hiseasnet maintenance visit report - sssg,...

Completed by (Name/Signature): ____________________________________ Date: _________

HiSeasNet Maintenance Visit Report

Ship Visited: RV Knorr

Ship Location/Port: Woods Hole Massachusetts

Date(s) of work: September 17, 18 , 2007

Work performed by: Karl Kapusta

Visit Purpose: General Maintenance

The purpose for the trip was to perform a general maintenance check on the Seatel antenna system.


Maintenance Checklist Antenna Equipment (ignore SeaTel/Ship-specific points with * for fixed antennas) Initials Action Notes/Discussion

KK Take photo of radome exterior * Complete

KK Verify air conditioner is in working order, repair as

needed *

AC power to Air Conditioner was turned

off

KK Confirm/Set final air conditioner temperature set point

(85 deg F) *

Not Checked

KK Inspect or change air conditioner filter * Complete - cleaned filter

KK Visual inspection of radome (cracks, abrasions, caulk,

leaks, excessive grime, etc.), repair as needed *

Complete – no visible damage or leaks.

Very minor dirt & grime accumulation on

outer radome surface

KK Visual inspection of radome base, legs, and connection

to ship (rust, warping, etc.), repair as needed *

Complete – some rust on base legs but no

immediate attention required – same as last

visit in March of 2007

KK Take photo of dome/hub interior Complete

KK Perform SeaTel or Vertex service bulletin

upgrades/repairs

N/A

KK Inspect reflector, repair as needed Complete – reflector is in good condition.

Some scratches on rear surface from

contact with inverter mounting plates

attached to the antenna pedestal

KK Check antenna balance, adjust as needed * Complete – antenna re-balance was not

required

KK Inspect antenna equipment/frame for water or rust,

repair as needed

Complete frame is clean with no rust

visible

KK Inspect antenna equipment/frame for loose weights and

hardware, repair as needed *

Complete – all weights tight and secure

KK Lube/grease/treat any joints as necessary N/A

KK Inspect antenna equipment and wiring harness for loose

cables, repair as needed

Complete – all wires and harnesses tight &

secure

KK Verify power level to pedestal/motors Complete

KK Verify pedestal breaker works, repair as needed Complete - operational

KK Verify acceptable antenna/controller Power-On Self

Test (POST)

Complete

KK Sweep antenna through entire Az and El ranges Complete

KK Take photo of rack gear front Complete

KK Record DAC/controller parameters Complete – see attached

KK Verify DAC parameters are accessible, correct, and

saved *

Complete – see attached

KK Verify that GPS inputs to DAC function (if GPS is

operational) *

Complete – ship has two NMEA sources

KK Verify that gyro inputs to DAC function (if gyro is

operational) *

Complete – ship still has two gyros

available to DAC they need to stay

calibrated with each other to maintain Trim


Initials Action Notes/Discussion

value consistencies

KK Verify correct conscan or dishscan settings, adjust as

needed *

Complete – Dishscan OK

KK Verify reasonable blackout zone, adjust as needed * Complete – no blackout zones

programmed

KK Verify reasonable search limits or safety stops for given

location and satellite, adjust as needed

Complete – None used

KK Check Az/El trim values, correct as needed to get

longitude search close *

Complete – Re-Checked

KK Take photo of rack gear rear Complete

KK Inspect cabling and connectors behind and around rack

gear, repair as needed

Complete

KK Locate spares kit. Verify completeness of the kit, note

missing parts. *

Complete – see attached list

KK Upgrade SeaTel/controller firmware with maintenance

releases as necessary

Complete – N/A

KK Upgrade old ships with Conscan to Dishscan as needed

(Revelle, Melville, and Thompson)

Complete – N/A

KK Verify antenna will sweep full elevation range of

motion(-15 - +115 degrees physically)

