3-4 TRANSCEIVER PERFORMANCE TESTING
Table 3-5 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 continuous
(during the
performance
check)
Frequency error to
be ±200 Hz VHF
±500 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 3.46Vrms
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
<0.30µV (0.25 µV
typical).
Noise
Squelch
Threshold
(only radios
with conven-
tional sys-
tem 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 3.46Vrms
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 =
6-9 dB
* See Table 3-4
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