comb a

ML-MV Equipment Manual

ML-MV QE Copyright - refer to title page ENU Status: 2-0-0

ML-MV PDH Digital Microwave System

EQUIPMENT MANUAL

The information contained herein is the responsibility of and is approved by the following, to whom all enquiries should be directed in the first instance:

TXBU Comba Telecom

This is an unpublished work the copyright in which vests in Comba International ("Comba"). All rights reserved. The information contained herein is confidential and the property of Comba and is supplied without liability for errors or omissions. No part may be reproduced, disclosed or used except as authorised by contract or other written permission. The copyright and the

foregoing restriction on reproduction and use extend to all media in which the information may be embodied.



0.1 CONTENTS

Section Page

0.1 CONTENTS...........................................................................................................................2 0.2 INDEX TO FIGURES AND TABLES .....................................................................................4 0.3 HISTORY...............................................................................................................................7 0.4 ISSUE CONTROL .................................................................................................................8 0.5 REFERENCE ........................................................................................................................9 0.6 GLOSSARY OF TERMS .....................................................................................................10 0.7 SAFETY NOTICES AND ADMONISHMENTS....................................................................11 0.8 SERVICING POLICY AND RETURN OF EQUIPMENT .....................................................12 0.9 READERS COMMENTS .....................................................................................................14 1 GENERAL INFORMATION .................................................................................................15 2 SYSTEM CONFIGURATION...............................................................................................16 3 KIT OF PARTS ....................................................................................................................17 4 IDU DESCRIPTION.............................................................................................................18 4.1 IDU FRONT PANEL DESCRIPTION ..................................................................................18 4.2 IDU LED DISPLAY ..............................................................................................................20 4.3 75Ω 17E1 BNC PANEL AND 120Ω TRIBUTARY ADAPTER.............................................21 4.3.1 75Ω 17E1 BNC PANEL .......................................................................................................21 4.3.2 120Ω TRIBUTARY ADAPTER ............................................................................................21 5 ODU DESCRIPTION...........................................................................................................22 6 ANTENNA INTRODUCTION...............................................................................................23 7 PRE-INSTALLATION ..........................................................................................................24 7.1 WARNINGS AND ALERTS .................................................................................................24 7.2 SITE PLANING....................................................................................................................25 7.3 GOODS INWARDS INSPECTION ......................................................................................26 7.4 PREPARATION...................................................................................................................26 7.5 LIGHTNING PROTECTION ................................................................................................26 7.6 ANTENNA ASSEMBLY.......................................................................................................26 7.7 FEEDER CABLE ASSEMBLY.............................................................................................26 7.8 MOISTURE PROOFING .....................................................................................................27 7.9 DRIP-LOOP.........................................................................................................................27 7.10 SYSTEM GROUNDING ......................................................................................................27 7.11 ANTENNA CONNECTIONS................................................................................................27 8 IDU INSTALLATION............................................................................................................28 8.1 RACK/CABINET MOUNTING THE IDU..............................................................................28 8.2 RACK/CABINET MOUNTING 75Ω 17E1 BNC PANEL / 120Ω TRIBUTARY

ADAPTER............................................................................................................................28 8.3 IDU CABLE CONNECTION ................................................................................................29 8.3.1 IDU CONNECTOR DEFINITION.........................................................................................29 8.3.2 GROUNDING THE IDU.......................................................................................................32 8.3.3 POWERING THE IDU .........................................................................................................32 8.3.4 CONNECTING THE CIT CABLE ........................................................................................32 8.3.5 CONNECTING PAYLOAD CABLE ASSEMBLY.................................................................33 8.3.6 CONNECTING TRIBUTARY CABLE..................................................................................35 8.3.7 CONNECTING OTHER CABLES .......................................................................................36 9 ANTENNA INSTALLATION.................................................................................................37 9.1 KIT OF PARTS ....................................................................................................................37 9.2 TOOLS.................................................................................................................................37 9.3 ANTENNA INSTALLATION PROCEDURE.........................................................................37 9.4 MW PARABOLIC ANTENNA INSTALLATION....................................................................38 10 ODU INSTALLATON...........................................................................................................40 10.1 ODU INSTALLATION IN PROTECTED CONFIGURATION ..............................................40 10.1.1 ODU INSTALLATION TO ANTENNA..................................................................................40 10.1.2 SURGE PROTECTOR INSTALLATION .............................................................................43 10.1.3 CONNECTING IF CABLE ...................................................................................................43 10.1.4 WATERPROOFING MEASURES .......................................................................................43



10.2 ODU INSTALLATION IN PROTECTED CONFIGURATION ..............................................44 10.2.1 COUPLER INSTALLATION TO COUPLER........................................................................44 10.2.2 ODU INSTALLATION..........................................................................................................46 10.2.3 SURGE PROTECTOR INSTALLATION .............................................................................47 10.2.4 IF CABLE CONNECTION ...................................................................................................48 10.3 INSTALLED ODU ................................................................................................................49 11 ANTENNA ALIGNMENT .....................................................................................................50 11.1 ANTENNA PRE-ALIGNMENT.............................................................................................50 11.2 ANTENNA PAIR IDENTIFICATION ....................................................................................51 11.3 ANTENNA FINE-ALIGNMENT............................................................................................52 11.4 ANTENNA ADJUSTMENT ..................................................................................................53 11.4.1 ANTENNA AZIMUTH ADJUSTMENT.................................................................................53 11.4.2 ANTENNA ELEVATION ADJUSTMENT.............................................................................54 12 ML-MV IDU FUNCTIONALITY ............................................................................................55 12.1 CHANNEL SELECTION......................................................................................................55 12.2 TRANSMIT POWER CONTROL FUNCTION .....................................................................55 12.3 AUTOMATIC GAIN CONTROL (AGC)................................................................................55 12.4 DIGITAL SIGNAL PROCESSING (DSP) ............................................................................55 12.5 SIGNAL PROCESSING ......................................................................................................55 12.6 MONITORING AND NETWORK MANAGEMENT ..............................................................55 13 COMMISSIONING...............................................................................................................56 13.1 EQUIPMENT POWER-UP ..................................................................................................56 13.2 LAUNCH THE CIT...............................................................................................................56 13.3 CIT TOP MENU...................................................................................................................60 13.4 CIT CONTROL ....................................................................................................................62 13.5 ALARM MENU.....................................................................................................................63 13.6 NETWORK MENU...............................................................................................................65 13.7 ODU MENU .........................................................................................................................72 13.8 IDU MENU...........................................................................................................................80 13.9 LINK MENU .........................................................................................................................89 13.10 SYSTEM MENU ..................................................................................................................94 13.11 TEST MENU......................................................................................................................105 13.12 PERFORMANCE MENU...................................................................................................117 14 SET UP WORKING LINK..................................................................................................122 14.1 SETUP WORKING LINK FOR 1+0 CONFIGURATION....................................................122 14.2 SETUP WORKING LINK FOR 1+1 CONFIGURATION....................................................123 15 SYSTEM TESTING ...........................................................................................................124 15.1 E1 TRIB LOCAL LOOP .....................................................................................................124 15.2 IF LOOP.............................................................................................................................124 15.3 E1 TRIB SYSTEM LOOP ..................................................................................................125 15.4 LOOP-BACK E1 TESTING................................................................................................125 15.5 PRACTICAL E1 TESTING ................................................................................................126 16 MAINTENANCE ................................................................................................................127 17 APPENDICES....................................................................................................................128 17.1 APPENDIX A: 1.2M ANTENNA CONTRUCTION.............................................................128 17.2 APPENDIX B: FACTORY DEFAULT PARAMETERS ......................................................135 17.3 APPENDIX C: RMA (RETURN MATERIAL AUTHORIZATION) FORM...........................136



0.2 INDEX TO FIGURES AND TABLES

Figure 1: Unprotected configuration system.........................................................................................16 Figure 2: Protected configuration system-hot standby .........................................................................16 Figure 3: Protected configuration system-frequency diversity..............................................................16 Figure 4: 17E1 1+0 ...............................................................................................................................18 Figure 5: 17E1 1+1 ...............................................................................................................................18 Figure 6: 17E1+ETH 1+0 ......................................................................................................................19 Figure 7: 17E1+ETH 1+1 ......................................................................................................................19 Figure 8: 75Ω 17E1 BNC panel ............................................................................................................21 Figure 9: 120Ω tributary adpater...........................................................................................................21 Figure 10: ODU appearance.................................................................................................................22 Figure 11: Rack mounting the IDU........................................................................................................28 Figure 12: Powering the IDU.................................................................................................................32 Figure 13: Payload cable assembly ......................................................................................................33 Figure 14: Lablled E1 wire ....................................................................................................................33 Figure 15: “R1” wire ..............................................................................................................................34 Figure 16: Remove nut and spring washer...........................................................................................34 Figure 17: Installed “R1” wire................................................................................................................34 Figure 18: Installed payload cable assembly........................................................................................34 Figure 19: E1 tributary cable.................................................................................................................35 Figure 20: Connecting E1 tributary cable .............................................................................................35 Figure 21: U-shape bracket installation 1 .............................................................................................38 Figure 22: U-shape bracket installation 2 .............................................................................................38 Figure 23: Attach antenna to mounting bracket....................................................................................39 Figure 24: Polarization adjustment .......................................................................................................39 Figure 25: Installed MW Antenna..........................................................................................................39 Figure 26: Alignment key on antenna ...................................................................................................40 Figure 27: Alignment hole on ODU.......................................................................................................40 Figure 28: Position ODU onto antenna.................................................................................................41 Figure 29: Hook locking buckles...........................................................................................................41 Figure 30: Tighten locking buckles .......................................................................................................41 Figure 31: Vertical polarization .............................................................................................................42 Figure 32: Horizontal polarization .........................................................................................................42 Figure 33: Install surge protector ..........................................................................................................43 Figure 34: Connecting the IF cable to IDU ...........................................................................................43 Figure 35: ODU coupler appearance....................................................................................................44 Figure 36: Align antenna polarization ...................................................................................................44 Figure 37: Secure coupler onto antenna ..............................................................................................45 Figure 38: Alignment key on coupler / alignment hole on ODU............................................................46 Figure 39: Secure ODU onto coupler ...................................................................................................46 Figure 40: ODU attachment ..................................................................................................................46 Figure 41: Surge protector ....................................................................................................................47 Figure 42: Right angle adaptor .............................................................................................................47 Figure 43: Surge protector installation..................................................................................................47 Figure 44: IF cable connection..............................................................................................................48 Figure 45: Loosen nuts for azimuth adjustment....................................................................................53 Figure 46: Coarse/fine azimuth adjustment ..........................................................................................53 Figure 47: Loosen nuts for elevation adjustment..................................................................................54 Figure 48: Launch the CIT terminal – step 2 ........................................................................................56 Figure 49: Launch the CIT terminal – step 3 ........................................................................................57 Figure 50: Launch the CIT terminal – step 4 ........................................................................................57 Figure 51: Launch the CIT terminal – step 5 ........................................................................................58 Figure 52: Launch the CIT terminal – step 6 ........................................................................................58 Figure 53: Launch the CIT terminal – step 7 ........................................................................................59 Figure 54: 17E1 CIT top menu..............................................................................................................60 Figure 55: 17E1+ETH CIT top menu ....................................................................................................61 Figure 56: Current alarms .....................................................................................................................63 Figure 57: Mask/unmask alarm-1 .........................................................................................................64 Figure 58: Mask/unmask alarm-2 .........................................................................................................64



