a. First obtain your assigned operating and alternate frequencies.
b. Be sure that all coaxes and multiplexer are secure and properly assembled. Refer to
Insure all transceivers have their power source grounds joined
together at the multiplexer ground lug before connecting coax cables.
Connect an earth ground to the multiplexer ground lug.
c. Be sure that termination units are plugged into all vacant band-pass filter connectors on
the coupler prior to applying rf power.
The coarse tuning section of the tuning procedure must be performed
before the transceiver is keyed. Complete the rf tuning within approx-
imately 1 minute. The caution note in the procedure covers this.
Preliminary Checks. Prior to tuning, check the following conditions:
No other filters are tuned to,
of the frequency about
to be used. Refer
(2) Rf power input to each band-pass filter will not exceed a nominal 60 watts.
The antenna connector
of the coupler must
to a 50-ohm broadband antenna
such as AS-3166 (part of the OE-254/GRC antenna group).