Motorola Expert Series - Receiver Performance Checks

4-4 Test Mode
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
3.46Vrms
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 <0.35µ
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
3.46Vrms
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
<0.35µV.
Preferred SINAD =
9-10dB
* See Table 4-4 on page 4-3.