the ACU andto the AC Power outlet.

4.9. AGC Tracking ConnectionConnect the IF Coax from one of the available outlets on the splitter or matrix switch to “RF IN” jack on therear panel of the ACU.

For external AGC, connect a cable between the AGC or TM output of the master receiver or modem and theterminals labeled “EXT AGC” and “ GND” TB2 of the Terminal Mounting Strip.

4.10. Monitor And Control ConnectionsThe Monitor and Control port allows external control from a PC using a communications program such asHyperTerminal. The ACU is wired as a DTE device for direct connection to another DTE device such as aterminal or PC, a null modem cable as shown in drawing 116670 is required.

CAUTION: DC Voltage exists Aux Serial Port connectors that will damage yourcomputer COM port. The Monitor & Control computer connection to the ACU MUST be anull modem cable as shown on Sea Tel drawing 116670.

Connect the null modem cable between J11 on the rear panel of the ACU and the ASCII terminal or PC serialinterface port (COM port). Set the terminal or PC to 4800 baud, 8 bits, no parity (9600 baud operation isavailable on the Aux Serial Board only by installing a jumper at D1).


4-5

4.11. Install Other BDE EquipmentInstall and connect the other below decks equipment.

4.12. Final Checks

4.12.1. Visual inspectionDo a visual inspection of your work to assure that everything is ready to proceed.

4.12.2. Electrical - Double check wiring connectionsDouble check all your connections to assure that it is safe to energize the equipment.

4.13. Power-UpRefer to the Antenna and Touch Screen Controller to complete installation of those items BEFORE turningthe ACU Power ON.

When all equipment has been installed, turn ACU Power ON. This will apply DC Power to the antenna and itwill begin Initializing. The ACU will initially display “SEA TEL – MASTER and DAC-2200 VER 5.xx”. About 10seconds later the display will change to “SEA TEL – REMOTE and INITIALIZING”. After initialization, thebottom line of the remote display will display the antenna model number and the software version of the PCU(ie 4004 VER 1.xx).

Energize and check the other Below Decks Equipment to verify that all the equipment is operating. You willneed to assure that the ACU is setup correctly and that the antenna acquires the correct satellite before youwill be able to completely check all the satellite receivers for proper operation.

4.14. SetupIf your system includes the Touch Screen Controller, refer to the Setup chapter in the TSC-10 manual tosetup the ACU. If not, refer to the Setup instructions in the next section of this manual to assure that the ACUsettings and parameters are set correctly.


4-6


DAC-2200 Antenna Control Unit Setup

5-1

5. SetupBelow are basic steps to guide you in setting up the ACU. Assure that the Antenna Pedestal (ADE) has beenproperly installed.

If your system includes the OPTIONAL Touch Screen Controller, refer to the Operation & Setup chaptersin the TSC-10 manual to setup the ACU.

5.1. Operator SettingsRefer to the Operation chapter of this manual to set the Ship information. Latitude and Longitude shouldautomatically update when the GPS engine mounted on the antenna pedestal triangulates an accuratelocation, but you may enter this information manually to begin. You will have to enter the initial Heading of theship, subsequently the Gyro Compass will then keep the ACU updated.

Next, set the Satellite information. Longitude of the satellite you wish to use and the receiver settings for itare especially important.

At this point you should be able to target the desired satellite. Continue with the setup steps below tooptimize the parameters for your installation.

5.2. Default Setup Parameters For Your AntennaRefer to the Setup section of your antenna manual for the Default Setup Parameters which were entered intoyour ACU at the Factory. When your system was installed, your dealer will have changed some of theseparameters so that the ACU will read your Gyro compass input properly, optimize azimuth and elevationtargeting, optimize polarization and to assure that Tracking is in Conscan mode. In normal operation youshould NOT need to change these parameters.

CAUTION: Improper setting of these parameters will cause your system to not perform properly.

If you need to set, or change, a parameter refer to the Flow-Charts and individual parameter settinginformation below to optimize you settings.

5.3. SETUP Parameter display and entry menus.Press and hold BOTH the LEFT and the RIGHT arrow keys for 6 seconds to accessto the system setup parameters (at the EL TRIM selection). Press BOTH the LEFTand the RIGHT arrow keys momentarily to access to the system setup parameters (atthe SAVE NEW PARAMETERS parameter).

Access is only required after installation or repairs of your antenna system. These parameters should only bechanged by an authorized service technician. Access is only required after installation or repairs of yourantenna system. These parameters should only be changed by an authorized service technician.

CAUTION: Improper setting of these parameters will cause your system to not perform properly. Also referto the SETUP section of your Antenna manual.

SETUPEL TRIM 0000

SETUPAZ TRIM 0000

SETUPEL STEP SIZE 0000

SETUPAZ STEP SIZE 0000

SETUPSEARCH INCR 0010

SETUPSTEP INTEGRAL 0000

Setup (Page 1)

Press and HOLD both Setup keys for6 seconds to enter Setup Mode.

To/FromSetup page 2

To Operation FlowchartPage 4 - Status menu

OR


To SAVE &Execute.

To EXIT


To SAVE &Execute.

To EXIT

SETUP

AGC THRES 0100

OR


To SAVE &Execute.

To EXITOR


To SAVE &Execute.

To EXITOR


To SAVE &Execute.

To EXITOR


To SAVE &Execute.

To EXIT

OR

OR


To SAVE &Execute.

To EXIT

DAC-2200 Setup Flowchart - Page 1

OR


To SAVE &Execute.

To EXIT


To/FromSetup page 3


OR


To SAVE &Execute.

To EXIT


To SAVE &Execute.

To EXITOR

To EXITOR


To SAVE &Execute.

To EXITOR


To SAVE &Execute.

To EXITOR


To SAVE &Execute.

To EXITOR


To SAVE &Execute.

To EXIT

To/FromSetup page 1

OR

SETUP

SYSTEM TYPE 0005

SETUPGYRO TYPE 0002

SETUPPOLANG TYPE 0072

SETUPPOL OFFSET 0030

SETUPPOL SCALE 0090

Blank Step

SETUPSEARCH LIMIT 0100

SETUP

SEARCH DELAY 0030

OR

To EXIT


To/FromSetup page 4


OR


To SAVE &Execute.

To EXIT


To SAVE &Execute.

To EXITOR


To SAVE &Execute.

To EXITOR


To SAVE &Execute.

To EXITOR


To SAVE &Execute.

To EXITOR

To EXITOR

Press the UP arrow and then press theENTER key to save the parameters.“Settings Saved” will be displayed.

