4-6
TRANSCEIVER PERFORMANCE TESTING
Table 4-6 Receiver Performance Checks
* See Table 4-4
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
±150 Hz VHF
±150 Hz UHF
±150 Hz LB
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
8.12Vrms
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
<0.3
µ
V
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
<0.25
µ
V.
Preferred
SINAD =
9-10dB
