Setup Manual

Establishing Connections
Antenna Connection
The BSU and SU radios are equipped with an N-
type female connector at the antenna port.
You can use a short length jumper cable (such
as ¼- to ½-inch coax or pigtail of approximately
6 feet in length) fitted with two N-type male
connectors to connect the antenna port to the
antenna (if the unit is located near the antenna)
or to the primary transmission line (if the unit is
mounted remotely from the antenna).
A low-loss 50-ohm cable is recommended for the
antenna transmission line between the BSU/SU
and the antenna (such as Andrew LDF4-50 or
Times LMR-600 1/2-inch coaxial cable, an
Andrew LDF4.5-50 or Times LMR-900 5/8-inch
coaxial cable, or an EW-52 waveguide).
The return loss presented by the transmission
line at the BSU/SU interface should be as high
as possible (20 dB minimum recommended).
The length of the antenna transmission line
should be kept as short as possible to minimize
loss.
Antenna Cabling Guidelines for 5.8 GHz
Units
▪ Coaxial cables of
7
/
8
-inch or larger diameter
can exhibit moding at 5.8 GHz and are never
recommended. Also, some small diameter
cable types, such as RG-8, have high loss or
poor VSWR at these frequencies. If small
diameter cables are required, be certain to
keep the lengths of these cables as short as
possible.
▪ For wave guide transmission line at 5.8 GHz,
EW-52 wave guide is recommended. EW-63
also works, but exhibits more loss.
▪ Do not use right-angle N-type connectors
with the BSU/SU radios operating at 5.8 GHz
unless the connector has been specifically
rated and tested up to 5850 MHz. Unless
specifically designed for these frequencies,
these connectors can present high loss at
these frequencies.
▪ Do not use low quality jumper cables with
the radios.
▪ Always precisely follow manufacturer’s
recommended procedures and tools for
termination.
BSU/SU RF Connections
Prepare the RF transmission line feeder cable as
follows:
1. Cut the cable to the approximate length
(allowing some excess).
2. Install the appropriate connector on the
antenna or BSU/SU end: Place tape or a
covering over the connector end so that
debris cannot harm the connector.
8 Connecting External Antennas to the BSU and SU
Draft Date: 02/25/03 CPN 000000