Introduction
TetraNode Base Station System Manual
3.1 Equipment room requirements ..........................................................................33
3.1.1 Equipment-room earth .................................................................................34
3.2 Installation – floor standing cabinets .................................................................34
3.2.1 Ventilation and cooling .................................................................................35
3.3 Installation – wall mounting cabinets .................................................................35
3.3.1 Ventilation and cooling .................................................................................36
3.4 Power-supply and Earthing ...............................................................................36
3.4.1 Earthing .......................................................................................................36
3.4.2 AC Power cables .........................................................................................37
3.4.3 DC Power cables .........................................................................................37
3.4.4 Power supply ...............................................................................................37
3.4.5 Un-Interruptible power / 3rd party supplies ..................................................37
3.5 Network Connections ........................................................................................38
3.5.1 V.11 bandwidth/network requirements .........................................................38
3.5.2 IP bandwidth/network requirements .............................................................38
3.6 Antenna system .................................................................................................39
3.6.1 General considerations ................................................................................39
3.6.2 Lightning protection ......................................................................................40
3.6.3 Diversity reception ........................................................................................42
3.6.4 Single Receiver antenna operation ..............................................................43
3.6.5 Dual Antenna operation ................................................................................43
3.6.6 Triple Antennas .............................................................................................44
3.6.7 Receiver Multi-Coupler, Low Noise Amplifier, Splitter ..................................45
3.6.8 Transmitter requirements ..............................................................................45
3.6.9 Passive inter-modulation considerations ......................................................45
3.6.10 Minimization of exposure to non-ionizing radiation .....................................46
3.7 Transceiver Configuration ...................................................................................50
4 Maintenance and replacement ............................................ ..................51
4.1
4.2
4.3
4.4
4.5
4.6
General ..............................................................................................................51
Maintenance policy ............................................................................................51
Maintenance ......................................................................................................51
Replacement of an R-8070 ................................................................................52
Replacement of an RMC ....................................................................................53
Replacement of a TBS-SYN ...............................................................................53
5 Troubleshooting .......................................................................................54
5.1 General ..................................................................................................................54
5.2 R-8070 Alarm messages .......................................................................................54
6 Transceiver Test Instructions (with TNX/NMT) .........................................57
Issue 1.0, August 2010
vii
