Motorola Expert Series Basic Service Manual page 48

4-4
Test Name Communications Analyzer
Reference Mode: PWR MON
Frequency 4th channel test frequency*
Monitor: Frequency error
Input at RF In/Out
Rated Audio Mode: GEN
Output level: 1.0mV RF
4th channel test frequency*
Mod: 1kHz tone at
3kHz deviation
Monitor: DVM: AC Volts
Distortion As above, except to distortion
Sensitivity As above, except SINAD, lower
(SINAD) the RF level for 12dB SINAD.
Noise Squelch RF level set to 1mV RF
Threshold (only
radios with
conventional
system need to
be tested)
As above, except change
frequency to a conventional
system. Raise RF level from
zero until radio unsquelches.
* See Table 4-4 on page 4-3.
Table 4-5 Receiver Performance Checks
Radio
TEST MODE,
Test Channel 4
carrier squelch
output at
antenna
TEST MODE
Test Channel 4
carrier squelch
As above
As above
As above
Out of TEST
MODE; select a
conventional
system
Test Set
PTT to continuous Frequency error to be
(during the ±200 Hz VHF
performance ±600 Hz UHF
check)
PTT to OFF Set volume control to
(center), meter 3.46Vrms
selector to Audio
PA
As above Distortion <5.0%
PTT to OFF RF input to be <0.35µ
(center)
PTT to OFF Set volume control to
(center), meter 3.46Vrms
selection to Audio
PA, spkr/load to
speaker
As above Unsquelch to occur at
<0.35µV.
Preferred SINAD =
9-10dB
Test Mode
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