Table 8. Receiver Performance Checks - Motorola ASTRO XTS 3500 Basic Service Manual

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Test Name
Reference
Mode: PWR MON 4th
Frequency
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;
(SINAD)
lower the RF level for 12dB
SINAD
Noise Squelch
RF level set to 1mV RF
Threshold (only
radios with
conventional
system need to
As above, except change
be tested)
frequency to a
conventional system. Raise
RF level from zero until
radio unsquelches.
See Table 7
12
Table 8 Receiver Performance Checks
System Analyzer
Radio
TEST MODE, 4
PTT to continuous
CSQ output at
(during the
antenna
performance check)
TEST MODE, 4
PTT to OFF (center);
CSQ
meter selector to Audio
PA
As above
As above
As above
PTT to OFF (center)
As above
PTT to OFF (center);
meter selection to
Audio PA; spkr/load to
speaker
Out of TEST
As above
MODE; select
a conventional
system
Test Set
Comments
Frequency error to
be ≤ ±1.0kHz
Set volume control
to 3.74Vrms
Distortion < 3.0%
RF input to be <
0.35µV
Set volume control
to 3.74Vrms
Unsquelch to
occur at < 0.25µV.
Preferred SINAD =
5-8dB

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