User Manual

SRU Installation
2-18 SRU Inst allat ion Manual 17286-1000 Rev. B 03/14/01
2.5 Inst allat ion of Coaxial Cable
A coaxial cable connects the SAS to the SRU. The cable generally must pass from an
indoor location of the SAS to an outdoor location of the SRU. When installing the cable,
consult local regulatory authorities and follow all local building codes. When laying out the
coaxial cable, include enough cable for a service loop of at least 18 inches (0.5 m) at the
SRU. When the main cable is LMR400, remember to use a 12-inch (0.30m) length of
LMR240 for the final connection to the SRU, to avoid overloading the connector due to the
weight of the LMR400 cable.
ATTENTION
F ollow local building codes when routing coaxial cables from the inside to the
outside of the site and when installing lightning arrestors.
2.5 .1
2.5 .12.5 .1
2.5 .1 Connect SRU Coax ial Cable
Connect SRU Coax ial CableConnect SRU Coax ial Cable
Connect SRU Coax ial Cable
Use the following procedure for connecting the coaxial cable to the SRU.
1. Install the lightning arrestors in the cable
2. E nsure that the connectors are dry and free of corrosion. Even a small
amount of dampness could cause corrosion, and signal a weak spot. Connect
the coaxial cable to the TNC connector on the SRU.
3.
3.3.
3. Wrap the connection with self-amalgamating weatherproof tape. Make sure
that the tape completely covers the connector and the heatshrink of the
cable. The tape must extend up the cable.
4. Tie wrap the cable to the pole leaving an 18 inch (0.5 m) service loop. Be sure
the service loop has a 6” (15.24cm) drop pointing down so that water drains
away from the connector. Avoid positioning any connector junction at a low
point in the service loop.
WARNING
Install and connect the coaxial cable between the SA S and the SRU prior to turning on
the unit.