User's Manual

User’s Manual for Node C Network Elements
Page 4
M0121A1A_uc.doc
5 FUNCTIONAL DESCRIPTION 69
5.1 GENERAL 69
5.2 FEATURES OF THE NODE C 72
5.2.1 Filters 72
5.2.2 Digital ICE (Digital Interference Cancellation Equipment) 72
5.2.3 VSWR (Voltage Standing Wave Ratio) 73
5.2.4 RSSI (Receive Signal Strength Indication) 73
5.2.5 Alarmforwarding 73
5.2.6 External Alarms 74
5.2.7 Summary Alarm 75
5.3 COMPONENTS OF THE NODE C AND INTERFACE UNIT 76
5.3.1 Duplexer 76
5.3.2 RF and DC Distribution Unit 78
5.3.3 Digital Channel Module (DCM) 79
5.3.4 Uplink Final Amplifier 80
5.3.5 Downlink Final Amplifier 80
5.3.6 Distribution & Alarm Board 82
5.3.7 Power Supply 83
5.4 OPTIONAL EQUIPMENT 83
5.4.1 Modem with Battery Backup 83
5.4.1.1 Initstrings 84
5.4.1.2 Wireless Modem 84
5.4.1.3 Battery Backup 85
5.4.2 PSU Redundancy 86
5.4.3 High Rejection Filter 86
6 MAINTENANCE 87
6.1 GENERAL 87
6.2 REPLACEMENT OF COMPONENTS 87
6.2.1 Power Supply 88
6.2.2 Battery Backup 89
6.2.3 Fan Unit 89
6.2.4 Modem 90
7 APPENDIX 91
7.1 ILLUSTRATIONS 91
7.1.1 Cabinet Drawings 91
7.1.2 Layout 93
7.2 SPECIFICATIONS 96
7.2.1 Electrical Specifications 96
7.2.2 Mechanical Specifications 98
7.2.3 Specifications for Optional Equipment 98
7.3 PARTSLISTS 99
7.3.1 Interface Unit 99
7.3.2 Node C 100
8 INDEX 101