User's Manual

42/346 Issue 01 - April 2001 - Draft 04 3CC12426AAAA TQ BJA 01
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2.5.3 – Attaching a mounting plate and antenna to a pole
The following parts are required:
– an antennna with an attached X-Pol RBS Tx or X-Pol RBS Rx,
– a single-antenna mounting plate and mounting hardware (provided with the antenna), or a dual-
antenna mounting plate and mounting hardware (part number 90-7385-02).
The BS mounting hardware is composed of the following:
– downtilt adjustment screws,
– flat washers,
– lock washers,
– antenna bolts,
– U-bolts and U-bolt brackets,
– 17 mm nuts.
The dual antenna mounting plate can accommodate either one or two antennas. Single-antenna
configurations are used for non-redundant X-Pol RBS Tx or X-Pol RBS Rx operation, and double-
antenna configurations are used for redundant X-Pol RBS Tx or X-Pol RBS Rx operation.
To connect a mounting plate and antenna to a pole
1. Attach the mounting plate to the pole using the pole mounting hardware, as shown in Figure 12,
where a single antenna mounting plate is shown.
1. Thread the downtilt adjustment screw(s) into the mounting plate until the hole in the adjustment
screw plate aligns with the antenna bolt channel at the top of the mounting plate.
2. Connect the top of the mounting plate to the pole using a U-bolt, U-bolt bracket, washers and
nuts.
3. Tighten the two nuts until the top of the mounting plate is held securely to the pole, but is still
shifts enough from side-to-side to allow the bottom U-bolt to be inserted.
4. Connect the bottom of the mounting plate to the pole using a U-bolt, U-bolt bracket, washers and
nuts.
5. Tighten all four U-bolt nuts to 54.4 Nm, ± 2.7 Nm (40 ft-lb, ± 2 ft-lb) of torque.
Warning - If an antenna is attached to a mounting plate on a pole before an X-Pol RBS Tx
or X-Pol RBS Rx is attached to the antenna, the RF wave guide and screws must be covered
with weatherproof tape to protect the antenna from moisture.
Caution - Do not install an X-Pol RBS Tx and an X-Pol RBS Rx on the same mounting plate,
otherwise the X-Pol RBS Tx transmit signal will interfere with the X-Pol RBS Rx receive
signal.
Caution - Mounting poles should be grounded to a suitable lightning discharge ground.