Motorola AAH38KDC9AA3 N, Basic Service Manual, Page: 64 / 87

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
<0.35
μ
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 <0.35
μ
V.
Preferred SINAD =
9-10dB
* See Table 4-4 on page 4-3.