Figure 59: Network menu......................................................................................................................66 Figure 60: ETH set ................................................................................................................................66 Figure 61: Link PPP enable-1 ...............................................................................................................67 Figure 62: Link PPP enable-2 ...............................................................................................................67 Figure 63: Link PPP IP-1.......................................................................................................................68 Figure 64: Link PPP IP-2.......................................................................................................................68 Figure 65: IP route menu ......................................................................................................................69 Figure 66: Route table set.....................................................................................................................69 Figure 60: Add route-1 ..........................................................................................................................70 Figure 60: Add route-2 ..........................................................................................................................70 Figure 69: Trap IP setting-1 ..................................................................................................................71 Figure 70: Trap IP setting-2 ..................................................................................................................71 Figure 71: Reading ODU information-1 ................................................................................................73 Figure 72: Reading ODU information-2 ................................................................................................73 Figure 73: Reading ODU Temperature-1 .............................................................................................74 Figure 74: Reading ODU Temperature-2 .............................................................................................74 Figure 75: SSPA on/off-1 ......................................................................................................................75 Figure 76: SSPA on/off-2 ......................................................................................................................75 Figure 77: TX power reading/setting-1 .................................................................................................76 Figure 78: TX power reading/setting-2 .................................................................................................76 Figure 79: ODU RSL reading-1.............................................................................................................77 Figure 80: ODU RSL reading-2.............................................................................................................77 Figure 81: Tx frequency reading/setting-1 ............................................................................................78 Figure 82: Tx frequency reading/setting-2 ............................................................................................78 Figure 83: Rx frequency reading-1 .......................................................................................................79 Figure 84: Rx frequency reading-2 .......................................................................................................79 Figure 85: IDU information reading-1 ...................................................................................................81 Figure 86: IDU information reading-2 ...................................................................................................81 Figure 87: IDU temperature reading-1..................................................................................................82 Figure 88: IDU temperature reading-2..................................................................................................82 Figure 89: Traffic capacity setting-1......................................................................................................83 Figure 90: Traffic capacity setting-2......................................................................................................83 Figure 91: Tx IF frequency reading/setting-1........................................................................................84 Figure 92: Tx IF frequency reading/setting-2........................................................................................84 Figure 93: Rx IF frequency reading-1 ...................................................................................................85 Figure 94: Rx IF frequency reading-2 ...................................................................................................85 Figure 95: LAN setting-1 .......................................................................................................................86 Figure 96: LAN setting-2 .......................................................................................................................86 Figure 97: User output setting-1 ...........................................................................................................87 Figure 98: User output setting-2 ...........................................................................................................87 Figure 99: Link ID setting-1...................................................................................................................90 Figure 100: Link ID setting-2.................................................................................................................90 Figure 101: RSL threshold reading/setting-1 ........................................................................................91 Figure 102: RSL threshold reading/setting-2 ........................................................................................91 Figure 103: ATPC enable-1 ..................................................................................................................92 Figure 104: ATPC enable-2 ..................................................................................................................92 Figure 105: ATPC trigger level reading/setting-1..................................................................................93 Figure 106: ATPC trigger level reading/setting-2..................................................................................93 Figure 107: System mode reading/setting-1.........................................................................................95 Figure 108: System mode reading/setting-2.........................................................................................95 Figure 109: Protection mode reading/setting-1.....................................................................................96 Figure 110: Protection mode reading/setting-2.....................................................................................96 Figure 111: Protection switch mode reading/setting-1 .........................................................................97 Figure 112: Protection switch mode reading/setting-2 .........................................................................97 Figure 113: Demux switch setting-1......................................................................................................98 Figure 114: Demux switch setting-2......................................................................................................98 Figure 115: ODU switch setting-1 .........................................................................................................99 Figure 116: ODU switch setting-2 .........................................................................................................99 Figure 117: Buzzer enable-1...............................................................................................................100 Figure 118: Buzzer enable-2...............................................................................................................100



Figure 119: System time reading/setting-1 .........................................................................................101 Figure 120: System time reading/setting-2 .........................................................................................101 Figure 121: Factory setting reverting-1...............................................................................................102 Figure 122: Factory setting reverting-2...............................................................................................102 Figure 123: MPU reseting-1................................................................................................................103 Figure 124: MPU reseting-2................................................................................................................103 Figure 125: System resetting-1...........................................................................................................104 Figure 126: System resetting-2...........................................................................................................104 Figure 127: E1 trib local loop-1 ...........................................................................................................106 Figure 128: E1 trib local loop-2 ...........................................................................................................106 Figure 129: E1 trib system loop setting-1 ...........................................................................................107 Figure 130: E1 trib system loop setting-2 ...........................................................................................107 Figure 131: LAN line loop setting-1.....................................................................................................108 Figure 132: LAN line loop setting-2.....................................................................................................108 Figure 133: LAN system loop setting-1...............................................................................................109 Figure 134: LAN system loop setting-2...............................................................................................109 Figure 135: IF loop setting-1 ...............................................................................................................110 Figure 136: IF loop setting-2 ...............................................................................................................110 Figure 137: RF loop setting-1 .............................................................................................................111 Figure 138: RF loop setting-2 .............................................................................................................111 Figure 139: Single tone enable-1........................................................................................................112 Figure 140: Single tone enable-2........................................................................................................112 Figure 141: PRBS settings-1 ..............................................................................................................113 Figure 142: PRBS setting-2 ................................................................................................................113 Figure 143: PRBS status-1 .................................................................................................................115 Figure 144: PRBS status-2 .................................................................................................................115 Figure 145: Demux switch counter resetting-1 ...................................................................................118 Figure 146: Demux switch counter resetting-2 ...................................................................................118 Figure 147: ODU switch counter resetting-1.......................................................................................119 Figure 148: ODU switch counter resetting-2.......................................................................................119 Figure 149: Export logs-1....................................................................................................................120 Figure 150: Export logs-2....................................................................................................................120 Figure 151: Clear logs-1 .....................................................................................................................121 Figure 152: Clear logs-2 .....................................................................................................................121 Figure 153: E1 trib local loop ..............................................................................................................124 Figure 154: IF loop ..............................................................................................................................124 Figure 155: E1 trib system loop ..........................................................................................................125 Figure 156: Loop-back test connection diagram ................................................................................125 Figure 157: Practical test connection diagram....................................................................................126 Table 1: IDU LED display-1 ..................................................................................................................20 Table 2: IDU LED display-2 ..................................................................................................................20 Table 3: ODU description......................................................................................................................22 Table 4: MW antenna availability ..........................................................................................................23 Table 5: Description of payload cable assembly ..................................................................................33 Table 6: Keyboard instruction for CIT operation ...................................................................................62 Table 7: Alarm menu details .................................................................................................................63 Table 8: Network menu details .............................................................................................................65 Table 9: ODU menu details...................................................................................................................72 Table 10: IDU menu details ..................................................................................................................80 Table 11: Link menu details ..................................................................................................................89 Table 12: System menu details.............................................................................................................94 Table 13: Test menu details................................................................................................................105 Table 14: Performance menu .............................................................................................................117



0.3 HISTORY

Change No. ENU Details Of Change 1 1-0-0 Initial document released in Aug 2008.

2 1-1-0 Re-formatted the whole document and renamed the diplexer as coupler in Dec 2008.

3 2-0-0 Updated with description of 17E1+ETH variant in Apr 2009



0.4 ISSUE CONTROL

Date 30 Aug 08

30 Dec 08

25 Apr 09

Section All all all all



0.5 REFERENCE

0.6.1 ML-MV-1001YH User Manual

Initial user manual released in Mar 2008.

0.6.2 NMS v2.0 QU 1-1-0 NMS user manual released in Jan 2008.



0.6 GLOSSARY OF TERMS

10Base-T 10Mbit/s Baseband Unshielded Twisted Pair Cable AGC Automatic Gain Control AIS Alarm Indication Signal ALM Alarm ATPC Automatic Transmit Power Control AUX Auxiliary Data Channel ADM Add/Drop Multiplexer ATM Asynchronous Transfer Mode BER Bit Error Rate BERT Bit Error Rate Tester CPU Central Processing Unit CCITT International Telephone and Telegraph consultative committee CIT Craft Interface Terminal DC Direct current DEM Demodulation DEMUX DeMutiplex ES Error Second E1 Framing specification for synchronous digital streams at 2.048Mbit/s. EOW Engineering order wire ETH Ethernet FTP File Transfer Protocol GND Ground IF Intermediate Frequency LAN Local Area Network LED Light-Emitting Diode LOS Loss of Signal MIB Management Information Base MSAIS Multiplex Section Alarm Indication Signal M&C Monitor and Control MDU Modem Unit MUX Multiplexer/Demultiplexer NMS Network management system ODU Outdoor Unit PDH Plesiochronous Digital Hierarchy QAM Quadrature Amplitude Modulation PSTN Public Switched Telephone Network RBER Remainder Bit Error Rate RF Radio Frequency RIM Replaceable Interface Module RMT Remote RLTS Received Level Threshold Second RSL Received signal level RSSI Received signal strength indication RSPI Radio Synchronous Physical Interface SDH Synchronous Digital Hierarchy SSPA Solid State Power Amplifier SNMP Simple network management protocol TCA Threshold Crossing Alarm TIM Trace Identifier Mismatch TX Transmitter



0.7 SAFETY NOTICES AND ADMONISHMENTS

This document contains safety notices in accordance with appropriate standards. In the interests of conformity with the territory standards for the country concerned, the equivalent territorial admonishments are also shown.

Any installation, adjustment, maintenance and repair of the equipment must only be carried out by trained, authorized personnel. At all times, personnel must comply with any safety notices and instructions.

Specific hazards are indicated by symbol labels on or near the affected parts of the equipment. The labels conform to international standards, are triangular in shape, and are colored black on a yellow background. An informative text label may accompany the symbol label.

Hazard labelling is supplemented by safety notices in the appropriate equipment manual. These notices contain additional information on the nature of the hazard and may also specify precautions.

Warning: These draw the attention of personnel to hazards which may cause death or injury to the operator or others. Examples of use are cases of high voltage, laser emission, toxic substances, point of high temperature, etc.

Alert: These draw the attention of personnel to hazards which may cause damage to the equipment. An example of use is the case of static electricity hazard.

Caution notices may also be used in the handbook to draw attention to matters that do not constitute a risk of causing damage to the equipment but where there is a possibility of seriously impairing its performance, e.g. by mishandling or gross maladjustment. Warnings and Cautions within the main text do not incorporate labels and may be in shortened form.



0.8 SERVICING POLICY AND RETURN OF EQUIPMENT

The repair of individual units and modules of this equipment is not considered practicable without factory facilities. It is, therefore, the policy of Comba whereby faulty units or modules are returned to the local agent for repair.

To enable an efficient, prompt after sales service to be provided for the diagnosis, repair and return of any faulty equipment, please comply with the following requirements.

Items to be sent for repair should be packaged so as to provide both electrostatic and physical protection and a Repair Material Authorization (a sample of this form is in the appendix) completed giving the required information.

This request must be included with the item for repair, items for repair should be sent to the nearest Comba office:

COMBA TELECOM SYSTEMS, LTD. Hong Kong Office Address: 611 East Wing, No. 8 Science Park West Avenue, Hong Kong Science Park, Hong Kong Tel: +852 2636 6861 Fax: +852 2637 0966 Email: [email protected] Singapore Office Address: 865 Mountbatten Road, Katong SC #05-43, Singapore 437844 Tel: +65 6345 4908 Fax: +65 6345 1186 Email: [email protected] Thailand Office Address: 3rd Floor, T. Shinawatra Building, 94 Sukhumvit Soi 23, Sukhumvit Road, Klongtoeynua, Wattana, Bangkok 10110 Tel: +66 2664 3440 Fax: +66 2664 3442

India Office Address: Suit No. 2, E-172, TSH House, Greater Kailash I, New Delhi 110048, India Tel: +91 11 5173 9997 / 8 Fax: +91 11 5173 9996 Email: [email protected] Sweden Office Address: Gustavslundsvagen 147, S- 167 51 Bromma, Stockholm, Sweden Tel: +46 8 25 38 70 Fax: +46 8 25 38 71 Email: [email protected] Brazil Sales Office Address: Avenida Engenheiro Luiz Carlos Berrini 1297, cj 122, 04571-090 São Paulo, Brazil Tel: +55 11 55050549 Fax: +55 11 55050549 ext 7 Email: [email protected] China Office Address: No.10, Shenzhou Road, Guangzhou Science City, Guangzhou, China Tel: +86 20 2839 0000 Fax: +86 20 2839 0136 Email: [email protected]



0.9 READERS COMMENTS

Whilst every endeavour is made to ensure the accuracy of this and all Comba documents, there is always the possibility that an inaccuracy or omission could occur.

In order that any amendment/remedial action can be carried out promptly, we would appreciate your co-operation in filling out and returning a photocopy of this customer reply sheet as soon as possible.

Customer Information: Name

Title

Company

Date

Address

Telephone Number

Customer Comments: Equipment title

ENU 2-0-0

Page number

Paragraph number

Line number

Figure number

Details of inaccuracies

Other comments

Submission Points:

E-mail: [email protected] Fax: +852-21166055

-End of section



1 GENERAL INFORMATION

Comba Digital Microwave System allows transmission links to be established rapidly and easily to meet a variety of transmission needs, brings cost savings and helps rapid network rollout. This solution comprises of: antenna, outdoor unit and indoor unit. ML-MV IDU can be easily upgraded from 1+0 mode to 1+1 mode by adding one more IF module which is hot swappable in operation. Traffic capacity is configurable between 4Mbit/s to 34 Mbit/s via Craft Interface Terminal (CIT). Two variants are available: 17E1 and 17E1 plus Ethernet payload. 75Ω 17E1 BNC panel and 120Ω tributary adapter are designed to achieve BNC (balanced) and RJ45 (unbalanced) interfaces respectively. ODU is designed to attach onto antenna directly, which effectively reduced RF loss for high quality transmitting. This documentation covers the installation and maintenance of ML-MV IDU (Indoor Unit), ODU (Outdoor Unit) and antenna for both 1+0 and 1+1 configurations.