To SAVE &Execute.

To EXIT

To/FromSetup page 2

OR

SETUPTX Polarity 2

SETUPSAVE NEW PARAMETERS

SETUPAZ LIMIT 1 0000

SETUP

AZ LIMIT 2 0000

SETUP5V OFFSET 0000

SETUP

5V SCALE 0000

Blank Step

Blank Step

DAC-2200 Setup Flowchart - Page 4To Operation FlowchartPage 4 - Status menu

OR

Use to enter diagnostic commands, refer tothe troubleshooting section of the manual.

To SAVE &Execute.

To EXIT

Use to monitor diagnostic commands, refer tothe troubleshooting section of the manual.

To SAVE &Execute.

To EXITOR

Used to adjust the level cage to be level fore/aft and left/right. Refer to the troubleshootingsection of the manual.

To SAVE &Execute.

To EXITOR

Press the UP arrow and then press theENTER key to save the parameters.“Settings Saved” will be displayed.

To SAVE &Execute.

To EXITOR

Used to upload new software into thePedestal Control Unit. Refer to thetroubleshooting section of the manual.

To SAVE &Execute.

To EXIT

To/FromSetup page 3

REMOTE COMMAND

REMOTE TILT

REMOTE PARAMETERS

REMOTE MONITOR

REMOTE UPLOAD

Setup DAC-2200 Antenna Control Unit

5-6

5.4. EL TRIMElevation trim offset. Adjusts display to correct for antenna alignment errors or imbalances in the antennasystem. Increase number to increase display. Refer to “Optimizing Targeting” in the Setup section of yourantenna manual.

To update: While in the EL TRIM sub-menu, press the LEFT arrow key to bring the cursor up under the onesdigit. Press the UP or DOWN arrow key to increment or decrement the selected digit. Minus values areentered by decrementing below zero. Use the LEFT or RIGHT arrow key to move the cursor left or right toselect other characters to modify. When you are finished modifying press ENTER to execute the new valueOR press NEXT to abort and exit setup mode.

Continue with Azimuth trim, then re-target the satellite several times to verify that targeting is now driving theantenna to a position that is within +/- 1.0 degrees of where the satellite signal is located.

5.5. AZ TRIMAzimuth trim offset. Offsets true azimuth display to compensate for installation alignment errors when usedwith Ships Gyro Compass input reference. Does not affect REL azimuth reading. Increase number toincrease display. Refer to “Optimizing Targeting” in the Setup section of your antenna manual.

To update: While in the AZ TRIM sub-menu, press the LEFT arrow key to bring the cursor up under the onesdigit. Press the UP or DOWN arrow key to increment or decrement the selected digit. Minus values areentered by decrementing below zero. Use the LEFT or RIGHT arrow key to move the cursor left or right toselect other characters to modify. When you are finished modifying press ENTER to execute the new valueOR press NEXT to abort and exit setup mode.

Then re-target the satellite several times to verify that targeting is now driving the antenna to a position that iswithin +/- 1.0 degrees of where the satellite signal is located.

5.6. AUTO THRESSets offset of AGC tracking threshold above the average noise floor. Units are in A/D counts, approximately30 counts/dB. A setting of 0 disables auto threshold, therefore, the operator would have to manually enter athreshold value.

When AUTO THRESHOLD is enabled, the DAC-2200 automatically re-sets the AGC tracking thresholdwhenever the antenna Targets (AZ, EL or SAT), Searches or Unwraps. The new AGC threshold is set to theaverage signal level input (approximate background noise level) plus the AUTO THRES offset value.EXAMPLE: If the Noise Floor off satellite is 1000 counts of AGC and Auto Threshold is set to 100, Thresholdwill be set to approximately 1100 while the antenna is targeting, Searching or Unwrapping. If you wish tochange this parameter, refer to the Setup Flowchart to key in and save the desired value.

To change the Automatic Threshold value OR manually set threshold; Note the Peak “on satellite” AGCvalue, move EL and note the “off satellite” (Noise Floor) AGC value. Calculate the Difference between PeakAGC and Noise Floor AGC. AUTO THRES should be set to 1/3 (to ½) of the Difference. This will usually bearound 100 counts (3 dB) for a typical antenna configuration.

To manually update, press the LEFT arrow key to bring the cursor up under the least significant character.Continue to move the cursor until the desired character to be edited is underscored (selected). Use the UPor DOWN arrow keys to increment or decrement the selected character.

Use the LEFT or RIGHT arrow key to move the cursor left or right to select other characters to modify. Whenyou are finished modifying press ENTER to execute the new value OR press NEXT to abort and exit setupmode.


5-7

5.7. EL STEP SIZESets elevation Conscan sensitivity or the Step Track trial movement size. Units are in pedestal stepresolution and should be left at your antennas’ default value for Conscan or Step Track Tracking Mode.Refer to your antenna manual. Must be entered twice within 6 seconds.



5.8. AZ STEP SIZESets azimuth Conscan sensitivity or the Step Track trial movement size. Units are in pedestal step resolutionand should be left at your antennas’ default value for Conscan or Step Track Tracking Mode. Refer to yourantenna manual. Must be entered twice within 6 seconds



5.9. STEP INTEGRALSets the integration time for Tracking Mode. Units are in processor timing cycles and should be left at yourantennas’ default value for Conscan or Step Track Tracking Mode. Refer to your antenna manual.



5.10. SEARCH INCSets size of search pattern increment. Units are in pedestal step resolution (1/12 degree for xx04). Thesuggested setting is equal to 1/2 the 3dB beamwidth of your antenna. Refer to your antenna manual.




5-8

5.11. SEARCH LIMITSets the overall peak to peak size of the search pattern. Units are in pedestal step resolution. After you haveoptimized your Targeting (TRIM settings above) and have verified that you are able to accurately Target youmay wish to reduce the size of the Search pattern to avoid Tracking on an adjacent satellite (ie set to 50% ofits default value to only search half as far from your targeted position). Refer to your antenna manual.



5.12. SEARCH DELAYSets the time-out for automatic initiation of a search after the signal level drops below threshold. Units are inseconds. Range is 0-255 seconds. 0000 disables the automatic search feature. To manually update, pressthe LEFT arrow key to bring the cursor up under the least significant character. Continue to move the cursoruntil the desired character to be edited is underscored (selected). Use the UP or DOWN arrow keys toincrement or decrement the selected character.


5.13. SYSTEM TYPESelects system options according to the following table. Add together all the desired options to determine theproper entry. Refer to your antenna manual.

