Motorola CP040 Basic Service Manual page 38

3-4
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 distor-
tion
Sensitivity As above, except SINAD,
(SINAD) lower the RF level for 12dB
SINAD.
Noise RF level set to 1mV RF
Squelch
Threshold
(only radios
with conven-
tional sys-
As above, except change
tem need to
frequency to a conventional
be tested)
system. Raise RF level from
zero until radio unsquelches.
* See Table 3-4
Table 3-5 Receiver Performance Checks
Radio
TEST MODE,
*
Test Channel
4 carrier
squelch out-
put at
antenna
TEST MODE
Test Channel
*
4 carrier
squelch
As above
As above
As above
out of TEST
MODE; select
a conven-
tional system
TRANSCEIVER PERFORMANCE TESTING
Test Set
PTT to continuous
(during the
performance
check)
PTT to OFF
(center),
meter selector to
Audio PA
As above
PTT to OFF
(center)
PTT to OFF
(center),
meter selection to
Audio PA, spkr/
load to speaker
As above
Comments
Frequency error to
be ±200 Hz VHF
±500 Hz UHF
Set volume control
to 3.46Vrms
Distortion <3.0%
RF input to be
<0.30µV (0.25 µV
typical).
Set volume control
to 3.46Vrms
Unsquelch to
occur at <0.25µV.
Preferred SINAD =
6-9 dB