User guide

Installing antennas and IRFUs Chapter 5: Installation
5-70
phn-2513_004v000 (Oct 2012)
Installing antennas and IRFUs
Applies to IRFU deployments only.
This section describes how to install an IRFU with antenna and waveguide.
Install the antenna and flexible waveguide by following their manufacturers’ instructions.
The waveguide must be long enough to connect to the IRFU branching unit in its rack.
Preparation
Before installing the IRFU, ensure the following are provided:
• IF cable for CMU and IRFU (Cambium part number 30009403001).
• A -48 V dc
power source.
• Access to the building ground terminal.
• All required tools (Table 216).
Table 216 Tools required for IRFU installation
Item Required specifications Where used
Screwdriver Phillips #2, medium tip Throughout
Allen key For #8-32 socket-head
screws
For connecting the flexible
waveguide to the IRFU
Multimeter With ohm meter
For connecting the CMU to
the IRFU
Miscellaneous tools for
installing connectors on
the CMU to IRFU
coaxial cable
Refer to the manufacturer
documentation provided with
the connector
Torque wrench for SMA
connectors
5/16, set to 0.1 kg•m
(9.0 lb-inch)