128 Reverse External Modem Lock input polarity (logic hi = lock)64 Enables LNB voltage output32 Display Relative in the Azimuth entry display16 Reverse blockage output logic (SW2 logic hi = blocked)8 Enable AFC in SCPC & NBIF Mode4 Auto SAT load after SEARCH failure2 Enable External Modem Lock Input (logic low = lock)1 Auto SAT load on “hot” RESET and ACU Power-Up




5-9

5.14. GYRO TYPESelects the type of gyro compass interface for ship turning compensation.

362 for 360:1 Synchro with S/D Converter360 for 360:1 Synchro with SBS Converter90 for 90:1 Synchro with S/D Converter36 for 36:1 Synchro with S/D Converter2 for Step-By-Step gyro or NMEA gyro1 for 1:1 Synchro with S/D Converter0 for No Gyro linear AZ Search Mode (No Heading input available)

If Gyro Type will be set to 0000, you must set SWEEP INC correctly and SATELLITE REFERENCE MODEMUST also be turned ON.



5.15. POLANG TYPEDefault setting is 0072 for Auto-Polarization mode. This automatically adjusts the polarization of the feed bycalculating the required polarization angle for the feed every 2 seconds based on ship's Latitude, Longitudeand the Satellite Longitude. If the feed is not properly oriented, the DAC-2200 will send a command to thePCU to adjust the feed. The system will function with all 24V DC motor driven feeds assemblies.

Set to 0009 (Manual Polarization) for troubleshooting or polarization alignment purposes OR if you desire tomanually adjust the polarization of the feed as the ship travels. Refer to your antenna manual.



5.16. POL OFFSETCCW 24V Polang pot position reference. May be incremented to adjust polarization while in Auto-Pol modeto optimize cross-pol isolation. Each increment equals one degree of polarization rotation (0038 = +8degrees), decrement below 30 for minus polarization (0022 = -8 degrees). Refer to Optimizing Auto-Polarization in the setup section of your antenna manual.



5.17. POL SCALE90 degree 24V Polang pot motion scale factor. Leave at factory default (0090).


5-10

5.18. Radiation Hazard and Blockage Mapping (AZ LIMIT parameters)The ACU can be programmed with relative azimuth sectors (zone) where blockage exists or where transmitpower would endanger personnel who are frequently in that area.

When the AZ LIMIT parameters are set to create this ZONE, several things happen when the antenna iswithin one of the zones:

1 Tracking continues as long as the AGC value is greater than the Threshold value. When the AGCvalue drops below Threshold the antenna will wait “Search Delay” parameter amount of time andthen re-target the satellite you targeted last (if 4 value is included in SYSTEM TYPE). Timeoutand re-target will continue until the satellite is re-acquired and tracking can resume.

2 “BLOCKED” will be displayed in the TRACKING window wherever the antenna is inside one of thezones.

3 A contact closure to ground (or an open if the blockage logic is reversed – See SYSTEM TYPE 16value) is provided on the SW2 terminal of the Terminal Mounting Strip. This Switch outputprovides a “Blocked”, “RF Radiation Hazard” or “FCC TX Mute” logic output. When the antennaexits the zone it will be on satellite, tracking and the SW2 logic contact closure will open.

The lower and upper limits are user programmable and are stored in NVRAM within the ACU parameter list.

AZ LIMIT 1 is the Lower Relative AZ limit (this is the more counter-clockwise of the two points, even if it isnumerically larger). AZ LIMIT 2 is the Upper Relative AZ limit (the more clockwise of the two points) forpattern mapping of ZONE 1.

CAUTION: The Lower Relative AZ limit is the more counter-clockwise of the twopoints (even if it is numerically larger) and the Upper Relative AZ limit is the moreclockwise of the two points. If you enter the two relative points incorrectly, Tracking andSearching will be adversely affected.

The ACU provides a contact closure to ground on the SW2 terminal of the Terminal Mounting Strip when theantenna is pointed within any one of the blockage/hazard zones or the system is searching, targeting,unwrapping or is mis-pointed by 0.5 degrees or more (FCC TX Mute function for Transmit/Receive systemsonly). The contact closure is a transistor switch with a current sinking capability of 0.5 Amp. Pressing the 5key when the TRACKING window is selected can simulate a manual BLOCKED condition to test SW2 logicoutput. UP arrow key is pressed to turn the simulated blocked condition OFF.

When used as simple “BLOCKED” logic output for a single Sea Tel antenna, this output could be used tolight a remote LED and/or sound a buzzer to alert someone that the antenna is blocked, and signal is lost.

In a “Dual Antenna” installation, this logic output(s) is used to control Dual Antenna Arbitrator panel of coaxswitch (or switches) to switch the source inputs to the matrix switch from Antenna “A” to Antenna “B”, andvice versa.

When used as simple “RF Radiation Hazard” logic output for a single Sea Tel TXRX antenna, this outputcould be used to suppress RF transmissions while the antenna is pointed where people would be harmed bythe transmitted microwave RF power output. The SW2 output would be interfaced to the satellite modem todisable the TX output signal from the Satellite TXRX Modem whenever the antenna is within the RFRadiation Hazard zone(s).

When used for “FCC TX Mute” logic output for a single Sea Tel TXRX antenna, this output could be used tosuppress RF transmissions whenever the antenna is mis-pointed 0.5 degrees or more, is blocked, searching,targeting or unwrapping. The SW2 output would be interfaced to the satellite modem to disable/mute the TXoutput signal from the Satellite TXRX Modem. When the mute condition is due to antenna mis-pointing, it willnot un-mute until the pointing error of the antenna is within 0.2 degrees. The default output is contactclosure to ground when the antenna is mis-pointed, therefore provides a ground to “Mute” the satellitemodem on the SW2 terminal of the Terminal Mounting Strip. If your satellite modem requires an open to“Mute”, refer to SYSTEM TYPE parameter 16 value to reverse the output logic from the ACU.


5-11

Programming instructions:

Determine the Relative AZ positions where blockage, or RF Radiation Hazard, exists. This may be done bymonitoring the received signal level and the REL display readings while the ship turns or by graphing theexpected blockage pattern. Elevation of the antenna in normal use also must be taken into consideration. AMast or other structure may cause blockage at low elevation angles, but may not cause blockage when theantenna is at higher elevation angles. Up to three zones may be mapped. Only zones which are neededshould be mapped (in AZ LIMIT pairs).