2 SYSTEM CONFIGURATION

The following configurations are supported: Unprotected (1+0)

IDU ODU 1 f1 ODU 1 IDUTraffic

TX RX

f2

IF cable

IF cable Traffic

IDU ODU 1 f1 ODU 1 IDUTraffic

TX RX

f2

IF cable

IF cable Traffic

Figure 1: Unprotected configuration system Hot Standby (1+1)

ODU 1 f1 ODU 1

Traffic

TX RX

IF cable

IF cable

IDU

IF Module

1

IF Module

2

IDU

IF Module

1

IF Module

2ODU 2 ODU 2

IF cable

IF cable

f1

f1

TrafficODU 1 f1 ODU 1

Traffic

TX RX

IF cable

IF cable

IDU

IF Module

1

IF Module

2

IDU

IF Module

1

IF Module

2ODU 2 ODU 2

IF cable

IF cable

f1

f1

Traffic

Figure 2: Protected configuration system-hot standby Under hot standby mode, only one IDU is in operation at the transmitting end, the other one is standby (with transmitting function disabled), when error occurs, the active transmitter will be shut down and replaced with the standby IDU. At the receiving end, both two receivers and modulators are in operation. Two receivers will receive the same RF signal and then the two demodulators will demodulate the received signal. The better signal will be selected and exported. Frequency Diversity (1+1)

ODU 1 f1 ODU 1

TX RX

IF cable

IF cable

IDU

IF Module

1

IF Module

2

IDU

IF Module

1

IF Module

2ODU 2 ODU 2

IF cable

IF cable

f2

f1

f2

TrafficTraffic

ODU 1 f1 ODU 1

TX RX

IF cable

IF cable

IDU

IF Module

1

IF Module

2

IDU

IF Module

1

IF Module

2ODU 2 ODU 2

IF cable

IF cable

f2

f1

f2

TrafficTraffic

Figure 3: Protected configuration system-frequency diversity Under frequency diversity mode: the two channels are with the same signal resource. Data is distributed to two channels by a coupler, then be sent to its corresponding IDUs, both of the modulator and the transmitter are in operation. At the receiving end, two separate receivers and demodulators are receiving and demodulating signals from different channels. The signals from only one channel will be selected to export after signals being modulated into baseband signal. Space diversity is used in conjunction with hot standby or frequency diversity.



3 KIT OF PARTS

Qty.

Product Identifier Description 1+0 1+1

Note

BVV2.5 Grounding cable, 2m, yellow and green 2 2

OT2.5-6 Earth terminal 2 4

1-178128-2 Power supply cable, 5m, 2 x 0.75, black and red 2 4

MLHB13G-03 RF coupler 2

AD-NM/NFR Right angle adaptor 4

AN10MF70 Surge protector 4

ML-3101A SDH 1+1 protection cable 2

RS232 cable DB9, F-M, 2m 2 2

RSSI RSSI cable, BNC 2 2

Ethernet cable RJ45, 2.5m 2 2 ML-PA173401 / ML-PANEL-5802 120Ω tributary adpater / 75Ω 17E1 BNC panel 4 / 2 4 / 2

Payload cable assembly / tributary cable 17E1, DB78-BNC / DB78-DB78 4 / 2 8 / 4

TST-0023 EOW handse 2 2

RJ-11/R-11 EOW cable, 3m 2 2

Screwdriver Philips 2 2

14mm-17mm 4 4 Open Spanner

8mm-10mm 2 2

Optional

Test Report 1 1

ML-MV QE 2-0-0 This document 1 1



4 IDU DESCRIPTION

4.1 IDU FRONT PANEL DESCRIPTION

The ML-MV IDU capacity is programmable from 2E1 to 17E1 via CIT or NMS, figure below shows the ML-MV IDU front panel.

1 2 3 4 5 6

7 8 9 10 11 12

16 17

18

1 2 3 4 5 6

7 8 9 10 11 12

16 17

18

Figure 4: 17E1 1+0

1 2 3 4 5 6 16 17

127 8 9 10 11 18

13 14

15

Figure 5: 17E1 1+1 Following table is a description of ML-MV IDU front panel.

No. Interface Identifier

Visual appearance Description

1 AUX 9-pin D-type User auxiliary data channel 2 NMS RJ-45 Ethernet management port for NMS connection

3 User I/O 26-pin D-type User environment monitoring and remote control interface

4 USB Standard USB interface Backup equipment configuration to USB storage device

5 LED Indicators Diagnostic LEDs for identifying system working status 6 ODU ON Toggle Switch Power supply switch for ODU (A) 7 E1 TRIB1-17 78-pin D-type E1 signal 8 CIT 9-pin-D-type Used for local commissioning 9 Handset RJ-11 4-wire RJ11 interface

10 Ring Momentary Switch Voice EOW switch, is used to indicate to the remote IDU a request for communication

11 IF N-type For interconnection of IF cable to ODU (A) 12 LED Indicators Diagnostic LEDs for identifying system working status 13 IF N-type For interconnection of IF cable to ODU (B) 14 LED Indicators Diagnostic LEDs for identifying system working status 15 ODU ON Toggle Switch Power supply switch for ODU (B) 16 OFF/ON Rocker switch Power supply switch for IDU 17 POWER Polarized socket Input port for power supply unit 18 GND Ground Terminal Enclosure ground connection



2 431 5 6 16 17

127 8 9 10 11 18

2 431 5 6 16 17

127 8 9 10 11 18

Figure 6: 17E1+ETH 1+0

2 431 5 6 16 17

127 8 9 10 11 18

1314

15

2 431 5 6 16 17

127 8 9 10 11 18

1314

15

Figure 7: 17E1+ETH 1+1 Following table is a description of ML-MV IDU front panel.



1 USB Standard USB interface Backup equipment configuration to USB storage device

2 User I/O 26-pin D-type User environment monitoring and remote control interface

3 LAN1-LAN4 RJ45 IP data transmission 4 NMS RJ-45 Ethernet management port for NMS connection 5 LED Indicators Diagnostic LEDs for identifying system working status 6 ODU ON Toggle Switch Power supply switch for ODU (A) 7 E1 TRIB1-17 78-pin D-type E1 signal 8 CIT 9-pin-D-type Used for local commissioning 9 Handset RJ-11 4-wire RJ11 interface

10 Ring Momentary Switch Voice EOW switch, is used to indicate to the remote IDU a request for communication

11 IF N-type For interconnection of IF cable to ODU (A) 12 LED Indicators Diagnostic LEDs for identifying system working status 13 IF N-type For interconnection of IF cable to ODU (B) 14 LED Indicators Diagnostic LEDs for identifying system working status 15 ODU ON Toggle Switch Power supply switch for ODU (B) 16 OFF/ON Rocker switch Power supply switch for IDU 17 POWER Polarized socket Input port for power supply unit 18 GND Ground Terminal Enclosure ground connection



4.2 IDU LED DISPLAY

Label Description Color IDU FAULT Indicates an IDU fault. Red

RUN

Slow Blinking: IDU initialization in progress. Fast Blinking: IDU undergoing Main / Protection S/W synchronization. Constantly illuminating: IDU operating normally after initialization.

Green

Table 1: IDU LED display-1

Label Description Color

FAULT → ODU Indicates an ODU fault. Red

FAULT → IDU-ODU Indicates IF cable failure. Red

IF MODULE IF module is powered on. Otherwise, LED is off. Green

ACTIVE → RF RX In 1+1 mode, illuminates in the IDU connected to the ODU that is currently chosen as the active receiver. Otherwise, constantly lit.

Green

ACTIVE → RF TX (Reserved)

In 1+1 HS mode, illuminates in the IDU connected to the ODU that is currently transmitting. Otherwise, constantly lit.

Green

Table 2: IDU LED display-2

--End of section



4.3 75Ω 17E1 BNC PANEL AND 120Ω TRIBUTARY ADAPTER

75Ω 17E1 BNC panel and 120Ω tributary are designed to achieve balanced and unbalanced interfaces respectively.

4.3.1 75Ω 17E1 BNC PANEL

Figure below presents the appearance of 75Ω 17E1 BNC panel, which is designed to hold the tributary cable assembly in order to achieve the tributary IN/OUT interface.

The holes on each row are number coded from 1 to 17, the upper row is labelled for output, while the lower is for input.

Figure 8: 75Ω 17E1 BNC panel 4.3.2 120Ω TRIBUTARY ADAPTER

Figure below shows 120Ω tributary adpater which is designed to connect with IDU via a converting cableand achieve the RJ45 tributary IN/OUT interface.

Figure 9: 120Ω tributary adpater Table below is description of 120Ω tributary adpater front panel.



1 E1 TRIB1-17 78-pin D-type Connect with IDU E1 TRIB1-17 interface via a converting cable.

2 1---17 RJ45 RJ45 tributary IN/OUT interface



5 ODU DESCRIPTION

Figure below presents the appearance of ODU.

Figure 10: ODU appearance

Table 3: ODU description

Interface Identifier Appearance Description

Waveguide Port Connection between ODU and antenna GND Terminal post Enclosure ground connection RSSI BNC RSSI interface Locking Buckle Secure ODU onto antenna

IF Interface N-type N-type jack (female) for interconnection of the IF cable to the IDU

Waveguide Port

GND

RSSI Interface

IF Interface

Locking Buckle



6 ANTENNA INTRODUCTION

The Microwave Antenna is a parabolic antenna that consists of a reflector, feed and tower mount. Typically, there are two types of antenna exist: MW High Performance (HP) Parabolic Antenna and MW Standard Performance (SP) Parabolic Antenna. With additional shield and radome applied, the MW HP Parabolic Antenna is of higher efficiency, competent Front/Back Ratio as well as excellent anti-corrosion proofing properties. The MW antenna is mainly used for directing the RF energy into and out of the ODU in a particular direction. Comba provides a wide range of MW Parabolic Antennas with different size for all operating bands of our Comba product line. The table below list all antennas available by their radome size and frequency band.

Size (m) / Freq (GHz) 7 8 13 15 18 23

0.3 X X √ √ √ √

0.6 √ √ √ √ √ √

0.8 √ √ √ √ √ √

1.2 √ √ √ √ √ √

1.5 √ √ √ √ √ √

1.8 √ √ √ √ √ √

2.0 √ √ √ √ √ X

2.4 √ √ √ √ X X

3.0 √ √ √ √ X X

Table 4: MW antenna availability



7 PRE-INSTALLATION

7.1 WARNINGS AND ALERTS

Radio frequency energies There may be situations, particularly workplace environments near high- powered RF sources, where recommended limits for safe exposure of human beings to RF energy could be exceeded. In such cases, restrictive measures or actions may be necessary to ensure the safe use of RF energy.

High voltage The equipment have been designed and constructed as to prevent as far as reasonably practicable danger. Any work activity on or near equipment involving installation, operation or maintenance must be as far as reasonably free from danger.

Where there is a risk of damage to electrical systems involving adverse weather, extreme temperatures, wet, corrosive or dirty conditions, flammable or explosive atmospheres than the system must be suitably installed to prevent danger.

Protective earthing Equipment provided for the purpose of protecting individuals from electrical risk must be suitable for the purpose and properly maintained and used.

Handling precautions This covers a range of activities including lifting, lowering, pushing, pulling, carrying, moving, holding or restraining an object, animal or person. It also covers activities which require the use of force or effort such as pulling a lever, or operating power tools.

ESD Observe standard precautions for handling ESD-sensitive devices. Assume that all solid-state electronic devices are ESD-sensitive. Ensure use of a grounded wriststrap or equivalent while working with ESD-sensitive devices. Transport, store, and handle ESD-sensitive devices in static-safe environments.



7.2 SITE PLANING

Site considerations

When correctly installed, ODU is designed for outdoor operation. Temporary protection should be taken during installation or maintenance in an outdoor environment. The equipment must not be installed or maintained in bad weather (e.g. gale, storm, extreme temperatures and high humidity).

Installation location

Mounting surface shall be suitable to support the equipment weight as specified in the datasheet.

Environmental

Humidity can affect the reliability of the equipment. It is recommended to install the equipment in the location having stable temperature and un-restricted airflow.

Grounding requirement

Verify the equipment has been well grounded; this includes IDU, ODU and all cables connected. Ensure lightning protection for the antennas is properly grounded.

Manual handling

During transportation and installation, take necessary handling precautions to avoid potential physical injury to the installation related personnel and/or damages to the equipment.



7.3 GOODS INWARDS INSPECTION

Verify the number of packages received against the packing list.

Check all packages for external damage; report any external damage to the shipping carrier. If there is damage, a shipping agent should be present before unpacking and inspecting the contents because damage caused during transit is the responsibility of the agent.

Open and check each package against the packing list. If any items are missing. Contact Comba Telecom.

Do not remove items from antistatic packing until installation. If damage is discovered at the time of installation, contact the shipping agent.

The following items deserve for special attention:

Check and ensure all the accessories and installation tools on the packing list are included;

Check if the model number is consistent with the order. Pay attention to the working frequency and capacity;

Check if the antenna’s diameter and its working frequency is consistent with the order.

7.4 PREPARATION

Control measures should be in place before the customer starts working at heights. Listed below are the three levels of control measure available to protect customer from the risk of a fall, in order of preference, are: • Erecting a physical barrier • Providing personal fall protection • Measures to “catch” a falling person. 7.5 LIGHTNING PROTECTION

Observe installation location to ensure effective lightning protection is applied to the antenna. 7.6 ANTENNA ASSEMBLY

Antennas which have multiple components must be re-assembled carefully to ensure mechanical performance is achieved. 7.7 FEEDER CABLE ASSEMBLY

Take normal precautions when preparing and handling feeder cables and waveguides to ensure they are not damaged by their own weight. Cable should not be pulled with a radius less than that determined for the installed cable/waveguide. Due to limitation of side bearing pressure, it is recommended that larger radius bends be used. Inspect the cable/waveguide ends for small metal fragments, remove unwanted objects before each connector is installed. Always protect the cables and waveguides from damage, use cable clips where needed.



