Installation Guide

BTR 28 GHz Release 1.2 1-11
BTR 28 GHz Installation Guide
Installing the BTR 28 GHz
Installation is performed in three separate operations:
• attaching the antenna
• installing the tower equipment
• installing the indoor equipment
Attaching the Antenna
Attach the antenna to the BTR as follows:
Ensure that you attach the antenna to the BTR radio at the base station
prior to mounting the BTR 28 GHz to the pole.
1. Align the antenna with the two dowel pins that act as an index.
2. Place the flat washer against the antenna flange, followed by the lock
washer and then the screw.
3. Use an Allen wrench # 8 to hard tighten the socket head cap screw to a
maximum of 28 inch-pounds torque.
4. Complete steps 4 and 5 for all eight socket head cap screws.
5. Ensure that the screw is inserted at the top of the antenna to prevent water
entering the antenna. However, loosen it halfway. The bottom screw is
removed to allow condensation to drain from the antenna.
See Figures 1- 10 and 1- 11.
Note: This is a redundant radio system and two BTRs need to be
mounted close to each other. One radio is active and the other one is a
stand-by. When the BTRs are mounted side by side, ensure that the
spacing between the antennas is a minimum 6 inches (for 15, 30, 45, 60,
and 90° sectors). When the BTRs are mounted one on top of the other,
ensure that the spacing between the antennas is a minimum 1 inch (this is
applicable to a 9 elevation beam width.