In unlimited antenna systems the Relative position of the antenna must have been calibrated by properlysetting the Home Flag Offset (HFO) value in the PCU. The HFO calibrates Relative to be 0000 when theantenna is pointed in-line with the bow of the boat/ship (parallel to the bow).

Convert the relative readings to AZ LIMIT values by multiplying by 10. Enter the beginning of the firstblockage region as AZ LIMIT 1 and the end of the region (clockwise direction from AZ LIMIT 1) as AZ LIMIT 2parameters in the ACU. All unneeded zone AZ LIMIT pairs must be set to 0000.

EXAMPLE 1 - One blockage Zone: A ship has a SeaTel antenna mounted on the center line of the ship. Amast is forward and an engine exhaust stack is aft. In thisexample the Stack does NOT block the satellite, only themast forward does. In this example zone 1 is caused bythe mast, zone 2 and zone 3 are not needed:

ZONE 1 begins (AZ LIMIT 1) at 352 degrees Relativeand ends (AZ LIMIT 2) at 8 degrees Relative. Multiplythese Relative positions by 10. Enter AZ LIMIT 1 valueof 3520 and AZ LIMIT 2 value of 0080.

To manually update, press the LEFT arrow key to bringthe cursor up under the least significant character.Continue to move the cursor until the desired character tobe edited is underscored (selected). Use the UP orDOWN arrow keys to increment or decrement theselected character.

Use the LEFT or RIGHT arrow key to move the cursor leftor right to select other characters to modify. When youare finished modifying press ENTER to execute the new value OR press NEXT to abort and exit setup mode.

5.19. AZ LIMIT 2AZ LIMIT 2 is the Upper Relative AZ limit for pattern blockage mapping. Refer to the previous information.



5.20. 5V OFFSET (Not in current software)CCW 5v Polang servo position reference. Refer to your antenna manual.




5-12

5.21. 5V SCALE (Not in current software)90 degree 5V Polang servo motion scale factor. Refer to your antenna manual.



5.22. TX Polarity (Not used in TVRO systems)Selects TX polarity override to disable Polang selection and coordinate TX polarities.

0 Indicates no TX polarity override2 (Default) Indicates Vertical desired TX polarity4 Indicates Horizontal desired TX polarity



5.23. SAVE NEW PARAMETERSPress RIGHT arrow and then press ENTER to save any recent changes in NVRAM for permanent storage. A“Parameters Saved” message will be displayed. If changes are made and not stored, they will still beeffective but will be lost when power is removed or when the RESET is pressed.

5.24. REMOTE COMMANDUse to enter diagnostic commands to the PCU. Refer to your antenna manual.

5.25. REMOTE MONITORUse to monitor the results of a diagnostic command which was sent to the PCU. Refer to your antennamanual.

5.26. REMOTE TILTAllows easy access to the tilt adjustment commands. Refer to your antenna manual. Press LEFT or RIGHTarrow bring up the cursor and begin adjustment. Press UP/DOWN arrow to adjust tilt forward and back.Press LEFT/RIGHT to adjust the tilt left and right. Press ENTER to restore normal system operation. (Youmust save the new tilt settings using the REMOTE PARAMETERS function below.

5.27. REMOTE PARAMETERSAllows easy access to the save remote parameters command sequence. Press RIGHT arrow and then pressENTER to save the parameters in the remote PCU's NVRAM. A “Parameters Saved” message will bedisplayed.

5.28. REMOTE UPLOADUsed to upload new software into PCU.

DAC-2200 Antenna Control Unit Functional Testing

6-1

6. Functional TestingIf not already ON, Turn ON the Power switch on the front panel of the ACU.

6.1. (OPTIONAL) TSC-10 Touch Screen Controller ChecksRefer to the functional testing chapter of the TSC-10 manual for check to perform.

6.2. ACU / Antenna System Check1 Press RESET on the ACU front panel to initialize the system. Verify the display shows "SEA TEL

INC - MASTER" and the ACU software version number. Wait 10 seconds for the display tochange to "SEA TEL INC - REMOTE" and the PCU software version number. If the displayshows "REMOTE INITIALIZING” wait for approximately 2 minutes for the antenna to completeinitialization and report the Antenna Model and PCU software version. If “REMOTE NOTRESPONDING" is displayed, refer to the Troubleshooting Section of this manual.

2 Press the NEXT key repeatedly to display the Ship, Satellite, Antenna and Status menudisplays. This verifies that the displays change in the correct response to the keys.

6.3. Latitude/Longitude Auto-Update checkThis verifies that the GPS position information is automatically updating..

1 Press the NEXT key repeatedly to display the Ship menu. Press ENTER to access edit modeand view the current Latitude value.

2 Press the LEFT arrow key to bring the cursor up under the ones digit, press UP and then hitENTER. The display should immediately show a latitude value one degree higher, but then willbe overwritten within several seconds (back to the previous value) by the GPS engine.

3 This test does not need to be repeated in the Longitude menu.

6.4. Ship Heading – Gyro Compass Following CheckThis verifies that the Heading display is actually following the Ships Gyro Compass.

1 Press the NEXT key repeatedly to display the Ship menu. If the boat is underway, monitor theHeading value to verify that the display changes in the correct response to the Gyro Compassinput (Heading value should always be exactly the same as the Gyro Compass repeater value).

2 If the boat is NOT underway, loosen the mooring lines enough to allow the ship to turn a fewdegrees at the pier. Monitor the Heading value to verify that the display changes in the correctresponse to the Gyro Compass input (Heading value should always be exactly the same as theGyro Compass repeater value).

Functional Testing DAC-2200 Antenna Control Unit

6-2

6.5. Azimuth & Elevation DriveThis verifies that the antenna moves in the correct response to the keys.

1 Press the NEXT key several times to display the Antenna menu.

2 Press the Tracking key to toggle Tracking OFF. Press the UP arrow key repeatedly and verifythat the antenna moves up in elevation.

3 Press the DOWN arrow key repeatedly and verify that the antenna moves down in elevation.

4 Press the RIGHT arrow key repeatedly and verify that the antenna moves up in azimuth.

5 Press the LEFT arrow key repeatedly and verify that the antenna moves down in azimuth.

6.6. Four Quadrant Tracking TestThis verifies that the antenna moves in the correct response to the keys, that Tracking is signaling correctlyand that the Tracking commands are being carried out (antenna drives to peak).

1 Press the NEXT key several times to display the Antenna menu.

2 Note the current peak ACG value. Press the Tracking key to toggle Tracking OFF, press the UParrow key repeatedly to move the antenna up in elevation until AGC falls about 100 counts.Turn Tracking ON and verify that the antenna moves back down in elevation and that the AGCrises to its’ previous high value.