7.8 MOISTURE PROOFING

As an unpressurized antenna system, no dehydrators are required. Extreme care should be exercised with waveguides before and after installation to ensure that moisture does not enter the waveguide. Keep the waveguide dry while in storage with ends tightly capped. Connectors, and fittings, to be located outdoors should be made mechanically tight, and with any factory supplied sealing fittings installed. Moisture problems in antenna systems are usually traced back to connectors which have NOT been properly protected. 7.9 DRIP-LOOP

Comba recommends that every horizontal cable entry to the antenna feed forms a 'U' before its entry to equipment and antenna. Any accumulated water on the cable will drip down at the bottom of the loop and will not climb up to the installation. 7.10 SYSTEM GROUNDING

It is essential that the antenna system be properly grounded for safety and proper operation. 7.11 ANTENNA CONNECTIONS

The antenna has been designed for all cable/waveguide entries from the rear of the antenna feed assembly.



8 IDU INSTALLATION

8.1 RACK/CABINET MOUNTING THE IDU

The IDU is designed for installation in a standard 19” (486mm) rack or cabinet. The mounting tabs are attached onto IDU before shipping. Follow the steps below to mount the IDU onto rack/cabinet: Position the IDU at the desired rack mounting position. With four mounting screws, secure mounting tabs to the rack. The rack mounting of IDU is completed.

Figure 11: Rack mounting the IDU 8.2 RACK/CABINET MOUNTING 75Ω 17E1 BNC PANEL / 120Ω TRIBUTARY ADAPTER

The 75Ω 17E1 BNC panel / 120 Ω tributary adapter is designed for installation in a standard 19” (486mm) rack or cabinet. Refer to section 8.2 for details of rack/cabinet mounting 75Ω 17E1 BNC panel / 120 Ω tributary adapter.



8.3 IDU CABLE CONNECTION

The IDU is connected via the connectors located on the front panel. Hereinafter is the description on cable connections of the IDU.

8.3.1 IDU CONNECTOR DEFINITION

AUX Interface Communication mode: synchronous or asynchronous Bit Rate: synchronous 64kbits / asynchronous 19.2kbits Protocol: RS-232 or RS-422 Interface type: DB9

Pin Number RS-232 RS-422

1 NC NC 2 TXD(OUTPUT) TXD- (OUTPUT) 3 RXD(INPUT) RXD+ (INPUT) 4 Reserved Reserved 5 GND GND 6 Reserved Reserved 7 Reserved TXD+ (OUTPUT) 8 Reserved RXD- (INPUT) 9 Reserved Reserved

NMS interface Bit Rate: 10/100Base-TX, auto-negotiation Interface type: RJ45 ETH Interface Bit Rate: 10Mbit/s, 100Mbit/s, auto-negotiate

Pin Number 1 RX+ (Input) 2 RX- (Input) 3 TX+ (Output) 4 Reserved 5 Reserved 6 TX- (Output) 7 Reserved 8 Reserved



USER I/O Interface Input port: Single-ended input Output port: Voltage free relay output Interface Type: DB26

Pin Number Pin Number 1 Input 3 14 Reserved 2 GND 15 Reserved 3 Input 4 16 Reserved 4 Output 1C 17 Reserved 5 Output 1NC 18 Reserved 6 Output 1NO 19 GND 7 Output 3C 20 Input 1 8 Output 3NC 21 Output 4NO 9 Output 3NO 22 Output 4NC 10 Input 2 23 Output 4C 11 Reserved 24 Output 2NO 12 Reserved 25 Output 2NC 13 Reserved 26 Output 2C

CIT interface Bit Rate: 19200bit/s Data Bits: 8 Parity: None Stop Bits: 1 Flow Control: None Emulation: VT100 Protocol: RS-232 Interface type: DB9

Pin Number 1 Reserved 2 TXD (Output) 3 RXD (Input) 4 Reserved 5 GND 6 Reserved 7 Reserved 8 Reserved 9 Reserved



E1 Interface Bit Rate: 2048kbit/s ± 50ppm Code: HDB3 Impedance: 75Ω (unbalanced) / 120Ω (balanced) Interface type: DB78

Pin Signal Label Pin Signal Label Note 2 Tip 4 Tip 22 Ring

R1 24 Ring

R5

31 Tip 33 Tip 12 Ring

T1 14 Ring

T5


R2 63 Ring

R6


T2 53 Ring

T6

3 Tip 5 Tip 23 Ring

R3 25 Ring

R7


T3 15 Ring

T7


R4 64 Ring

R8


T4 54 Ring

T8

6 Tip 8 Tip 26 Ring

R9 28 Ring

R13


T9 18 Ring

T13


R10 67 Ring

R14


T10 57 Ring

T14

7 Tip 9 Tip 27 Ring

R11 29 Ring

R15


T11 19 Ring

T15


R12 68 Ring

R16


T12 58 Ring

T16


R17 21 Ring

T17

“R” stands for “Receive”; “T” stands for “Transmit”

EOW interface Interface type: RJ-22 Comba proprietary pin-out IF interface Interface type: N type



8.3.2 GROUNDING THE IDU

The IDU should be properly grounded before connecting any other cables to it. A ground terminal located on the IDU is used for grounding. This ground terminal must be electrically connected to the site earth ground using cable BVV 2.5.

8.3.3 POWERING THE IDU

A DC power cable is used for power supply to the ML-MV IDU through the power connector located on the front panel of the IDU. To connect the power cable to the power source, the following items must be noted. • Make sure the IDU power is OFF. • Connect the red wire to the “+“ terminal of the power source. • Connect the black wire to the “-” terminal of the power source. Before connecting the powered cable to the equipment, check and ensure the voltage and polarity meet the requirement with a multimeter.

Figure 12: Powering the IDU 8.3.4 CONNECTING THE CIT CABLE

The “CIT” interface of the IDU is designed to be connected with PC via a CIT cable to achieve the system commissioning through the CIT terminal locally. The CIT cable is a DB9-DB9 straight-through cable. Connect one end of the CIT cable to the “CIT” interface of the IDU, and another to the RS-232 port of the PC.

“-” side

“+” side



8.3.5 CONNECTING PAYLOAD CABLE ASSEMBLY

The figure below presents the payload cable assembly.

Figure 13: Payload cable assembly

Figure 14: Lablled E1 wire

Cable Type Description E1 signals A sum of 34 E1 wires for connecting with user facilities. The E1

wires are labelled and number coded from 1 to 17. The cables coded as “Rx” are for signal input, while as “Tx” are for signal output. The lable locates nearly to the BNC connector, see figure 15.

Grounding cable Ground terminal.

Table 5: Description of payload cable assembly Connect the end with DB78 connector of payload cable assembly to the “E1 TRIB1-17” interface on IDU, another end with a collection of E1 signals to the 75Ω 17E1 BNC panel, the 17 wires labelled as “Tx” are to be installed to the top row, while the 17 wires labelled as “Rx” to bottom row.



In order to make the tributary cable assembly installation easier, please install the “Rx” wires to the bottom row first, then install the “Tx” wires to the top row. Below take “R1” wire installation as an example: Locate the “R1” wire and the “IN 1” hole.

Figure 15: “R1” wire Remove nut and spring washer from “R1” wire.

Figure 16: Remove nut and spring washer Insert “R1” wire into “IN 1” hole, verify spring washer is applied before tigtening nut.

At this stage, “R1” wire is successfully installed onto the 75Ω 17E1 BNC panel.

Figure 17: Installed “R1” wire Follow steps above to finish the installation of the rest of wires.

Verify all the wires are correctly presented onto the 75Ω 17E1BNC panel.

Figure 18: Installed payload cable assembly

Nut

Spring washer



8.3.6 CONNECTING TRIBUTARY CABLE

DB78-DB78 tributary cable is designed to connect IDU with 120Ω tributary adapter, seen in figure below.

Figure 19: E1 tributary cable

To connect E1 tributary cable, connect one end to E1 interface on the IDU front panel, and another end goes to the E1 interface on the 120Ω tributary adapter.

Figure 20: Connecting E1 tributary cable



8.3.7 CONNECTING OTHER CABLES

For other cable, such as CIT cable and ETH cable, please refer to the table below that illustrates the connection details.

Cable/Connector Description Interface Location

AUX interface

DB9 cable

CIT interface

vEOW handset and cable

vEOW interface

NMS cable

NMS interface

USB flash disk

USB interface

--End of section



9 ANTENNA INSTALLATION

9.1 KIT OF PARTS

The antennas are shipped to site in a wooden container, for each antenna, all necessary mechanical fasteners have been pre-attached to form a pre-assembled antenna, other items are typically packed with the antenna include: • Ring spanner • Silicon sealant

The antenna assembly is made up of three main components: • Radome and feed assembly • Mounting Bracket • Pole mounting clamps

9.2 TOOLS

Philips screwdriver Open Spanner

9.3 ANTENNA INSTALLATION PROCEDURE

With the complete antenna packaging moved to the final installation site, exercise care in use the crowbar to open and remove the lid. Ample packaging materials protecting the antenna during shipment may be discarded with the packaging container at the end of the installation. The MW antenna is pre-assembled with the all mounting fixtures prior to shipment. Before commencing with pole mounting, user needs to unscrew and remove the screws and bolts. The antenna mounting rack can then be separated from the equipment in preparation for subsequent mounting tasks. Depending on antenna provided, it may be necessary to construct the antenna on site before installation. This section takes Φ0.3m/Φ0.6m antenna installation as an example. Refer to the appendices for Φ1.2m antenna installation.



9.4 MW PARABOLIC ANTENNA INSTALLATION

Locate and position the antenna onto the mounting pole, identify the U-shape bracket and assemble it for mounting to the pole. Hold the mounting rack with one hand, and mount two U-shape brackets onto upper and lower

pairs of M10 bolt with the other hand.

Figure 21: U-shape bracket installation 1

Verify spring washers and nuts are applied onto the two pairs of bolts before securing the pole mount component of the antenna.

Figure 22: U-shape bracket installation 2

U-shape bolt

M10 bolt



Attach the antenna to the mounting bracket. Insert the adjustment level and two M10 bolts and nuts and tighten them with a spanner to secure the installation of antenna.

Figure 23: Attach antenna to mounting bracket Align the antenna polarization by loosening the polarization adjustment bolts and rotate the feed

flange to the required orientation. Figure below shows the horizontal polarization, rotate 90 degrees, it achieves vertical polarization.

`

Figure 24: Polarization adjustment At this step, the MW Antenna is installed onto the mounting pole, seen as the following figure:

Figure 25: Installed MW Antenna

Polarization adjustment bolts

M10 bolt

Adjustment level



10 ODU INSTALLATON

10.1 ODU INSTALLATION IN PROTECTED CONFIGURATION

10.1.1 ODU INSTALLATION TO ANTENNA

The ODU is mounted directly onto the rear of the antenna. • Align antenna polarization (see section 9.4 for details of antenna polarisation alignment). • Align ODU onto antenna by matching the alignment holes on the ODU with the alignment keys on

antenna. See figures below.

Figure 26: Alignment key on antenna

Figure 27: Alignment hole on ODU

Alignment key

Alignment hole



• Attach ODU onto the rear of antenna and hook locking buckle (see figures below).

Figure 28: Position ODU onto antenna

Figure 29: Hook locking buckles • Latch the locking buckles.

Figure 30: Tighten locking buckles

Verify the waveguide port on ODU is connected properly with the feed flange on antenna before

tightening each lock buckle.

Locking buckle

Hook



Shown below, vertical polarization is indicated by an upward pointing arrow. Horizontal polarization is with the ODU rotated 90° clockwise.

Figure 31: Vertical polarization

Figure 32: Horizontal polarization



10.1.2 SURGE PROTECTOR INSTALLATION

A surge protector is provided for installation on the ODU to protect the IDU and ODU. Connect the one end of the grounding wire to the grounding point of the ODU and surge protector, fix another end to the grounding terminal of the building ground point.

Figure 33: Install surge protector

10.1.3 CONNECTING IF CABLE

This refers to the connection between ODU and IDU. Before connecting the IF cable, ensure that the IDU is powered OFF. Locate and connect the IF cable to the N-type connector of the installed surge protector, and the other end of the IF cable goes to the “IF” interface on the IDU.

Figure 34: Connecting the IF cable to IDU

10.1.4 WATERPROOFING MEASURES

After all the screws, bolts and nuts are tightened, seal the surge protector assembly and connector of the IF cable using silicone sealant and waterproof tape.

Surge protector

Grounding wire



10.2 ODU INSTALLATION IN PROTECTED CONFIGURATION

10.2.1 COUPLER INSTALLATION TO COUPLER

Figure below presents the appearance of Comba ODU coupler.

Figure 35: ODU coupler appearance A RF coupler is required to be installed for 1+1 system. • Align antenna polarization (see section 9.4 for details of antenna polarization alignment).

` Figure 36: Align antenna polarization

• Align and attach coupler onto antenna, ensure the required polarization is established.

Polarization adjustment bolts

Waveguide port to ODU

Waveguide port to antenna

Hook



• Secure coupler onto antenna with four M6 screws, verify the plain washers and spring washers are applied before tighten screws.

Vertical polarization Horizontal polarization

Figure 37: Secure coupler onto antenna

• At the stage, the coupler is installed onto the antenna.

M6 screws



10.2.2 ODU INSTALLATION

• Align ODU onto coupler by matching the alignment holes on the ODU with the alignment keys on coupler. See figures below.

Figure 38: Alignment key on coupler / alignment hole on ODU

• Secure ODU onto coupler by tightening all clocking buckles.

Figure 39: Secure ODU onto coupler • Follow steps above to attach another ODU onto coupler.

