User's Manual

66/346 Issue 01 - April 2001 - Draft 04 3CC12426AAAA TQ BJA 01
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5. After the cable run has been tested for signal losses, connect the IF jumper cable to the X-Pol RBS
Tx or X-Pol RBS Rx.
To connect the indoor IF cables
For each X-Pol RBS Tx and X-Pol RBS Rx:
1. Cut a length of indoor IF cable long enough to reach and connect the protected side of the RS-422
lightning arrester to the Bias-T.
2. Attach an N(M) connector to each end of the cable.
3. Run the cable between the RS-422 lightning arrester and the Bias-T. Secure the cable.
4. Connect the cable to the protected side of the lightning arrester.
5. Connect the cable to the Bias-T.
Connecting synchronization reference cables
The synchronization reference cable carries the synchronization signal between the X-Pol RBS Tx and
the X-Pol RBS Rx. In a redundant configuration, both X-Pol RBS Txs and both X-Pol RBS Rxs are
connected by 2:1 Combiner/Splitters that connect the signal from the active X-Pol RBS Rx to the active
X-Pol RBS Tx.
Figure 33 shows a redundant X-Pol RBS Tx/X-Pol RBS Rx synchronization reference cable
configuration.
Figure 33 – Reference cables for redundant X-Pol RBS Tx/X-Pol RBS Rx configurations
Note - If redundancy is planned in the future, use the redundant synchronization cable
configuration and install 50 W weatherproof terminators on the unused 2:1 Combiner/Splitter
connectors. This allows for future redundancy without disrupting service in order to
reconfigure the cables for redundancy.
X-Pol RBS Tx
R-X-Pol RBS Tx
X-Pol RBS Rx
R-X-Pol RBS Rx
BTS 2:1
Combiner/
Splitters
Synchronization
reference cable