3 Note the current peak ACG value. Press the Tracking key to toggle Tracking OFF, press theDOWN arrow key repeatedly to move the antenna down in elevation until AGC falls about 100counts. Turn Tracking ON and verify that the antenna moves back up in elevation and that theAGC rises to its’ previous high value.

4 Note the current peak ACG value. Press the Tracking key to toggle Tracking OFF, press theRIGHT arrow key repeatedly to move the antenna up in azimuth until AGC falls about 100counts. Turn Tracking ON and verify that the antenna moves back down in azimuth and that theAGC rises to its’ previous high value.

5 Note the current peak ACG value. Press the Tracking key to toggle Tracking OFF, press theLEFT arrow key repeatedly to move the antenna down in azimuth until AGC falls about 100counts. Turn Tracking ON and verify that the antenna moves back up in azimuth and that theAGC rises to its’ previous high value.

DAC-2200 Antenna Control Unit Functional Testing

6-3

6.7. Blockage Condition TestBlockage output function is used to modify the behavior of Tracking and Searching when there is a knownblockage zone. The ACU provides a contact closure to ground on the SW2 terminal of the TerminalMounting Strip when the antenna is pointed within any one of the blockage/hazard zones or the system issearching, targeting, unwrapping or is mis-pointed by 0.5 degrees or more (FCC TX Mute function forTransmit/Receive systems only). The contact closure is a transistor switch with a current sinking capabilityof 0.5 Amp. This logic output control signal is used for:

• When used as simple “BLOCKED” logic output for a single Sea Tel antenna, this output could be usedto light a remote LED and/or sound a buzzer to alert someone that the antenna is blocked, and signalis lost.

• In a “Dual Antenna” installation, this logic output(s) is used to control Dual Antenna Arbitrator panel ofcoax switches to switch the source inputs to the matrix switch from Antenna “A” to Antenna “B”, andvice versa.

• When used as simple “RF Radiation Hazard” logic output for a single Sea Tel TXRX antenna, thisoutput could be used to suppress RF transmissions while the antenna is pointed where people wouldbe harmed by the transmitted microwave RF power output. The SW2 output would be interfaced tothe satellite modem to disable the TX output signal from the Satellite TXRX Modem whenever theantenna is within the RF Radiation Hazard zone(s).

• When used for “FCC TX Mute” logic output for a single Sea Tel TXRX antenna, this output could beused to suppress RF transmissions whenever the antenna is mis-pointed 0.5 degrees or more, isblocked, searching, targeting or unwrapping. The SW2 output would be interfaced to the satellitemodem to disable/mute the TX output signal from the Satellite TXRX Modem. When the mutecondition is due to antenna mis-pointing, it will not un-mute until the pointing error of the antenna iswithin 0.2 degrees. The default output is contact closure to ground when the antenna is mis-pointed,therefore provides a ground to “Mute” the satellite modem on the SW2 terminal of the TerminalMounting Strip. If your satellite modem requires an open to “Mute”, refer to SYSTEM TYPEparameter 16 value to reverse the output logic from the ACU.

To Test the blockage function:

1 Press the NEXT key until you are at the Status menu. Press ENTER to access the Trackingmenu.

2 Press the RIGHT arrow key to bring up and move the cursor to the far right. Press the UP arrowto simulate a manual BLOCKED condition. BLOCKED will appear in the Tracking display.

3 Verify that SW2 terminal shorts to ground (or open circuit if you have SYSTEM TYPE configuredto reverse the output logic) and that the external alarms actuate OR the Dual AntennaArbitrator coax switches toggle (if antenna B is not blocked) OR the Satellite Modem TX isdisabled/muted.

4 Press the LEFT arrow key and then press the UP arrow key to turn the simulated blockedcondition OFF. BLOCKED will disappear from the Tracking display.

5 Verify that SW2 terminal is open circuit (or ground if you have logic reversed) and that the externalalarms deactivate OR the Satellite Modem TX is un-muted. The Dual Antenna Arbitrator coaxswitches should not toggle until you manually block Antenna B ACU.

6.8. Check ACU ParametersAssure that the parameters are set correctly (you may wish to record them).

Functional Testing DAC-2200 Antenna Control Unit

6-4


DAC-2200 Antenna Control Unit Maintenance & Troubleshooting

7-1

7. Maintenance & TroubleshootingBelow are the common adjustments, maintenance and troubleshooting that may be required in the lifetime of yoursystem.

If your system includes the OPTIONAL TSC-10 Touch Screen Controller, accomplish the Operator Testing andTroubleshooting in the Diagnostics screens.

7.1. General Cautions & Warnings


CAUTION - Allow only an authorized dealer to install or serviceyour Sea Tel System components. Unauthorized installation orservice can be dangerous and can invalidate the warranty.

7.2. Troubleshooting The ACUIf the OPTIONAL Touch Screen Controller is included in your system, use the Diagnostics section on thepanel to guide you through initial testing and troubleshooting of the system.

The following paragraphs list the problems you might encounter when performing the functional checkoutsteps in the previous section of this manual. Following the problems are suggestions of where to startlooking to solve the problem. Refer to the Drawings section of this manual, the Antenna manual and (ifincluded) the Touch Screen Controller manual for any/all pertinent block diagrams, schematics, wiringdiagrams and assembly drawings to aid in diagnosing any type of failure.

Try pressing RESET first and then in some cases you may want to turn Power OFF for a short period of timethen turn it back ON to see if that restores normal operation. Remember, with most Gyro Compass types youMUST enter the beginning Heading value EVERY time you power-up the ACU, before you will be able toretarget your desired satellite.

Verify that the SETUP PARAMETERS are set correctly (refer to the Setup section of this manual).

7.2.1. DAC-2200 display is blankThis indicates no power to the internal electronics. Assure that the front panel Power switch is ON.Check the AC line voltage, Power Cord and internal power supply fuses. Check the cables on the rearpanel of the ACU to assure they are properly connected. One at a time disconnect (and check displaystatus) the cables plugged into J1 M&C, then J_ NMEA, then J_ Gyro Compass to see if one of thesecables is shorting the ACU Power. Call your dealer to report this failure and arrange for repair service.

Maintenance & Troubleshooting DAC-2200 Antenna Control Unit

7-2

7.2.2. DAC-2200 Status displays "REMOTE NOT RESPONDING"This indicates a problem in the Antenna Control coax cable or communications modems in the ACUand/or Antenna PCU. Check the Antenna Control Cable connections at the J4 “Antenna” jack on the rearof the ACU and at the antenna pedestal inside the radome. If the connections are good, call your dealerto report this failure and arrange for repair service.