Figure 40: ODU attachment

Tighten locking buckle

Alignment key

Alignment hole



10.2.3 SURGE PROTECTOR INSTALLATION

Figures below present the appearance of surge protector and right angle adaptor.

Figure 41: Surge protector

Figure 42: Right angle adaptor This adaptor is designed to work as the connector between surge protector and IF cable. Right angle adaptor should be installed before surge protector installation. To install right angle adaptor, connect one end to the ODU IF interface, connect another end one end of surge protector. Connect the one end of the grounding wire to the grounding point of the ODU and surge protector, fix the other end to the grounding terminal of the building ground point.

Figure 43: Surge protector installation Follow steps above to install surge protector onto another ODU.

Surge protector

Right angle adaptor



10.2.4 IF CABLE CONNECTION

This refers to the connection between ODU and IDU. Before connecting the IF (IDU-ODU) cable, ensure that the IDU is powered OFF. Locate and connect the IF cable to the N-type connector of the installed surge protector, and the other end of the IF cable goes to the “IF” interface on the IDU. Seal the surge protector assembly and connector of the IF cable with silicone sealant and the waterproof tape.

Figure 44: IF cable connection Follow steps above achieve IF cable installation to another ODU.



10.3 INSTALLED ODU

The figures below present the final appearance of the installed ODU in unprotected and protected system after implementing the installation of antenna, ODU and cables.

System Configuration Vertical Polarization Horizontal Polarization

Unprotected System

Protected System



11 ANTENNA ALIGNMENT

11.1 ANTENNA PRE-ALIGNMENT

Path profile analysis will provide each installation site with the required elevation information, for initial installation it is sufficient for the antenna to be pointed in the general direction as fine tuning will take place during alignment For site installation, obtain the site installation information of each site, locate and verify the required azimuth and elevation is achieved before commencing to make any alignment to any antenna. For azimuth and elevation alignment, arrange each hop to act as Transmitter and Receiver station at any one time, alignment involves of fine tuning, and is an iterative process, to perform and establish one alignment per iteration. The objective is to maximise the receive signal at the Receiver signal for the hop. Before proceeding to antenna pre-alignment, ensure each end of the hop is equipped with known working equipment. Equip the transmitter station:

• Fully equipped IDU, ODU and antenna • Set the IDU ATPC function to “disable” and that it is transmitting signal.

Equip the receiver station:

• ODU installed • Universal meter for RSSI measurement.



11.2 ANTENNA PAIR IDENTIFICATION

Given a practical installation site, it is expected the receive station is unable to receive unwanted RF signals in the frequency band. Proceed to identify and isolate the wanted RF signal in the presence of unwanted signal. For each ODU supplied, a unique ‘lookup table’ is supplied to specify the relationship between RSL and RSSI level. Ensure the serial number of the ODU matches the correct ‘lookup table’ before proceeding.

RSL (dBm) Vbnc (V) -20 4.50 -25 4.19 -30 3.87 -35 3.56 -40 3.25 -45 2.94 -50 2.65 -55 2.31 -60 2.0 -65 1.69 -70 1.37 -75 1.06 -80 0.75 -85 0.44 -90 0.12

For the specific operating frequency of the hop, arrange to enable the RSL to become variable within an allowable range, correlate the data in the ‘lookup table’ against the RSSI reading along all points of the RSL range. The antenna pair is identified when measured RSSI level matches against the corresponding RSL values specified in the lookup table.



11.3 ANTENNA FINE-ALIGNMENT

Each ODU has a DC voltage connection for connection to a universal multimeter. This is a RSSI indication, and is monitored by the multimeter. RSSI indication is indicated by a voltage reading, as azimuth and elevation adjustments are made, the voltage level indicate the ‘closeness’ of the optimal setting.

RSSI profile for ODU

The above figure represents the RSSI level as the antenna is being brought into alignment. Location of the optimal signal strength should be at the maximum of its RSSI profile.



11.4 ANTENNA ADJUSTMENT

11.4.1 ANTENNA AZIMUTH ADJUSTMENT

Follow the steps below to make antenna azimuth adjustment. • Prepare for azimuth adjustment by locating and loosening the bolts on the mounting bracket.

Using the figure below as a guide and examine to locate the exact bolts on the mounting bracket.

Figure 45: Loosen nuts for azimuth adjustment • Make coarse azimuth adjustment by swinging antenna in different direction and make fine

azimuth adjustment by moving nuts on azimuth adjustment level (take figures below as a guide), observe the RSSI reading from ODU, until the reading is at its maximum (refer to section 11.3 for details).

Figure 46: Coarse/fine azimuth adjustment • Once azimuth adjustment is achieved, re-check RSSI reading and if necessary, repeat steps

above until the settings are optimized.

Loosen nuts for azimuth adjustment

Adjusting nut



11.4.2 ANTENNA ELEVATION ADJUSTMENT

• Prepare for elevation adjustment by locating and loosening the bolts on the mounting bracket. Use the drawing as a guide and examine to locate the exact bolts on the mounting bracket.

Figure 47: Loosen nuts for elevation adjustment • Make coarse elevation adjustment by turning antenna vertically and make fine elevation

adjustment by moving nuts on elevation adjustment level, observe the RSSI reading from ODU, until the reading is at its maximum (refer to section 11.3 for details).

• Once elevation adjustment is achieved, re-check RSSI reading and if necessary, repeat steps

above until the settings are optimized.

Loosen nuts for elevation adjustment



12 ML-MV IDU FUNCTIONALITY

12.1 CHANNEL SELECTION

The working frequency of the ODU working in the same sub-band can be configured through the monitoring system as LCT or NMS.

12.2 TRANSMIT POWER CONTROL FUNCTION

Through the monitoring system, ODU Tx output power can be configured.

12.3 AUTOMATIC GAIN CONTROL (AGC)

ODU can automatically control the gain of the power amplifier for the received signal according to the power level, which ensures the IF signals of consistent power level can be transmitted to the IDU, and ensures the performance of the entire communications system. 12.4 DIGITAL SIGNAL PROCESSING (DSP)

DSP implements digital filtering and processing modulated and demodulated signal. Using DSP, the signal-to-noise ratio (SNR) can be reduced and the performance of a communication system can be improved. In parallel, the application of FEC enables a limited number of errors to be detected and corrected without retransmission, increasing RSL threshold and improving the performance of communication system.

12.5 SIGNAL PROCESSING

The following signals are processed by the IDU:

• E1 tributary Interface: for E1 signal input and output. • NMS Interface: for monitor and management. • EOW Interface: provides voice connection between ends of a radio link. • Auxiliary Data Channels: providing users with serial data interfaces via “AUX” interface. RS-

232 or RS-422 protocol is provided for these interfaces. Both synchronous and asynchronous modes are available. Auxiliary data can be transmitted through this channel.

12.6 MONITORING AND NETWORK MANAGEMENT

The monitoring and network management can be applied to the system. In addition to its own operation status, internal temperature, transmitting power and frequency, receiving and transmitting level, system alarming can also be monitored.

--End of section



13 COMMISSIONING

The system can be configured only after the link has been aligned through the CIT interface for local commissioning and the NMS port for remote control. The local commissioning via CIT must be performed on both sides of the link. This section focuses on the local commissioning via the CIT port, please refer to the separate NMS manual (refer to 0.6.2) for ML-MV NMS. 13.1 EQUIPMENT POWER-UP

Before applying power, check that the expected voltage, current, and power levels do not violate any ratings. Double check all connections before applying power. Do not manipulate circuits or make changes when power applied. System commissioning includes: • Prepare for alignment and configuration • Setup transmission • Fine alignment • Verifying installation • Configuration 13.2 LAUNCH THE CIT

To launch the CIT terminal, follow the steps below: Step 1: Click Program -> Accessories -> Communications ->choose Hyper Terminal Step 2: Create a user Name, and then choose the first icon as below:

Figure 48: Launch the CIT terminal – step 2



Step 3: In the prompt window, choose the correct “COM” in the “Connect using” menu as below:

Figure 49: Launch the CIT terminal – step 3 Step 4: Click “Bits per second” to set the properties for the selected COM, in this case, select 19200 as below:




Step 5: Select “None” in the “Flow control” menu as below:


Step 6: Click “OK” to access the terminal screen. Select File -> Properties -> Setting, in the prompt window as following, select “VT100” in the “Emulation” menu and click “OK” to confirm.




Steps 7: The window below will be viewed to indicate successful connect to the system, insert the password “admin” and press ENTER to enter the system.




13.3 CIT TOP MENU

Current AlarmsLink >E1 Trib >IF >ODU >User Input

LOFLink ID MismatchRDI

LOS (1-8)LOS (9-17)

IF Module LossIF ModeIF Tx PLLIF Rx PLL

IDU-ODUODU RSLODU Tx PowerODU -5vODU PA-IODU Tx PLLODU Rx PLL

Alarm

ODU

ODU InformationODU TempSSPATx PowerODU RSLTx FreqRx Freq

IDU IDU Information IDU Status >Auxiliary >

IDU TempTraffic CapIF Tx FreqIF Rx Freq

Link

Link IDRSL Alarm ThresholdATPC EnableATPC Trigger Level

System

System ModeProtection (1+1) >Alarm Buzzer EnableSystem TimeFactory SettingsSoftware ResetSystem Reset

Test

E1 Trib Line LoopE1 Trib System LoopLAN Line LoopLAN System LoopIF LoopRF LoopSingle TonePRBS Test >

Local >Remote >

Network

ETH Set Link PPP >IP Routing >Trap IP

PPP EnablePPP IP

Route TableRoute Add

AUX Mode

Performance(1+0 mode) Logs >

Export Logs

Clear Logs

Performance(1+1 mode) Protection >

Logs >

Demux Switch Counter

ODU Switch Counter

Protection ModeSwitch ModeDemux Switch SetODU Switch Set

PRBS Settings

PRBS Status

Export Logs

Clear Logs



LOS (1-8)LOS (9-17)


IDU-ODUODU RSLODU Tx PowerODU -5vODU PA-IODU Tx PLLODU Rx PLL

Alarm

ODU



IDU TempTraffic CapIF Tx FreqIF Rx Freq

Link


System


Test


Local >Remote >

Network


PPP EnablePPP IP


AUX Mode

Performance(1+0 mode) Logs >

Export Logs

Clear Logs

Performance(1+1 mode) Protection >

Logs >


ODU Switch Counter


PRBS Settings

PRBS Status

Export Logs

Clear Logs Figure 54: 17E1 CIT top menu





LOS (1-8)LOS (9-17)


IDU -ODUODU RSLODU Tx PowerODU -5vODU PA -IODU Tx PLLODU Rx PLL

Alarm

ODU



IDU TempTraffic CapIF Tx FreqIF Rx FreqLAN Setting >

Link


System


Test


Local >Remote >

Network


PPP EnablePPP IP


AUX Mode

Performance(1+0 mode ) Logs >

Export Logs

Clear Logs

Performance(1+1 mode ) Protection >

Logs >


ODU Switch Counter


LAN Setting (1-17)

PRBS Settings

PRBS Status

Export Logs

Clear Logs



LOS (1-8)LOS (9-17)


IDU -ODUODU RSLODU Tx PowerODU -5vODU PA -IODU Tx PLLODU Rx PLL

Alarm

ODU



IDU TempTraffic CapIF Tx FreqIF Rx FreqLAN Setting >

Link


System


Test


Local >Remote >

Network


PPP EnablePPP IP


AUX Mode

Performance(1+0 mode ) Logs >

Export Logs

Clear Logs

Performance(1+1 mode ) Protection >

Logs >


ODU Switch Counter


LAN Setting (1-17)

PRBS Settings

PRBS Status

Export Logs

Clear Logs Figure 55: 17E1+ETH CIT top menu

“Local” menu provides users with the access to a variety of measurement and maintenance information for the local end IDU of the link, while “Remote” menu is for the remote end IDU of the link. Sections below are taking “Local” menu as an example to demonstrate how to achieve the local system commissioning.



13.4 CIT CONTROL

The CIT can be controlled by using keyboard. The mark “>” indicates that there are submenus exist, press “ENTER” to access to the submenu; press the direction buttons to select the submenu. Refer to the table below:

Key Description

Enter Press to confirm accessing to the submenu

← Press to return back to the upper menu

↑ and ↓ Press to select the menu

Tab Press to select the configurable parameters

F4 Refresh

Table 6: Keyboard instruction for CIT operation



13.5 ALARM MENU

The alarm menu provides access to alarms of ML-MV. Shown below is a description of details.

Parameters Description Current Alarms Read the current alarms

Link LOF Loss of frame alarm Link ID mismatch Link ID mismatch alarm Link

RDI Remote defect indication alarm LOS (1-8) Loss of signal in trib1 to trib8 alarm E1 Trib LOS (9-17) Loss of signal in trib9 to trib17 alarm IF Module Loss IF module loss alarmIF Demod IF signal demodulation alarmIF Tx PLL IF Tx phase locked loop alarm

IF

IF Rx PLL IF Rx phase locked loop alarmIDU-ODU Alarm of IDU and ODU connection ODU RSL ODU received signal level alarmODU Tx Power ODU transmitter power alarmODU -5V ODU -5V power supply alarmODU PA-I ODU power amplifier alarmODU Tx PLL ODU Tx phase locked loop alarm

ODU

ODU Rx PLL ODU Rx phase locked loop alarm UserInput External input alarm

Table 7: Alarm menu details

Current Alarms To read current alarms, follow steps below: 1. At the main menu, select “Alarm” “Current Alarms”. Press “Enter” key to confirm each selection.

