4-4 PERFORMANCE TESTING
* See Table 4-4 Test Frequencies
Table 4-5 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
output at
antenna
PTT to
continuous
(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
distortion
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
<0.35mV
Noise
Squelch
Threshold
(only radios
with
conventional
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
<0.25mV.
Preferred SINAD =
9-10dB