7.3. Troubleshooting Ships Gyro Compass problemsShips Heading display does not follow ships movement and/or you are getting frequent or constant ERRORCODE 0001. Determine the type of gyro compass that is used on the ship, assure that the GYRO TYPEparameter is set correctly (refer to the setup section of this manual) and then proceed to the step that lists thetroubleshooting for the correct type of Gyro Compass Signal.

7.3.1. STEP-BY-STEP1 Verify that the GYRO TYPE parameter is set correctly.

2 Observe the ERROR LED on the FRONT panel. IF it is illuminated, this indicates that an error wasdetected in the Step-By-Step input. Press RESET on the front panel. If the ERROR LED illuminatesagain, the problem is in the 4 connections to A, B, C and COMMON.

3 Check the connections to the Terminal Mounting Strip and to the ACU.

4 Measure the voltage between COMMON and A, B, and C. Each reading should either be near zero or35 to 70 VDC. If all three are zero, check the repeater fuses. If some read negative and some readpositive or if one reads an intermediate values the COMMON terminal is not properly connected.

5 If the Ship - Heading display is different from the actual Gyro heading, access the Heading entrymenu and key in the correct heading value (refer to the operation Ship menu section). Note thereading. After the ship has turned more than one degree, compare the new gyro heading with thereading on the display, if it has moved in the opposite direction then reverse connections A and B.Reset the ACU, put in the correct ship's heading again and verify that the display reading now followsthe Gyro heading.

7.3.2. 1:1 SYNCHROObserve the ship's heading display on the ACU. Compare its movement with that of the ship. If it doesnot move at all go to step 1. If it moves but in the wrong direction (even if it does not display the correctheading) go to step 2. If it moves in the correct direction but does not display the correct heading go tostep 3. The gyro compass connects to the Terminal Mounting Strip on TB3 R1, R2, S1, S2 and S3.


1 The Ships Heading display does not change when the ship changes direction. Using amultimeter read between R1 and R2. It should read 115 VAC. If it does not then a fuse is blownat the gyro repeater or there is an open between the repeater and the ACU. Read between S1and S2, S2 and S3 and finally S3 and S1. They should all read between 0 and 90 VAC. Thevoltage level will change as the ship turns. If one reading is very close to 0 volts wait until theship has made a major change in heading and then check voltage again. If the reading is stillvery low there is a problem in the line between the gyro repeater and the ACU or a problem inthe gyro repeater itself.

2 The display changes in the direction opposite of the movement of the ship. Switch thesecondary leads S1 and S2. Caution: there is 90 VAC between them! Verify that when the ship

DAC-2200 Antenna Control Unit Maintenance & Troubleshooting

7-3

changes direction the display shows change in the same direction. If the direction is correct butthe heading is incorrect go to step C.

3 The ship's heading display does not indicate the correct heading. If the display is off by 60, 180or 300 degrees, this indicates that R1 and R2 are reversed. Reverse R1 and R2 and recheckthe heading display. If the display is off by 120 or 240 degrees, this indicates that S1, S2 and S3are in the right order but off by one place. Note their positions and carefully move theconnections one position over (S1 to S2, S2 to S3, and S3 to S1). This action will offset thedisplay by 120 degrees. Check if the display now reads correctly. If not move all three leadsone more time in the same direction as last time. Verify that the ship's heading is correct.

7.3.3. 360:1 SynchroObserve the ship's heading display on the ACU. Compare its movement with that of the ship. If it doesnot move at all go to step 1. If it moves but in the wrong direction (even if it does not display the correctheading) go to step 2. If it moves in the correct direction but does not display the correct heading go tostep 3. The gyro compass connects to the Terminal Mounting Strip on TB3- R1, R2, S1, S2 and S3.


1 The Ships Heading display does not change when the ship changes direction. Using amultimeter read between R1 and R2. It should read 115 VAC. If it does not then a fuse is blownat the gyro repeater or there is an open between the repeater and the ACU. Read between S1and S2, S2 and S3 and finally S3 and S1. They should all read between 0 and 90 VAC. Thevoltage level will change as the ship turns. If one reading is very close to 0 volts wait until theship has made a major change in heading and then check voltage again. If the reading is stillvery low there is a problem in the line between the gyro repeater and the ACU or a problem inthe gyro repeater itself.

2 The display changes in the direction opposite of the movement of the ship. Switch thesecondary leads S1 and S2. Caution: there is 90 VAC between them! Verify that when the shipchanges direction the display shows change in the same direction. If the direction is correct butthe heading is incorrect go to step C.

3 If the ship's heading is different than the bridge, select the HDG function in the SHIP displaymode by pressing the SHIP key 4 times. Key in the correct heading using the numeric keys andpress ENTER.

7.4. Display Offsets / Optimizing TargetingIf the antenna does not target to within +/- 1.0 degrees of the satellite actual Elevation and Azimuth location ofthe desired satellite, the EL & AZ TRIM parameters need to optimized. The is because the targeted positionsmay be different than the calculated look angles due to mechanical installation or antenna alignment offsets.

Targeting should have been optimized when the system was installed and should not need to be re-adjustedin normal operation. However, you will need to re-evaluate the elevation trim if the antenna has been re-balanced.

You may correct the displayed positions to optimize targeting by following the procedure described in theMaintenance section of your antenna pedestal manual.

Maintenance & Troubleshooting DAC-2200 Antenna Control Unit

7-4

7.5. Pedestal Control Unit ConfigurationIf the power up display of the ACU says SEA TEL – REMOTE “xx04 VER 1.xx” the PCU is not configured fora specific Antenna Series or MODEL number. The configuration information that is unique to each pedestaltype is stored in a Non Volatile Random Access Memory (NVRAM) in the PCU enclosure. If the PCU isreplaced or the NVRAM in the PCU should become corrupt, the PCU must be re-configured to operate withthe pedestal it is installed on. The default configuration for the PCU is model “xx04”. In this configuration theLevel Cage will be driven normally but the PCU will not drive any of the three torque motors to preventdamage to the unknown pedestal. To configure the PCU refer to the Maintenance section of your antennapedestal manual.