Figure 56: Current alarms 2. All the current alarms can be read from the window shows up subsequently.



Mask/unmask alarms Below is an example of masking/unmasking alarms. To mask/unmask alarm, follow steps below: 1. Go to “Alarm” “Link” “Link LOF”. Press “Enter” key to confirm each step.

Figure 57: Mask/unmask alarm-1 2. Select “Mask” or “Unmask” via “Tab” key, then press “Enter” key to accept this selection.

Figure 58: Mask/unmask alarm-2



13.6 NETWORK MENU

Network menu enables user to monitor and control the following parameters.

Parameters Description ETH Set n/a Read / set up IP address

PPP Enable Enable / disable PPP address Link PPP Set PPP IP Read / set up PPP local IP address Route Table Read / set up routes IP Routing Route Add Add IP route

Trap IP n/a Set up IP address for trap report

Table 8: Network menu details



ETH Set User can set up the IP address for the purpose of network management. To set up IP address, follow: 1. At the main menu, select “Network” “ETH”. Press “Enter” key to confirm each selection.

Figure 59: Network menu

2. Enter information required for ETH setting and press “Enter” key to confirm the setting.

Figure 60: ETH set



Link PPP Set PPP Enable To enable/disable PPP, follow: 1. Go to “Network” “Link PPP Set” “PPP Enable”. Press “Enter” key to confirm each step.

Figure 61: Link PPP enable-1

2. Select “Enable” / “Disable” via “Tab” key, then press “Enter” key to accept this selection.

Figure 62: Link PPP enable-2



PPP IP To set up PPP Local IP, follow steps below: 1. Go to “Network” “Link PPP Set” “PPP Local IP”. Press “Enter” key to confirm each step.

Figure 63: Link PPP IP-1

2. Enter information required for PPP local IP setting and press “Enter” to confirm the setting.

Figure 64: Link PPP IP-2



IP Routing Route Table 1. At the main menu, select “Network” “IP Route” “Route Table”. Press “Enter” key to confirm

each selection.

Figure 65: IP route menu 2. User can read all the current routes and delete the unwanted route as well. Input the serial

number of the unwanted route, for example “1”, in the “Delete Route No.” field and then press “Enter” key, the selected route will be deleted successfully.

Figure 66: Route table set



Add Route To add route, follow: 1. At the main menu, select “Network” “IP Route” “Add Route”. Press “Enter” key to confirm

each step.

Figure 67: Add route-1

2. Input information required for adding route, then press “Enter” key to accept the setting.

Figure 68: Add route-2



Trap IP To set up trap IP, follow steps below: 1. Go to “Network” “Trap IP”. Press “Enter” key to confirm each step.

Figure 69: Trap IP setting-1

2. Enter the information required for trap IP setting, then press “Enter” key to accept the setting.

Figure 70: Trap IP setting-2



13.7 ODU MENU

The ODU section of the CIT provides access to a variety of measurements information. Following table is a description of details.

Parameters Description ODU Information Read ODU type, serial number and firmware version ODU Temp Read ODU current temperature SSPA Enable/disable solid state power amplifier Tx Power Read / set up transmitter power ODU RSL Read receiver signal level Tx Freq Read / set up transmitter frequency Rx Freq Read receiver frequency

Table 9: ODU menu details



ODU Information To read ODU information, follow: 1. At the main menu, select “ODU” “ODU Information”. Press “Enter” key to confirm each

selection.

Figure 71: Reading ODU information-1

2. ODU type information can be read from the following window.

Figure 72: Reading ODU information-2



ODU Temp To read ODU current temperature, follow: 1. Go to “ODU” “ODU Temp”. Press “Enter” key to confirm each step.

Figure 73: Reading ODU Temperature-1

2. ODU current temperature can be read from the following window.

Figure 74: Reading ODU Temperature-2



SSPA To enable/disable SSPA, follow: 1. At the main menu, select “ODU” “SSPA”. Press “Enter” key to confirm each selection.

Figure 75: SSPA on/off-1

2. Select “on” / “off” via “Tab” key to enable / disable SSPA and press “Enter” to accept this

selection.

Figure 76: SSPA on/off-2



Tx Power To read/set up transmitter power, follow: 1. At the main menu, select “ODU” “Tx Power”. Press “Enter” key to confirm each selection.

Figure 77: TX power reading/setting-1

2. Max. and Min. values have been given, user needs to set up the Tx power within the setting

range. Input the required value into “Set” field and press “Enter” to accept this change. The resultant value will show up in the “Cur” field.

Figure 78: TX power reading/setting-2



ODU RSL To read receiver signal level, follow: 1. Go to “ODU” “ODU RSL”. Press “Enter” key to confirm each step.

Figure 79: ODU RSL reading-1

2. Receiver signal level can be read from the following window.

Figure 80: ODU RSL reading-2



Tx Freq To read/set up transmitter frequency, follow; 1. Go to “ODU” “Tx Freq”. Press “Enter” key to confirm each step.

Figure 81: Tx frequency reading/setting-1

2. Max. and Min. values have been given, user needs to set up the Tx frequency within the setting

range. Input the required value into “Set” field and press “Enter” to accept this change. The resultant value will show up in the “Cur” field.

Figure 82: Tx frequency reading/setting-2



Rx Freq To read receiver frequency, follow: 1. Go to “ODU” “Rx Freq”. Press “Enter” key to confirm each step.

Figure 83: Rx frequency reading-1

2. Receiver frequency can be read from the following window.

Figure 84: Rx frequency reading-2



13.8 IDU MENU

The IDU section of the CIT provides access to a variety of measurements information and maintenance functions. Table below is a description of details.

Parameters Description IDU Information Read IDU information

IDU Temp Read IDU current temperature Traffic Cap Read / set up traffic capacity Tx IF Freq Read / set up transmitter IF frequency Rx IF Freq Read receiver IF frequency

IDU Status

LAN Setting LAN Setting (1-17) Set up LAN transmission Auxiliary User Output Set up user output

Table 10: IDU menu details



IDU Information To read IDU information, follow: 1. At the main menu, go to “IDU” “IDU Information”. Press “Enter” key to confirm each step.

Figure 85: IDU information reading-1

2. IDU type information can be read from the following window.

Figure 86: IDU information reading-2



IDU Status IDU Temp To read IDU current temperature, follow: 1. Go to “IDU” “IDU Status” “IDU Temp”. Press “Enter” key to confirm each step.

Figure 87: IDU temperature reading-1

2. IDU current temperature can be read from the following window.

Figure 88: IDU temperature reading-2



Traffic Cap ML-MV IDU capacity is configurable via CIT. Steps are as follows: 1. At the main menu, select “IDU” “IDU Status” “Traffic Cap”, and press “Enter” key to confirm

each selection.

Figure 89: Traffic capacity setting-1

2. Input the expected value in the “Set” field and then press “Enter” key to accept the setting.

Figure 90: Traffic capacity setting-2



Tx IF Freq To read/set up transmitter IF frequency, follow: 1. Go to “IDU” “IDU Status” “Tx IF Freq”. Press “Enter” key to confirm each step.

Figure 91: Tx IF frequency reading/setting-1

2. Enter the expected value and press “Enter” key to accept the setting.

Figure 92: Tx IF frequency reading/setting-2



Rx IF Freq To read receiver IF frequency, follow: 1. Go to “IDU” “IDU Status” “Rx IF Freq”. Press “Enter” key to confirm each step.

Figure 93: Rx IF frequency reading-1

2. Receiver IF frequency can be read from the following window.

Figure 94: Rx IF frequency reading-2



LAN Setting To set up LAN port, follow: 1. Go to “IDU” “IDU Status” “LAN Setting” “LAN Setting (1-17)”. Press “Enter” key to

confirm each step.

Figure 95: LAN setting-1

2. Move the cursor to the expect “Set” field and select “LAN” via “Tab” key, then press “Enter” to

accept the change.

Figure 96: LAN setting-2



Auxiliary User Output To set up user output, follow: 1. Go to “IDU” “Auxiliary” “User Output”. Press “Enter” key to confirm each step.

Figure 97: User output setting-1

2. Select the expected setting via “Tab” key and press “Enter” key to accept the selection.

Figure 98: User output setting-2



Table below is a description of settings.

Item Description 1+0 1+1

Open On IDU Alarm Open when the IDU alarm appears in the local end, otherwise, close. √ √

Open On ODU Alarm Open when the ODU alarm appears in the local end, otherwise, close. √

Open On RDI Alarm Open when RDI alarm appears, otherwise, close. √ √ Open On Alarms Always open √ √ Always Closed Always close √ √

Always Open Open when the ODU alarm appears in the local end, otherwise, close. √ √

Open On M ODU Alarm Open when the main ODU alarm appears in the local end, otherwise, close. √

Open On P ODU Alarm Open when the protect ODU alarm appears in the local end, otherwise, close. √



13.9 LINK MENU

Link menu enables user to monitor and control the following parameters.

Parameters Description

Link ID Read / set up Link ID

RSL Alarm Threshold Read / set up RSL alarm threshold

ATPC Enable Enable or disable ATPC

ATPC Trigger Level Read / set up ATPC trigger level

Table 11: Link menu details



Link ID To set up link ID, follow: 1. At the main menu, go to “Link” “Link ID”. Press “Enter” key to confirm each step.

Figure 99: Link ID setting-1

2. Input the expected value into “Set” filed and press “Enter” key to confirm the setting.

Figure 100: Link ID setting-2

Note: It’s a requirement that link ID of both ends of one link should be set up as the same, otherwise, link ID alarm appears.



RSL AlarmThreshold To read/set up RSL alarm threshold, follow: 1. Go to “Link” “RSL Threshold” from main menu. Press “Enter” key to confirm each step.

Figure 101: RSL threshold reading/setting-1

2. Input the required value (within the range from -127 to +127) into “Set” field and press “Enter” to accept the setting.

Figure 102: RSL threshold reading/setting-2



ATPC Enable To enable/disable ATPC, follow: 1. Go to “Link” “ATPC Enable”. Press “Enter” key to confirm each step.

Figure 103: ATPC enable-1

2. Select “Enable” / “Disable” via “Tab” key, and press “Enter” key to accept this selection.

Figure 104: ATPC enable-2



ATPC Trigger Level To set up ATPC trigger level, follow: 1. Go to “Link” “ATPC Trigger Level” from main menu. Press “Enter” key to confirm each step.

Figure 105: ATPC trigger level reading/setting-1

2. Input the required value into “Set” filed, then press “Enter” to confirm. The resultant value will

show up in the “Cur” field. Min. and max values have been provided, user must set the value within the setting range.

Figure 106: ATPC trigger level reading/setting-2



13.10 SYSTEM MENU

System menu enables user to monitor and control the following parameters.

Parameters Description 1+0 1+1

System Mode Read / set up system mode √ √

Protection Mode Read / set up protection mode √

Switch Mode Read / set up protection switch mode √

Demux Switch Set Read / set up Demux switch √ Protection

ODU Switch Set Read / set up ODU switch

√

Alarm Buzzer Enable Enable or disable alarm buzzer √ √

System Time Read / set up system time √ √

Factory Setting Revert to factory default setting √ √

Software Reset Reset MPU √ √

System Reset Reset system √ √

Table 12: System menu details



System mode To read/set up system mode, follow: 1. Go to “Local” “System” “System mode”. Press “Enter” key to confirm each step.

Figure 107: System mode reading/setting-1

2. Select the required mode via “Tab” key, and press “Enter” key to accept the selection.

Figure 108: System mode reading/setting-2



Protection Protection Mode To read/set up protection mode, follow: 1. Go to “System” “Protection” “Protection Mode”. Press “Enter” key to confirm each step.

Figure 109: Protection mode reading/setting-1

2. Select the required protection mode via “Tab” key and press “Enter” key to confirm the selection.

Figure 110: Protection mode reading/setting-2



Switch mode To read/set up switch mode, follow: 1. Go to “System” “Protection” “Switch Mode”. Press “Enter” key to confirm each step.

Figure 111: Protection switch mode reading/setting-1

2. Select the required switch mode via “Tab” key and press “Enter” key to confirm the selection.

Figure 112: Protection switch mode reading/setting-2

Note: when the protection mode “Frequency Diversity” is applied, ODU of both ends are active, the protection switch mode is not allowed to configure.



Demux Switch Set To set up Demux switch, follow: 1. Go to “System” “Protection” “Demux Switch Set”. Press “Enter” key to confirm each step.

Figure 113: Demux switch setting-1


Figure 114: Demux switch setting-2



ODU Switch Set To set up ODU switch, follow: 1. Go to “System” “Protection” “ODU switch set”. Press “Enter” key to confirm each step.

Figure 115: ODU switch setting-1


Figure 116: ODU switch setting-2

Note: when the protection mode “hot standby” and the switch mode “Manual” are applied, the “ODU switch set” will not be available.



Alarm Buzzer Enable To enable/disable alarm buzzer, follow: 1. Go to “System” “Alarm Buzzer Enable”. Press “Enter” key to confirm each step.

Figure 117: Buzzer enable-1

2. Select “Open” / “Close” via “Tab” key to enable / disable alarm buzzer and press “Enter” key to

accept this selection.

