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RF Test Mode 3-5
Table 3-6 Receiver Performance Checks
* See Tables 3-4.
Test Name Communications Analyzer Radio Test Set Comment
Reference
Frequency
Mode: PWR MON
4th channel test frequency*
Monitor: Frequency error
Input at RF In/Out
TEST MODE,
Test Channel 4
carrier squelch
output at
antenna
PTT to
continuous
(during the
performance
check)
Frequency error to
be: ±186 Hz VHF1
±200 Hz VHF2
±568 Hz UHF2
±600 Hz UHF3
Rated Audio Mode: GEN
Output level: 1.0mV RF
4th channel test frequency*
Mod: 1kHz tone at
3kHz deviation
Monitor: DVM: AC Volts
TEST MODE
Test Channel 4
carrier squelch
PTT to OFF
(center),
meter selector
to Audio PA
Set volume control
to 8.10Vrms
Distortion As above, except to distortion As above As above Distortion <5.0%
Sensitivity
(SINAD)
As above, except SINAD,
lower the RF level for 12dB
SINAD.
As above PTT to OFF
(center)
RF input to be
<0.3µV
Noise
Squelch
Threshold
(only radios
with
conventiona
l system
need to be
tested)
RF level set to 1mV RF As above PTT to OFF
(center),
meter
selection to
Audio PA,
spkr/ load to
speaker
Set volume control
to 3.16Vrms
As above, except change
frequency to a conventional
system. Raise RF level from
zero until radio unsquelches.
out of TEST
MODE; select a
conventional
system
As above Unsquelch to occur
at <0.25µV.
Preferred SINAD =
9-10dB