DAC-2200 Antenna Control Unit Technical Specifications

8-1

8. Technical SpecificationsThe technical specifications for the DAC-2200 ACU and some of the specifications for general Below Decks are:

8.1. DAC-2200 Antenna Control UnitThe technical specifications for the DAC-2200 ACU are:

8.1.1. GeneralPhysical Dimensions: Rackmount: 1.75" x 17" x 14"Input Voltage: 110/220 VAC, 50/60 HzPower Requirements: 160 Watts maximum (including the stabilized antenna pedestal

and TSC-10 Touch Screen Controller)Fuses: 2 Amp 110v input, both lines fused

1 Amp 220v input, both lines fused

8.1.2. Front PanelStatus Indicator Display: 6 LED enunciators for Tracking, Searching, Target, Power,

Initializing, and ErrorAlpha Numeric Display: 2 Line 20 Character Alpha NumericNext Button Cycles display between Ship, Satellite, Antenna, and Status4-Position Keypad Cycles cursor Up / Down / Left / RightEnter ButtonReset ButtonControls: AC Power On/Off

8.1.3. Rear PanelConnectors:

J1 “Gyro Compass” 25 pin female D-SubminiatureJ2 “NMEA” RS-422 Serial I/O 9 pin male D-SubminiatureJ3 “M&C” RS-422 Serial I/O 9 pin female D-SubminiatureJ4 “Antenna” Control RF and

Pedestal DC Power Type F femaleJ6 “RF IN” Tracking Receiver

IF Input Type F femaleJ7 “AC Input Power” IEC receptacle with power cord

8.1.4. J4 “Antenna” Pedestal InterfaceCommunications Parameters: 9600 Baud, 8 bits, No parity, 1Stop BitInterface Protocol: Full Duplex FSK Modulated RS422 at 70 KHz (TX) & 120 KHz

(RX)Antenna Power: 30 Volts DCInterface Connector: Type F female

Technical Specifications DAC-2200 Antenna Control Unit

8-2

8.1.5. J3 “M&C” Aux Serial Interface for TSC-10 Touchscreen Control PanelCommunications Parameters: 9600 Baud, 8 bits, No parity, 1Stop BitInterface Protocol: Optically Isolated RS-422/RS232Interface Connector: DE9S

8.1.6. J2 “NMEA” InterfaceCommunications Parameters: 4800 Baud, 8,N,1Interface Protocol Optically isolated RS-422/RS232Interface Connector DE9PNMEA GPS Sentence: xxGLL typically GPGLL or LCGLLNMEA Heading Sentence: xxHDx typically HCHDM or HCHDT

8.1.7. DVB Compliant Tracking ReceiverInternal Satellite Identification Receiver

Input Range -85 to -35 dBm typicalSensitivity 30 mV / dB typicalBandwidth Selectable 7.5-30 MHz in DVB Mode, 333 KHz in SCPC Mode or

125 KHz in NBIF with AFC mode.Tuning range 950 to 2150 MHz in 1 MHz increments in DVB Mode, 125 KHz

increments in SCPC or 62.5 KHz increments in NBIF mode.Polarity switching 13 VDC output to select Vertical OR RHCP polarity.

18 VDC to output select Horizontal OR LHCP polarityBand Switching: 22kHz continuous tone output to select High band, No tone to

select Low band.Satellite ID Network ID for DVB signals. QPSK demodulator and FEC

decoder lock for DSS, or DVB without NID (forced NID).QPSK Demodulator 3000 to 30000 baud (ksps)FEC Decoder 1/2, 2/3, 3/4, 5/6, 6/7, 7/8, Automatic, SCPC or NBIF.Pipeline Decoder DVB or DSS compatible.

8.2. TSC-10 Touch Screen Control Panel (Optional)Dimensions 12.78 inches wide x 9.25 inches tall x 1.62 inches deepInterfaces DB9 for Serial Data and DC power from ACU, BNC for Video

Input, RJ45 network connectionOperating System Embedded LinuxTouchscreen Size 10.4 inches diagonal, 4:3 aspect ratioDisplay Resolution SVGABrightness 300 Nits

DAC-2200 Antenna Control Unit Technical Specifications

8-3

8.3. Terminal Mounting Strip

8.3.1. Synchro Interface:Connectors 5 screw terminal connectionsInput Voltage Level 36-110 VDC, 400 or 60 hertzSynchro Ratios 1:1, 36:1, 90 or 180:1 and 360:1 with Synchro-Digital converter

360:1 with Synchro-SBS converterImpedance: 1 Mohm

8.3.2. SBS InterfaceConnectors 4 screw terminal connectionsInput Voltage Level 20-90 VDCInterface Otpo-Isolated,Polarity Auto switchingRatio 6 steps per degreeImpedance: 10 Kohm

8.3.3. Control Interface

8.3.3.1. External AGCExternal AGC or Satellite Modem Lock Input. The logic of the external Satellite Modem Lockinput can be reversed in the SYSTEM TYPE parameter.

Connections 2 screw terminal connections (Ext AGC and GND)Voltage Level: 0-5 VDCImpedance: 1 Mohm

8.3.3.2. SW1 Local Band Select OutputControl local (BDE) band select switch(s) or tone generator(s).

Connections 1 screw terminal connection (SW1)Control Level: Low Band = OPEN circuit and High Band = SHORT to ground

(current sink of 0.5 amps max) controlled by MODE –TRACKING – Band Selection.

8.3.3.3. SW2 Blockage / TX Mute OutputBlockage output to Dual Antenna Arbitrator coax switch panel OR TX Mute output to SatelliteModem for RF radiation hazard and/or FCC compliance. The logic level of this output can bereversed in the SYSTEM TYPE parameter.

Connections 1 screw terminal connection (SW2)Control Level: Not Blocked or mispointed = OPEN circuit, Blocked or

mispointed = SHORT to ground (current sink of 0.5 amps max).

8.3.4. NMEA InterfaceThis interface allows external GPS or NMEA Heading input and GPS (GPGGA) output from some antennasystems.Connections 4 Screw terminal connections (RX+ & RX- input and TX+ & TX-

output)

Technical Specifications DAC-2200 Antenna Control Unit

8-4

8.4. Environmental ConditionsThe following requirements apply to equipment installed in weather protected locations.

Temperature 0 to 40 degrees CHumidity Up to 100% @ 40 degrees C, Non-condensing

8.5. Cables

8.5.1. DAC-2200 AC Power CableVoltage: 110 or 220 volts ACPower: 160 Watts maximum (including the stabilized antenna pedestal

and TSC-10 Touch Screen Controller)

8.5.2. Antenna Control CableCoax Please refer to the “Antenna L-Band IF Coax Cables” section of

the specification chapter of your antenna manual for coaxialcable recommendations.