Figure 118: Buzzer enable-2



System time To read/set up system time, follow: 1. At the main screen of CIT, go to “System” “System Time”. Press “Enter” key to confirm each

step.

Figure 119: System time reading/setting-1

2. Enter the time value in the “Set” field and press “Enter” to confirm the setting.

Figure 120: System time reading/setting-2



Factory default setting To revert to factory setting, follow: 1. Go to “System” “Factory Default Setting”. Press “Enter” key to confirm each step.

Figure 121: Factory setting reverting-1

2. Select “Yes” via “Tab” key and press “Enter” key to confirm the selection.

Figure 122: Factory setting reverting-2



MPU Reset To reset MPU, follow: 1. Go to “System” “MPU Reset”. Press “Enter” key to confirm each step.

Figure 123: MPU reseting-1


Figure 124: MPU reseting-2

Note: MPU resetting would not interrupt the system operation.



System Reset To reset system, follow: 1. Go to “System” “System Reset”. Press “Enter” key to confirm each step.

Figure 125: System resetting-1


Figure 126: System resetting-2

Note: Some settings will be reverted to factory default setting after MPU/SYS reset. Refer to appendix B for details of factory default setting. System operation would be interrupted by system resetting.



13.11 TEST MENU

System menu enables user to monitor and control the following parameters.

Parameters Description

E1 Trib Local Loop Set up E1 trib local loop

E1 Trib System Loop Set up E1 trib system loop

LAN Line Loop Set up LAN line loop

LAN System Loop Set up system loop

IF Loop Set up IF loop

RF Loop Set up RF loop

Single Tone Generate pilot tone

PRBS Setting Read / set up PRBS PRBS Test PRBS Status Read / set up PRBS status

Table 13: Test menu details



E1 Trib Local Loop To set up E1 trib local loop, follow: 1. Go to “Test” “E1 Trib Local Loop”. Press “Enter” key to confirm each step.

Figure 127: E1 trib local loop-1

2. Select ”Loop” via “Tab” key and press “Enter” key to accept the selection.

Figure 128: E1 trib local loop-2



E1 Trib System Loop To set up E1 trib system loop, follow: 1. Go to “Test” “E1 Trib System Loop”. Press “Enter” key to confirm each step.

Figure 129: E1 trib system loop setting-1


Figure 130: E1 trib system loop setting-2



LAN Line Loop To set up LAN line loop, follow: 1. Go to “Test” “LAN Line Loop”. Press “Enter” key to confirm each step.

Figure 131: LAN line loop setting-1


Figure 132: LAN line loop setting-2



LAN System Loop To set up LAN system loop, follow: 1. Go to “Test” “LAN System Loop”. Press “Enter” key to confirm each step.

Figure 133: LAN system loop setting-1


Figure 134: LAN system loop setting-2



IF Loop To set up IF loop, follow: 1. Go to “Test” “IF Loop”. Press “Enter” key to confirm each step.

Figure 135: IF loop setting-1

2. Select ”Loop” via “Tab” key and press “Enter” key to confirm the selection.

Figure 136: IF loop setting-2



RF Loop To set up RF loop, follow: 3. Go to “Test” “RF Loop”. Press “Enter” key to confirm each step.

Figure 137: RF loop setting-1

4. Select ”Loop” via “Tab” key and press “Enter” key to confirm the selection.

Figure 138: RF loop setting-2



Single Tone Single Tone is disabled by default for commissioning. User can enable it by following the steps below. 1. Go to “Test” “Single Tone Enable” from the main screen. Press “Enter” key to confirm each

step.

Figure 139: Single tone enable-1

2. Select ”Enable” via “Tab” key and press “Enter” key to confirm this selection.

Figure 140: Single tone enable-2



PRBS Test PRBS (Pseudorandom Binary Sequence), the integrated digital analyzer in IDU, is designed to make trouble shooting easier. The IF loop and E1 trib system loop test can be achieved with integrated PRBS digital analyzer, refer to section 15.5 for details. PRBS Set 1. Go to “Test” “PRBS Test” “PRBS Set”. Press “Enter” key to confirm each step.

Figure 141: PRBS settings-1

2. The window below will show up.

Figure 142: PRBS setting-2



3. Table below is a description of configurable parameter of PRBS setting.

Parameters Description Operation

On: PRBS is activated. On/off

Off: PRBS is deactivated.

Select “on” / “off” via “Tab” key and press “Enter” key to acknowledge the selection.

Inside: when the mode “Inside” is applied,

it aims to achieve the BER test for system

E1 signals. Mode

Outside: when the mode “Outside” is applied,

it aims to achieve the BER test for E1 signals

from external equipment.

Select “Inside” / “Outside” via “Tab” key and press “Enter” key to confirm the selection.

Trib To set up trib test. Only one trib is tested at one time.

Input the serial number of the trib expects to test, for example “1”, and press “Enter” key to accept the setting.

Stop: disable resetting “Test Time” and “Error Count”. Status

Run: reset “Test Time” and “Error Count”.

Select “Stop” / “Run” via “Tab” key and press “Enter” key to confirm the selection.



PRBS Status 1. Go to “Test” “PRBS Test” “PRBS Status”. Press “Enter” key to confirm each step.

Figure 143: PRBS status-1

2. The window below will show up.

Figure 144: PRBS status-2



3. Table below is a description of configurable parameter of PRBS setting.

Parameters Description Operation

Stop: disable resetting “Test Time” and “Error Count”. Test Status

Run: reset “Test Time” and “Error Count”.

Select “Stop” / “Run” via “Tab” key and press “Enter” key to confirm the selection.

Test Time To record the time when PRBS is applied.

Error Count To count the bit error when PRBS is applied.

Error Bit Insert: to manually add a bit error Press “Enter” key to accept.



13.12 PERFORMANCE MENU

The Performance menus are used to display and reset the various performance monitoring (PM) counters.

Parameters Description 1+0 1+1 Demux switch counter Reset Demux switch counter √ Protection ODU switch counter Reset ODU switch counter √ Save logs Export Save logs √ √ Logs Clear logs Clear logs √ √

Table 14: Performance menu



Protection Demux Switch Counter To reset demux switch counter, follow: 1. Go to “Performance” “Protection” “Demux Switch Counter”. Press “Enter” key to confirm

each step.

Figure 145: Demux switch counter resetting-1

2. Select “Yes” via “Tab” key and press “Enter” to confirm this selection.

Figure 146: Demux switch counter resetting-2



ODU Switch Counter To reset ODU switch counter, follow: 1. Go to “Performance” “Protection” “ODU Switch Counter”. Press “Enter” key to confirm each

step.

Figure 147: ODU switch counter resetting-1

2. Select “Yes” via “Tab” key and press “Enter” to confirm this selection.

Figure 148: ODU switch counter resetting-2



Logs Export Logs To export logs, follow: 1. Go to “Performance” “Logs” “ExportLogs”. Press “Enter” key to confirm each step.

Figure 149: Export logs-1

2. Select “Yes” via “Tab” key and press “Enter” key to accept the selection.

Figure 150: Export logs-2



Clear Logs To clear logs, follow: 1. Go to “Performance” “Logs” “Clear Logs”. Press “Enter” key to confirm each step.

Figure 151: Clear logs-1

2. Select “Yes” via “Tab” key and press “Enter” key to accept the selection.

Figure 152: Clear logs-2



14 SET UP WORKING LINK

14.1 SETUP WORKING LINK FOR 1+0 CONFIGURATION

To set up working link, follow: 1. Install Antenna (refer to section 9 Antenna Installation). 2. Coarse antenna Alignment (refer to Section 11.4 Antenna Adjustment). 3. Attach ODU onto Antenna (refer to section 10.1 ODU Installation in Unprotected Configuration). 4. Connecting IF cable (refer to section 10.1.3 IF Cable Connection) 5. Power on IDU (refer to section 8.3.3 Powering the IDU). 6. Power on ODU by switching “ODU ON”, the toggle switch located in the middle of the IDU front

panel. 7. Launch CIT (refer to section 13.2 Launch the CIT). 8. Go to CIT, make sure SSPA is on. Then set up TX Power as specified in datasheet (refer to

section 13.7 ODU menu for configuration of SSPA and TX power). 9. Configure the Tx requency (refer to section 13.7 ODU Menu for Tx frequency set up). 10. Make sure Link ID of both ends is identified, IDU capacity for each ends should be configured to

the same value (refer to section 13.8 IDU menu for configuration of traffic capacity). If the capacity is not changed, skip step 11.

11. Reset the IDU on both sides (refer to section 13.10 System Menu for system resetting). 12. Fine antenna alignment (refer to Section 11.3 Antenna Fine-alignment). 13. Complete the working link setting with the LAN setting checking in order to verify the correct data

traffic transmission is achieved. (Refer to 13.8 IDU menu for LAN setting).



14.2 SETUP WORKING LINK FOR 1+1 CONFIGURATION

To set up working link for 1+1 configuration, follow: 1. Install Antenna (refer to section 9 Antenna Installation).

2. Coarse antenna Alignment (refer to Section 11.4 Antenna Adjustment).

3. Attach ODU onto Antenna (refer to section 10.2 ODU Installation in Unprotected Configuration). 4. Connecting IF cable (refer to section 10.2.4 IF Cable connection) 5. Power on IDU (refer to section 8.3.3 Powering the IDU). 6. Power on ODU by switching “ODU ON”, the toggle switch located in the middle of the IDU front

panel. Ensure two ODUs have been powered on. 7. Launch CIT (refer to section 13.2 Launch the CIT). 8. Go to CIT, make sure SSPA is on. Then set up TX Power as specified in datasheet (refer to

section 13.7 ODU menu for configuration of SSPA and TX power). 9. Go to CIT to configure the System mode (refer to section 13.10 System menu for system mode

set up). 10. Go to CIT configure the Protection mode (refer to section 13.10 System menu for protection

mode set up). 11. Go to CIT to configure the Switch Mode, Set both Demux Switch and ODU switch as “Auto”.

(refer to section 13.10 System menu for switch mode set up). 12. Go to CIT to configure the Tx Frequency (refer to section 13.7 ODU Menu). 13. Make sure Link ID of both ends is identified, IDU capacity for each ends should be configured to

the same value (refer to section 13.8 IDU menu for configuration of traffic capacity). If the capacity is not changed, skip step 14.

14. Reset the IDU on both sides of the hop (refer to section 13.10 System Menu for system

resetting). 15. Fine antenna alignment (Refer to Section 11.3 Antenna Fine-alignment). 16. Complete the working link setting with the LAN setting checking in order to verify the correct data

traffic transmission is achieved. (Refer to 13.8 IDU menu for LAN setting).



15 SYSTEM TESTING

The system has robust test functions, which makes commissioning and troubleshooting convenient. 15.1 E1 TRIB LOCAL LOOP

E1 Trib Local loop is mainly used for the loop among E1 interfaces. It loops E1 input to E1 output to test whether the local equipment works normally or not. To implement testing, an external BERT is needed.

Tributary 1

Tributary

MUX

MOD

DE

MUX

DE

MOD

ODUTributary 1

Tributary

IDU

REMOTE

Tributary 1

Tributary

Tributary 1

Tributary

RF

Tributary 1

Tributary

MUX

MOD

DE

MUX

DE

MOD

ODUTributary 1

Tributary

IDU

REMOTE

Tributary 1

Tributary

Tributary 1

Tributary

RFN

N

N

N

Tributary 1

Tributary

MUX

MOD

DE

MUX

DE

MOD

ODUTributary 1

Tributary

IDU

REMOTE

Tributary 1

Tributary

Tributary 1

Tributary

RF

Tributary 1

Tributary

MUX

MOD

DE

MUX

DE

MOD

ODUTributary 1

Tributary

IDU

REMOTE

Tributary 1

Tributary

Tributary 1

Tributary

RFN

N

N

N

Tributary 1

Tributary

MUX

MOD

DE

MUX

DE

MOD

ODUTributary 1

Tributary

IDU

REMOTE

Tributary 1

Tributary

Tributary 1

Tributary

RF

Tributary 1

Tributary

MUX

MOD

DE

MUX

DE

MOD

ODUTributary 1

Tributary

IDU

REMOTE

Tributary 1

Tributary

Tributary 1

Tributary

RFN

N

N

N

Tributary 1

Tributary

MUX

MOD

DE

MUX

DE

MOD

ODUTributary 1

Tributary

IDU

REMOTE

Tributary 1

Tributary

Tributary 1

Tributary

RF

Tributary 1

Tributary

MUX

MOD

DE

MUX

DE

MOD

ODUTributary 1

Tributary

IDU

REMOTE

Tributary 1

Tributary

Tributary 1

Tributary

RFN

N

N

N

Figure 153: E1 trib local loop

15.2 IF LOOP

IF loop is mainly used to check whether the local IDU works normal or not. During IF loopback test, the received traffic will be interrupt temporarily, which may result in the isolation with the NMS.

The BERT connected externally to the equipment.