Complete - Verified

KK Verify antenna will sweep full elevation pointing (0 –

90 degrees) when commanded by DAC

Complete - Verified

KK Verify antenna will do a full Azimuth sweep physically

at the lowest physical elevation

Complete – battery inverter plates need to

be trimmed to avoid scratching the rear

surface of the reflector at lowest Elevation

settings

KK Verify antenna will do a full Azimuth sweep at the

lowest pointed elevation when commanded by the DAC

Complete - Verified

KK Verify antenna frame lines up with and will safely bump

against all rubber stops should it reach the end of its

range of motion

Complete – No Adjustment Needed

Codan RF Equipment Initials Action Notes/Discussion

KK Take photo of converter panel Complete

KK Verify converter is not in an undue alarm state Complete

KK Verify power levels at power supply (48 VDC, and 110

VAC). Record VDC and VAC

Complete

53 VDC–no change from last report

117 VAC–no change from last report

KK Inspect RF coax cables and connectors, repair as needed Complete

KK Verify amplifier cooling fan functions Complete

KK Verify amplifier is not being overdriven, correct as

needed

Complete

KK Locate and test RS-422/RS-232 adapter used with

converter, modify pinouts so it is not needed, or verify

Complete – cable was re-pinned to RS232

operation no adaptor required



that it is not needed as is. Note status.

KK Locate and test DB-9/MIL serial cable that talks directly

to converter

Complete

KK Locate spare LNA Complete

KK Record settings (include serial number and wattage for

amp, serial number for converter, and amplifier output

type)

Complete – See Attached

Comtech Modem Equipment Initials Action Notes/Discussion

KK Verify settings are accessible, correct, and saved Complete

KK Verify modem locks on the correct signal, adjust as

needed

Complete

KK Visually inspect transmit signal directly for clean signal Complete

KK Verify expected Eb/No values for given location Complete – approx. 9.5 dBm

KK Record settings Complete – See Attached

KK Upgrade firmware as necessary (at least Rev 1.30) Complete – not required

KK Replace 5V PSU power cable if needed Complete – not required


Cisco Router Equipment Initials Action Notes/Discussion

KK Verify cables and connectors are snug and screwed in,

repair as needed

Complete

KK Verify serial cable is a CAB-530MT with Comtech

Cisco adapter and modem is in RS-422 mode

Complete

KK Verify that green connect light on serial card is lit when

modem is locked up

Complete

KK Verify router survives a power cycle and can route

traffic within 15 minutes of turning on while connected.

Notify techs that they may want to save router settings!!

Complete

Rack Equipment


KK Inspect rack conditions for proper rack gear cooling,

lighting, wiring, etc. (Earth station: Verify lights and

A/C work)

Complete

KK Check and record rack air conditioner set point Complete – Computer room is cool but no

thermostat for air conditioner

Overall


KK Take photos of ship/dome placement Complete

KK Check with ship techs/crew for overall impression of

equipment performance and possible problem areas

Complete

KK Locate spares kit (with help from techs) and verify all

SeaTel spares and one LNA exist. Note discrepancies.

Complete

KK Verify spectrum analyzer shows proper picture of TX

and RX carriers

Complete

KK Comment on or correct previous maintenance report

issues that were pointed out

Complete


Discussion

General

Overall, the equipment is clean and in good working order. The radome has very minor dirt and grime. The radome

interior is clean and dry with no evidence of water leakage.

The radome base legs are in the same condition as the last visit in March of this year (2007). The legs show some

rust, but are not in need of immediate attention or repair. Sanding and repainting is recommended at the ship’s next

scheduled port maintenance.

The Inverter Mounting Plates are located inside the radome and are mounted on the pedestal legs. Under usual

conditions these plates are of no concern. However, they could cause some damage to the rear of the reflector in if

power is lost in rough weather. Some minor scrapes have already been noted. The corners of the plates should be

trimmed back to avoid any further damage to the reflector.

System Operation

The crew reported some tracking problems, and loss of tracking during rapid turns or very rough seas. While

checking the DAC parameters it was noted that the STEP INTEGRAL parameter of the DAC was set 0000, and

the AZ & EL STEP SIZES were set to 0003. The crew stated that they had experimented with these settings and

that these provided the best tracking performance of the antenna. The usual STEP SIZE settings for Dishscan are

“0000”. During the maintenance visit the STEP SIZES were returned to zero (“0000”). This improved the Eb/No

value on the Comtech modem by approx. 1.5 dBm. However, the crew was told that if further tracking issues

occurred they could reset the STEP SIZE parameters to “0003” and report any problems.


