Setup Manual

3. Pull the transmission line through the cable
ducts, trays, or conduit (as required) to the
antenna, while being careful not to kink or
damage the transmission line in any way.
Note: RF transmission line must never be bent,
twisted, or deformed in any way.
Pay close attention to the transmission line
specifications for bend radius when installing.
4. Support the transmission line in a tray on
horizontal runs and by hangers on vertical
runs. Space hangers according to the
manufacturer instructions (typically every
five feet under conditions of no ice and not
greater than 85 mph winds).
5. Ground the transmission line using the
manufacturer grounding kit. Grounding kits
attach to the outer copper conductor. Install
grounds at the antenna, at the bottom of the
antenna structure (if applicable), and where
the transmission line enters the building. Be
sure to ground long transmission line runs
every 100 feet.
6. Lightning suppression (such as Polyphaser
LSX) is required at the interconnection cable
junction as close as possible to the BSU/SU
when the cable is longer than 3 meters.
There should always be a lightning
protection device at the egress point for
whatever cables egress the building or
enclosure. Lightning arrestors must be
properly grounded to operate.
7. After installation, terminate the transmission
line with an N-type male connector or
adapter attached at the equipment end. For
wave guide, this typically requires a CPR-to-
N adapter.
Be sure to use manufacturer-specified
connectors and termination tools, and follow
termination instructions precisely. Improper
transmission line terminations can cause
excess losses and reflections that can lead to
many problems with the system.
8. Prior to operation, check the electrical
integrity of the transmission line, including
all connectors, with a simple DC check
between the center conductor and outer
conductor (this is neither possible, nor
required for wave guide). The transmission
line ideally should be connected directly to
the antenna at one end and to the BSU/SU
antenna port at the other end (through the
RF Lightning arrestor). However, short
pigtail jumper cables may be required to
avoid sharp bends in the primary
transmission line to limit stress on either
connection.
9. Connect the transmission line to the RF
connector on the BSU or SU. Create a drip
loop in the cable as shown in the figure
below, and tie the cable to the mast or pole
to remove any stress on the RF connector.
The drip loop allows any moisture on the
wires from rain or condensation to drip off.
[temporary
photo]
Connecting External Antennas to the BSU and SU 9
CPN 000000 Draft Date: 02/25/03