Tributary 1

Tributary N

MUX

MOD

DE

MUX

DE

MOD

ODUTributary 1

Tributary N

IDU

REMOTE

Tributary 1

Tributary N

Tributary 1

Tributary

RF

Tributary 1

Tributary

MUX

MOD

DE

MUX

DE

MOD

ODUTributary 1

Tributary

IDU

REMOTE

Tributary 1

Tributary

Tributary 1

Tributary

RF

N

Tributary 1

Tributary N

MUX

MOD

DE

MUX

DE

MOD

ODUTributary 1

Tributary N

IDU

REMOTE

Tributary 1

Tributary N

Tributary 1

Tributary

RF

Tributary 1

Tributary

MUX

MOD

DE

MUX

DE

MOD

ODUTributary 1

Tributary

IDU

REMOTE

Tributary 1

Tributary

Tributary 1

Tributary

RF

N

Tributary 1

Tributary N

MUX

MOD

DE

MUX

DE

MOD

ODUTributary 1

Tributary N

IDU

REMOTE

Tributary 1

Tributary N

Tributary 1

Tributary

RF

Tributary 1

Tributary

MUX

MOD

DE

MUX

DE

MOD

ODUTributary 1

Tributary

IDU

REMOTE

Tributary 1

Tributary

Tributary 1

Tributary

RF

N

Tributary 1

Tributary N

MUX

MOD

DE

MUX

DE

MOD

ODUTributary 1

Tributary N

IDU

REMOTE

Tributary 1

Tributary N

Tributary 1

Tributary

RF

Tributary 1

Tributary

MUX

MOD

DE

MUX

DE

MOD

ODUTributary 1

Tributary

IDU

REMOTE

Tributary 1

Tributary

Tributary 1

Tributary

RF

N

Figure 154: IF loop



15.3 E1 TRIB SYSTEM LOOP

E1 Trib System Loop is mainly used to test the performance of the entire link. Data is loopback among the E1 interfaces of the local IDU and remote IDU.

The external BERT can be used to test the system performance.

Tributary 1

Tributary

MUX

MOD

DE

MUX

DE

MOD

ODUTributary 1

Tributary

REMOTE

Tributary 1

Tributary

Tributary 1

Tributary

RF

Tributary

Tributary

MUX

MOD

DE

MUX

DE

MOD

ODUTributary 1

Tributary

REMOTE

Tributary 1

Tributary

Tributary 1

Tributary

RF

IDU

N

NN

N

Tributary 1

Tributary

MUX

MOD

DE

MUX

DE

MOD

ODUTributary 1

Tributary

REMOTE

Tributary 1

Tributary

Tributary 1

Tributary

RF

Tributary

Tributary

MUX

MOD

DE

MUX

DE

MOD

ODUTributary 1

Tributary

REMOTE

Tributary 1

Tributary

Tributary 1

Tributary

RF

IDU

N

NN

N

Tributary 1

Tributary

MUX

MOD

DE

MUX

DE

MOD

ODUTributary 1

Tributary

REMOTE

Tributary 1

Tributary

Tributary 1

Tributary

RF

Tributary

Tributary

MUX

MOD

DE

MUX

DE

MOD

ODUTributary 1

Tributary

REMOTE

Tributary 1

Tributary

Tributary 1

Tributary

RF

IDU

N

NN

N

Tributary 1

Tributary

MUX

MOD

DE

MUX

DE

MOD

ODUTributary 1

Tributary

REMOTE

Tributary 1

Tributary

Tributary 1

Tributary

RF

Tributary

Tributary

MUX

MOD

DE

MUX

DE

MOD

ODUTributary 1

Tributary

REMOTE

Tributary 1

Tributary

Tributary 1

Tributary

RF

IDU

N

NN

N

Figure 155: E1 trib system loop

15.4 LOOP-BACK E1 TESTING

Only one set of BER Tester is required in loop-back testing. The connection is shown in the following figure:

ODU ODU

IDU IDU

BER Tester A

CH2 (E1 OUT)

IN

CH1 (E1 IN)

OUT

CH2 ( E1 IN) CH1 (E1 OUT)

IDU IDU

BER Tester A

ODU ODU

IDU IDU

BER Tester A

CH2 (E1 OUT)

IN

CH1 (E1 IN)

OUT


IDU A IDU B

BER Tester A

ODU ODU

IDU IDU

BER Tester A

CH2 (E1 OUT)

IN

CH1 (E1 IN)

OUT


IDU IDU

BER Tester A

ODU ODU

IDU IDU

BER Tester A

CH2 (E1 OUT)

IN

CH1 (E1 IN)

OUT


IDU A IDU B

BER Tester A

Figure 156: Loop-back test connection diagram Connect the BER test input and output interfaces to two E1 interface on IDU A. Connect the corresponding two E1 interfaces on IDU B via a cable. The BER tester is set at a data rate of 2.048Mb/s and HBD3 coding to start test. Set the BER tester in the stored counts mode to examine the stability of the equipment (with average examination duration of 24 hours) and then print out the results.



15.5 PRACTICAL E1 TESTING

To perform practical testing with external BER tester: Two sets of BER tester are required in practical testing. One acts as a signal generator and the other one the BER tester. The following figure shows the connection of the testing:

ODU ODU

IDU IDU

BER Tester A BER Tester B

E1 OUT

IN

E1 IN

OUT OUT

E1 IN E1 OUT

IN

BER Tester B

ODU ODU

IDU A IDU B


E1 OUT

IN

E1 IN

OUT OUT

E1 IN E1 OUT

IN

BER Tester B

ODU ODU

IDU IDU


E1 OUT

IN

E1 IN

OUT OUT

E1 IN E1 OUT

IN

BER Tester B

ODU ODU

IDU A IDU B


E1 OUT

IN

E1 IN

OUT OUT

E1 IN E1 OUT

IN

BER Tester B

Figure 157: Practical test connection diagram BER test input interface is connected to the output E1 interface on IDU A, while the input E1 interface on IDU B is connected to the BER tester output interface. BER test output interface is connected to the input E1 interface on IDU A, while the output E1 interface on IDU B is connected to the BER tester input interface. Both BER testers are set at a data rate of 2.048Mb/s and HBD3 coding to start test. Set the BER tester in the stored counts mode to examine the stability of the equipment (with average examination duration of 24 hours) and then print out the results.

To achieve practical testing with integrated PRBS digital analyzer: 1. Launch CIT (refer to section 11.2 for details). 2. Go to “Remote” “Test” “IF Loop” / “E1 Trib System Loop” to activate the loop function (refer

to section 11.12 for details about activating loop function). 3. Go to “Local” “Test” “PRBS Test” “PRBS Set” to set up the relative parameters as

shown below:

On/off: “ON” Mode: “Inside” Trib: input the serial number of E1 signal expects to test. Status: “Run”

4. Go to “PRBS Status” to set up the relative parameters as demonstrated below:

Test Status: Run

-End of Section



16 MAINTENANCE

After equipment commissioning, no maintenance by hand is needed. After NMS commissioning, monitoring centre can control the operation status of all the equipments in the whole network. Regular inspection is recommended to ensure system performance. • Periodically check for proper connection and tightening of all cables and mounting fixtures.

Make sure that the IDU has not been taken apart or otherwise tampered with.

• Recommend cleaning the surface of the equipment regularly to remove dust, for ensuring the normal operation and prolonging the useful life of the equipment.

• Make sure that the IDU is properly grounded as described in the previous sections.

• The installation location for IDU should be well ventilated.

• The IDU and the ODU have no internal serviceable parts. If a hardware fault occurs in either

of these units the faulty unit, it must be replaced with a working one. • Antenna systems should be inspected once a year by qualified personnel to verify proper

installation, maintenance, and the condition of equipment. Comba disclaims any liability or responsibility for the results of improper or unsafe installation practices.

-End of section



17 APPENDICES

17.1 APPENDIX A: 1.2M ANTENNA CONTRUCTION

F=430± 2

4-M4x16 screw

Reflector

Feed assembly

Feed supperort strut

Step 1: Feed Installation Attach and secure feed at base using M4x16 Screws. Attach feed support strut to reflector. Attach feed support strut at the feed horn. Align before evenly tightening the feed support strut fastened. Aim to achieve F=430±2mm.

65mm

M6 nutM6 flat washerJ-bolts with springs

M5 nutM5X16 bolt

M5 flat washerM5 spring washer

AA

Shield

Radome

Edge protector

Step 2: Assemble Shield and Radome Identify 4x shields segments, join segments with M5x16 bolts. Attach assembled shield to reflector using M5x16 bolts. Attach J-bolts to shield. Insert edge protector to the opening. Unpack radome fabric and attach to each J-bolt. Tighten each J-bolt evenly in turn, aim to leave each J-bolt protruding at

the rear by 65mm for correct tension.



M14X40 screwflat washer and spring washer










Step 3: Attach two mounting brackets onto the back of the antenna, secure with the M14X30 screws.

Step 4: Assemble and attach the mounting bracket onto the back of the antenna with the screws supplied



Step 5: At the required height attach two band clamps onto the mounting pole, and secure them with two M14X40mm bolts.

Step 6: Place the antenna attached with mounting bracket above the support band; Insert M14 U bolts to secure the mounting bracket onto the pole.



Tow er

support band

Tow er

U -bo lt

Azim unth turnbuckle

R eflector assem bly

A zim unth s trengthened assem bly

R ein force assem bly A ttach to tow er

M14X40 ScrewAssistant Pole

M10 U bolt

Reinforce pole

Mount tower

M14X40 Screw

Step 7: Connect one end of the reinforce pole onto the back of the antenna using M14X40 screw, and the other end to be assembled with the Assistant pole with two M10 U bolts supplied. And secure the assistant pole to the mount tower with one M14X40 screw.



V-polarization

H-polarization

loosen nuts to adjust azimunth

Step 8: Loosen 4x screws to rotate feed to the required orientation, tighten 4x screws in opposite diagonal manner.

Step 9: Prepare for azimuth fine adjustment by locating and loosening the bolts on the mounting bracket. Use the drawing as a guide and examine to locate the exact bolts on the mounting bracket.



Azimunth adjusting boltAzimuth fine adjusting bolt

Step 10: Locate the azimuth fine adjusting bolt as above, adjust the appropriate nuts

to make the entire antenna turn in the required direction; observe the RSSI reading from ODU, while loosen the locking mechanism along the tuning bolt with a spanner until the reading is at its minimum or maximum according to the ODU type; At this point, lock the tuning screws by securing both nuts against each other. The adjustment range for azimuth adjusting is ±15o.

Tighten all bolts once azimuth adjustment is achieved.

Step 11: Prepare for elevation fine adjustment by locating and loosening the following bolts on the mounting bracket. Use the drawing as a guide and examine to locate the exact bolts on the mounting bracket.



Elevation adjusting bolt

Step 12: Locate the bolt as above, adjust the nut to make the entire antenna turn

vertically within the range of ±15o; observe the RSSI reading from ODU, while loosen the locking mechanism along the tuning bolt with a spanner until the reading is at its minimum or maximum according to the ODU type. At this point, lock the tuning screws by securing the nut with the bolt.

Tighten the bolts after elevation is achieved.

Note: Once elevation/azimuth is achieved, re-check RSSI reading and if

necessary, repeat steps 9 to 12 until the settings are optimized. Ensure all bolts are tightened before proceeding to the next antenna.



17.2 APPENDIX B: FACTORY DEFAULT PARAMETERS

Default Setting Link LOF Link ID Mismatch Link RDI LOS (1-8) E1 Trib LOS (9-17)

Unmask

IF Module Loss IF Demod IF Tx PLL

IF

IF Rx PLL

Normal Unmask

IDU-ODU ODU RSL ODU Tx Power ODU -5V ODU PA-1 ODU Tx PLL

Alarm

ODU

ODU Rx PLL

Unmask

PPP Enable Enable Link PPP PPP Local IP null Network

IP Route Route Table null MPU Software Ver V1.00 FPGA Firmware Ver V1.1

MIB Ver V1.24

IDU Information

Power Supply DC20-60V Traffic Cap 34Mbps Tx IF Freq 350000KHz IDU Status Rx IF Freq 140000KHz AUX Mode Asyn AUX Protocol RS232

Out1 Open Open on IDU Alarm Out2 Open Open on ODU Alarm Out3 Close Open on RDI Alarm

IDU

Auxiliary User Output

Out4 Open Open on Alarms 1+0 (1+0 configuration) System Mode 1+1 (1+1 configuration) System

Alarm Buzzer Enable Open E1 Trib Line Loop Normal E1 Trib System Loop Normal IF Loop Normal

Test

Single tone Disable



17.3 APPENDIX C: RMA (RETURN MATERIAL AUTHORIZATION) FORM

Date:From:

Tel: Fax:

Item Model Serial Number Return Category Qty Problem Description12345678910

Notes:

Note:

Signature:

RMA Request Form

ATTN:

Comba Telecom Ltd.611 East Wing, No. 8 Science Park West Avenue, Hong Kong Science Park,Tai Po, Hong Kong

Tel: +852 2636 6861 Fax: +852 2637 0966

Address:

E-Mail:

Product Information:

1. For 'Return Category' column, please select from A: Return of Defective Product, B: Return of Trial Sample, or C: Returnof New and Unused Product.2. If A or C category of return product is chosen, please give short description of the problem or reason for returning.

Transportation Information:Location of Product:

Transportation Method:Shipping Forwarder:

Location of Product' must be stated, while 'Transportation Method' or 'Shipping Forwarder' can be left blank ifnot determined.

--End of Section

--End of Document

comb a

Documents

average examination

mv equipment

stored counts

rsl threshold

toggle switch

press enter

factory setting

hong kong