Knorr Spare Parts

Item QTY Part Number Description Notes

1. 1 115444-1 Rev N5 PCU Assembly PCU was replaced – original was returned to the Knorr after inspection by Seatel – no fault found

by Seatel

2. 1 122208-1 Rev B Level Cage Unit was replaced with spare – original was repaired by Seatel and returned to the Knorr

3. 1 113746 Rev B Aux Serial Port Adaptor “Conscan”

4. 1 113746 Rev B Aux Serial Port Adaptor “NMEAH”

5. 1 None Home Flag Assembly

6. 1 116311 Sprocket

7. 3 115352-472 Metal Pin

8. 1 116325 Sprocket

9. 1 119041-3 Belt Kit

MISSING BELT a) 1423907-14537 Missing

b) 116430-17025

c) 116903-04925

MISSING BELT d) 116903-11537 Missing

e) 116903-10937

10. 4 None 250V, 2 amp Fuses

11. 1 LNA C-Band LNA

12. 2 116577 Sprocket

13. 1 116024-3 Rev J2 Shielded Polang Relay

14. 1 116000-1 Rev I Servo Amp

15. 1 None BLDC Motor, 12VDC, 4.1 amps

16. 1 117319-10 Loctite 271

17. 1 116070-1 Rev G 25 foot PCDAC Cable

18. 1 None PCDAC Software Floppy Disk

19. 1 None Power Cord

20 1 None Shuko Style Power Cord

21 1 08-05301-002 Laptop-to-Converter Communications cable

22 1 None LNA-to-Codan Converter RF cable w/ “N” connectors


Photos

RV Knorr

September 17, 18, 2007

Radome


RV Knorr


Radome Base Leg


RV Knorr


Radome Base Legs & Hardware


RV Knorr


Radome Interior

Air Conditioner and Battery UPS Inverter Plates


RV Knorr


Codan Transceiver Front Panel


RV Knorr


Below Decks Equipment - Front View


RV Knorr


Below Decks Equipment – Side View - 1


RV Knorr


Below Decks Equipment Side View - 2


RV Knorr


Below Decks Equipment General Location


HiSeasNet Satellite Equipment

Configuration

Ship: R/V Knorr

Date: 17, 18 Sept 2007

Location: Woods Hole, MA Satellite: Intelsat AOR

Uni

t

Setting Description Setting Display Setting Value Notes

SeaTel Digital Antenna Controller (DAC) Model DAC-97

(Faceplate reads

TAC-92)

Antenna system Seatel

9797 2.4m Circular Polarized w/ 40 watt C-

Band SSPA amplifier Serial Number 6198 PCU version 2.06

Firmware Version 3.31m AGC (Normal, On signal) 2000 Value when antenna is

peaked up on signal AGC (Normal, Off Signal) 1480

Value of noise when

antenna is not on satellite Latitude LAT 42 N Woods Hole, MA

Longitude LON 71 W Woods Hole, MA Heading HDG 254 Woods Hole, MA

Satellite SAT 307 E Intelsat AOR at 307 E Threshold THRS 1603 Antenna Controller locked

to hub carrier Intermediate Frequency IF 65.852 MHz Shore-to-ship signal

frequency to track Azimuth AZ 153.2 Woods Hole, MA

Elevation EL 39.3 Woods Hole, MA Relative Azimuth REL 127.7 Relative to bow of the ship

Elevation Trim EL TRIM -0032 In 1/10 of a degree

Azimuth Trim AZ TRIM 0013 HFO set to 11 degrees Auto Threshold AUTO THRESH 0128 In counts