Connectors: Sealed Type F Male, each end

8.5.3. IF Signal CablesType: Please refer to the “Antenna L-Band IF Coax Cables” section of

the specification chapter of your antenna manual for coaxialcable recommendations.

Connectors: Sealed Type F Male, each end

8.5.4. SBS/Synchro Gyro Compass Interface Cable (Customer Furnished)Type: Multi-conductor, ShieldedNumber of wires 4 Conductors for Step-By-Step Gyro, 5 Conductors for SynchroWire Gauge: 18 AWGInsulation: 600 VAC

8.5.5. Audio / Video cablesCustomer supplied. Connects the DSS receiver outputs to you video monitor, TV, or stereo system.

DAC-2200 Antenna Control Unit Drawings

9-1

9. DrawingsThe drawings listed below are provided as a part of this manual for use as a diagnostic reference.

9.1. DAC2200 Antenna Control Unit DrawingsDrawing Title

122342_G DAC-2200 Rackmount General Assembly 9-3122759_C DAC-2200 Chassis Wiring Diagram 9-6116685_A2 ACU Terminal Mounting Strip Schematic 9-7122709_A M&C Interface Cable Diagram, DAC to Touch Panel 9-8

Drawings DAC-2200 Antenna Control Unit

9-2


FIND QTY PART NO DESCRIPTION REFERENCE DESIGNATOR

SINGLE LEVEL MFG BILL OF MATERIAL

REV

1 1 122299 ENCLOSURE, RACK-MOUNTEA G

2 1 122300 LID, DAC-2200 ENCLOSUREEA D1

3 2 122302 BRACKET, AUX. SERIAL PORT ADAPTEREA C

5 1 120385-2 BRACKET, LID, ACU ASS'YEA X1

6 1 122655 COVER, POWER SUPPLY, DAC-2200EA D

7 1 122445 FRONT PANEL ASS'Y, DAC-2200EA X1

8 1 119667-5 POWER ENTRY MODULE, 120V, 3AEA A

9 1 122307 DVB RECEIVER ASS'Y, DAC-2200EA B

10 1 122338-2 PCB ASS'Y, FSK MODEM, BDE, 120KHzEA D3

11 1 122332 PCB ASS'Y, ACU W/ DVB, DAC-2200EA B

12 1 113747 PCB ASS'Y, AUX SERIAL PORTEA G2

13 1 122654 PCB ASS'Y, CONSCAN WITH REMOTE SUEA C

14 1 119828 PCB ASS'Y, GP32 ADAPTEREA C

15 1 122634 PCB ASS'Y, POWER SUPPLY REMOTE SEEA A

16 1 114836 PCB ASS'Y, S/D CONVERTER, 12 BITEA A

17 1 123046-1 CABLE ASS'Y, DC POWEREA A1

18 1 119668-7 POWER SUPPLY, SWITCHING 24V, 3.4A EA A2

19 1 112646-13 PCB ASS'Y, DC-DC CONVERTEREA A1

21 1 122660-2 HARNESS ASS'Y, AC ENTRY, SINGLEEA A

23 1 122659 CABLE ASS'Y, CROSS-OVEREA C

24 1 112918-12 CABLE ASS'Y, RIBBON, 20 PINEA B

25 1 120740 CABLE ASS'Y, DVB RECEIVEREA A

26 1 116589-3 CABLE ASS'Y, DUAL RESETEA B

27 1 116669-13 CABLE ASS'Y, D-SUB, 9-PIN, 13 IN.EA B

28 1 122704 CABLE ASS'Y, DUAL AUX. SERIAL, DAC-22EA B1

29 1 122657 CABLE ASS'Y, FSK MODEMEA A

30 1 123070 DECAL, HIGH VOLTAGE WARNINGEA

41 10 110941-3 SCREW, JACK, 4-40 X 5/16EA B

42 6 114588-106 SCREW, PAN HD, PHIL, 4-40 x 1/4, S.S.EA

COMMON 122342

DAC-2200, RACKMOUNT ASS'Y

H2REVDRAWING NUMBERPROD FAMILY

12-Oct-05EFF. DATE SHT 1 OF 2

FIND QTY PART NO DESCRIPTION REFERENCE DESIGNATOR

SINGLE LEVEL MFG BILL OF MATERIAL

REV

43 11 114583-005 NUT, HEX, 4-40, S.S.EA


45 2 114576-144 SCREW, FLAT HD, PHIL, 6-32 x 1/4, S.S.EA


47 20 114580-007 WASHER, FLAT, #6, S.S.EA

48 6 114583-007 NUT, HEX, 6-32, S.S.EA

49 2 119967 NUT, HEX, PANEL, 3/8-32EA

50 2 119952-031 WASHER, STAR, INTERNAL TOOTH, 3/8, SEA A1

51 2 122569-3642 STANDOFF, HEX, M-F, 6-32 X .25 OD X 1 1/EA

55 1 120090-18 MICRO ASS'Y, NMEAH SERIAL REF ITEM 12EA

56 1 120090-20 MICRO ASS'Y, CONSCAN SERIAL REF ITEM 13EA

58 1 120090-17 MICRO ASS'Y, 12-BIT SDC REF ITEM 16EA

59 1 122815 SOFTWARE, GP32 ADAPTER, DAC-2200 A REF ITEM 14EA 5.11

60 1 123187 DC FAN ASS'YEA A

61 8 114576-112 SCREW, FLAT HD, PHIL, 4-40 x 5/8, S.S.EA

62 8 114580-005 WASHER, FLAT, #4, S.S.EA

63 8 114581-005 WASHER, LOCK, #4, S.S.EA

64 1 123411 COVER, FSK MODEM, DAC-2200EA B

65 2 120452-32 SCREW, RND HD, PHIL, 6-32 X 3/8, BLACKEA


67 1 110203-17 STANDOFF, HEX, M/F, 6-32 X .25 OD X .25, EA

68 8 119961-007 NUT, HEX, SMALL PATTERN, 6-32, S.S.EA

COMMON 122342

DAC-2200, RACKMOUNT ASS'Y

H2REVDRAWING NUMBERPROD FAMILY

12-Oct-05EFF. DATE SHT 2 OF 2

DAC 2200, RACKMOUNT ASS'Y

122342 H2

NOTES, UNLESS OTHERWISE SPECIFIED:

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SHIP G

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95 - 250 VAC

REFERENCE DRAWINGS:

AA

M&C

NM

EA

MSF

CABLE ASS'Y, DAC TO TOUCH PANEL

122709 A

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