User's Manual

3CC12426AAAA TQ BJA 01 Issue 01 - April 2001 - Draft 04 67/346
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Table 23 describes the requirements for both non-redundant and redundant X-Pol RBS Tx/X-Pol RBS
Rx synchronization reference cable configurations.
Table 24 lists the cables and connectors recommended for use as synchronization reference cables. If
the listed cable types are unavailable, the same cable type that is used to connect the X-Pol RBS Txs
and X-Pol RBS Rxs to the lightning arresters may be used, with connectors appropriate for that cable
type.
Table 23: Synchronization reference cable configuration requirements
Note:
(1)
2:1 Combiner/Splitter 1 is for the X-Pol RBS Tx/R-X-Pol RBS Tx pair. 2:1 Combiner/Splitter 2
is for the X-Pol RBS Rx/R-X-Pol RBS Rx pair.
Table 24: Recommended synchronization reference cables and connectors
To connect synchronization reference cables (non-redundant X-Pol RBS Tx/X-Pol RBS Rx
configuration)
1. Measure and cut a length of cable long enough to run between the X-Pol RBS Tx and X-Pol RBS
Rx, including the distance required to run up each pole to the X-Pol RBS Tx and X-Pol RBS Rx
connectors.
2. Install an N(M) connector on each end of the cable.
3. Run the cable between the X-Pol RBS Tx and X-Pol RBS Rx.
4. Connect the cable to the X-Pol RBS Tx and X-Pol RBS Rx (100 MHz reference connectors).
5. Secure the cable according to the manufacturer’s recommendations.
Configuration Cable requirements Connector
Non-redundant
X-Pol RBS Rx and
X-Pol RBS Tx
X-Pol RBS Rx to X-Pol RBS Tx 90° N(M)-90° N(M)
Redundant
X-Pol RBS Rx and
redundant
X-Pol RBS Tx
X-Pol RBS Tx (primary) to 2:1 Combiner/Splitter 1
(1)
90° N(M)-N(M)
R-X-Pol RBS Tx (redundant) to 2:1 Combiner/Splitter 1 90° N(M)-N(M)
X-Pol RBS Rx (primary) to 2:1 Combiner/Splitter 2 90° N(M)-N(M)
R-X-Pol RBS Rx (redundant) to 2:1 Combiner/Splitter 2 90° N(M)-N(M)
One cable from 2:1 Combiner/Splitter 1 to 2:1 Combiner/Splitter 2 N(M)-N(M)
Redundant
X-Pol RBS Tx,
single
X-Pol RBS Rx
X-Pol RBS Tx (primary) to 2:1 Combiner/Splitter 1 90° N(M)-N(M)
R-X-Pol RBS Tx (redundant) to 2:1 Combiner/Splitter 1 90° N(M)-N(M)
X-Pol RBS Rx (primary) to 2:1 Combiner/Splitter 2 90° N(M)-N(M)
Unconnected 2:1 Combiner/Splitter 2 connector
50 9 terminator,
weatherproof
One cable from 2:1 Combiner/Splitter 1 to 2:1 Combiner/Splitter 2 N(M)-N(M)
Cable type Connectors Connector part number
Heliax LDF2-50
N(M)
90° N(M)
L2PNM
L2PNR-HC