Elevation Step Size EL STEP SIZE 0000 Azimuth Step Size AZ STEP SIZE 0000

Step Integral STEP INTEGRAL

0000 “0000” is DAC setting for Dishscan operation

Search Increment SEARCH INC 0010


Search Limit SEARCH LIMIT 0100 Search Delay SEARCH DELAY 0015

Step Delay STEP DELAY 0002 System Type SYSTEM TYPE 0013 Controller set for auto

search upon power failure or system reset

Gyro Type GYRO TYPE 0002 Set for NMEA information string from ship's

gyrocompass Polarization Angle Type POLANG TYPE 0009 N/A not used for circular

polarized systems Polarization Offset POL OFFSET 0030 N/A - not used on circular

polarized antennas Polarization Scale POL SCALE 0090 N/A - not used on circular

polarized antennas Azimuth Blackout Limit 1 AZ LIMIT 1 0000 Does not transmit or try to

search in the blackout zone

Azimuth Blackout Limit 2 AZ LIMIT 2 0000 Does not transmit or try to search in the blackout

zone Transmit Polarity TX POLARITY 0002

Home Flag Offset HFO 0000

Codan Power Amplifier

(PA)

Transceiver Serial

Number

H0396 70 MHz Transceiver

SSPA Serial Number G1399 40 watt C-Band

Transmit Frequency TX Freq. 6320 Converted transmit center frequency

Receive Frequency RX Freq. 4095 Converted receive center frequency

Transmit Attenuation TX Atten 10 dB Receive Attenuation RX Atten 0 dB Setting was changed from

10 dB at last visit – this adjustment changed the

THRS & AGC levels but did not change system

performance LNA Fault Control Faults: LNA Enabled

SSPA Fault Control Faults: Fan Enabled Fan Fault Control Faults: SSPA Enabled

IF Impedance Impedance 50 Ohms IF Frequency IF Freq. 70 MHz


TX Cable Compensation Cable Comp N/A Converter Temp

Compensation

Conv Comp

Type

5700AVG

SSPA Temp

Compensation

SSPA Comp

Type

5720-40

SSPA Mode SSPA Mode Codan

Reference Override Ref. Override Disabled Packet Protocol Packet Protocol CODAN

Packet Address Packet Addr. 0 (00H) Power Up Mode Power Up Last State

TX Power level into SSPA -20 dBm

Comtech CDM-550 Satellite Modem

(In CONFIG menu)

Serial Number 041779514 Firmware 1.34 Modem Firmware

Average Eb/No 9.5 dB Energy/Bit over noise (aka Signal Quality)

Transmit Modulation TX:MOD 3/4 - QPSK Transmit Frequency TX:FREQ 65.5450 MHz Ship TX frequency to Hub

Station Transmit Data Rate TX:DATA 96.000 kbps

Transmit Forward Error Correction

TX:FEC TURBO 3/4 Q

Transmit Power Output Mode

TX:ON/OFF RTI

Transmit Power Level TX:PWR:MANUAL

-18.0 dBm

Transmit Scrambler TX:SCRAM ON Transmit Clock TX:CLK INTERNAL Modem set to Internal

clocking Transmit Spectral

Inversion

TX:TSI OFF

Receive Modulation RX:MOD ¾ QPSK

Receive Frequency RX:FRQ 65.8525 MHz Receive Data Rate RX:DATA 180.000 kbps

Receive Forward Error Correction

RX:FEC TURBO 5/16 BPSK

Receive Acquisition Sweep Range

RX:ACQ +/- 10 kHz

Receive Descrambler RX:DESCRAM ON Receive Clock RX:CLK OFF

Receive Buffer RX:BUF BUF DISABLED Receive Spectral

Inversion

RX:RSI OFF

Eb/No Alarm Level RX Eb/No 0.1 dB


Framing FRAMING TRANSPARENT Interface Type INTFC RS422 Serial interface to router

Remote Control REMCONT LOCAL Automatic Gain Control

Alarm

MASK:AGC ACTIVE

Eb/No Alarm MASK Eb/No ACTIVE

Receive All 1s Alarm MASK:RX-AIS MASKED Buffer Slip Alarm MASK:BUF-

SLIP

ACTIVE

Transmit All 1s Alarm MASK:TX-AIS MASKED

Input Frequency Impedance

IMPED 50 OHMS

Logging Interval 00 minutes "00" equals Inactive

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