5-4 Test Mode
* See Table 5-4
Table 5-5 Receiver Performance Checks
Test
Name
Communications
Analyzer
Radio Test Set Comments
Reference
Frequency
Mode: PWR MON
4th channel test frequency*
Monitor: Frequency error
Input at RF In/Out
TEST MODE,
Test Channel
4 carrier
squelch out-
put at
antenna
PTT to continu-
ous (during the
performance
check)
Frequency error to be
±200 Hz VHF
±600 Hz UHF
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
3.16Vrms
Distortion As above, except to distor-
tion
As above As above Distortion <3.0%
Sensitivity
(SINAD)
As above, except SINAD,
lower the RF level for 12dB
SINAD.
As above PTT to OFF
(center)
RF input to be <0.35µ
Noise
Squelch
Threshold
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 conven-
tional system
As above Unsquelch to occur at
<0.25µV.
Preferred SINAD =
9-10dB
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