TM 11-5895-846-14
tests are performed. Perform all tests in sequence at
DANGEROUS VOLTAGES EXIST IN
least once every three months during an operational
THIS EQUIPMENT. Do not attempt
period. For these tests it is assumed that ac power has
any removal or replacement unless
been applied to the terminnal for at least 15 minutes.
the equipment is in a non-operating
condition and all power circuit
8-6. Receiver Gain
breakers on the power distribution
panel are in the OFF position.
WARNING
The protective grounding terminals of
a. Test Method. Receiver gain is calibrated using ,
the
test
instrument
and
the
signal sources within the terminal in conjunction with
calibration equipment must be
precision attenuators and a low level SHF hard limiter, as
shown in figure 8-1. A signal at the local receiver
connected
to
the
equipment
frequency is obtained from the SHF LO output of the
grounding (safety) conductor of the
frequency synthesizer in the up converter drawer. The
power cords.
For electric shock
output level of this signal is between the limits of + 6 and
protection use only extension cords
+ 12 dBm, and is passed through the SHF hard limiter
and power receptacles with a safety-
and a 6 dB attenuator to provide a nominal -52 dBm
ground connector, or otherwise
signal at the 20 dB waveguide coupler on the AME
connect the chassis to a safety
subassembly, which gives a nominal -72 dBm signal at
ground system.
the LNA input.
8-2
