3-8 Transceiver Performance Testing Display Model Test Mode
* See Table 3-4
Table 3-6. 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
continuously
transmit
(during the
performance
check)
Frequency error to be
±201Hz for UHF
±68Hz for VHF
Rated Audio Mode: GEN
Output level: 1.0mV RF
6th channel test
frequency*
Mod: 1kHz tone at
3kHz deviation
Monitor: DVM: AC Volts
TEST MODE
Test Channel 6
carrier squelch
PTT to OFF
(center), meter
selector to Audio
PA
Set volume
control to 2.83 Vrms
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
<0.35μV
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,
speaker/load to
speaker
Set volume
control to 2.83Vrms
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
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