Transmitter Performance Checks; Table 5-5. Transmitter Performance Checks - Motorola ASTRO XTL 5000 Basic Service Manual

700–800 mhz digital mobile radio
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5-6
Test Name
Sensitivity
As above, except SINAD, lower
(SINAD)
the RF level for 12 dB SINAD
Noise Squelch
RF level set to 1 mV RF
Threshold
(only radios with
conventional
As above, except change
system need to
frequency to a conventional
be tested)
system. Raise RF level from zero
until radio unsquelches.
* Test frequencies are listed in
5.5

Transmitter Performance Checks

Test Name
Reference
Mode: PWR MON
Frequency
1st channel test frequency**
Monitor: Frequency error
Input at RF In/Out
Power RF
As above
Voice Modulation
Mode: PWR MON
1st channel test frequency** atten
to –70,
input to RF In/Out,
Monitor: DVM, AC Volts
Set 1 kHz Mod Out level for
0.025 Vrms at test set,
80 mVrms at dummy microphone
or load box input
Voice Modulation
Mode: PWR MON
(internal)
1st channel test frequency** atten
to –70, input to RF In/Out
June 11, 2003
Table 5-4. Receiver Performance Checks (Continued)
System Analyzer
Table 5-2
.

Table 5-5. Transmitter Performance Checks

System Analyzer
Performance Checks: Transmitter Performance Checks
Radio
Test Condition
TEST MODE,
Release PTT
1 CSQ
switch.
TEST MODE,
Release PTT
1 CSQ
switch.
Out of TEST
Release PTT
MODE;
switch.
select a
conventional
system
Test
Radio
Condition
TEST MODE,
Press and hold
1 CSQ
PTT switch.
TEST MODE,
Press and hold
1 CSQ
PTT switch.
TEST MODE,
Press and hold
1 CSQ
PTT switch.
TEST MODE,
Remove
1 CSQ, output
modulation input
at antenna
from dummy
microphone or
load box.
Press and hold
PTT switch.
Comments
RF input to be
< 0.25 µV
Set volume control to
3.16 Vrms across the
speaker.
Unsquelch to occur at
< 0.25 µV
Comments
Frequency error to be
± 150 Hz (800 MHz)
Refer to the Radio
Specifications in the
front of the manual.
Deviation:
800 MHz:
>= 3.6 kHz but <= 5.0
kHz
See the Detailed
Service Manual for test
equipment
descriptions.
Press PTT switch on
microphone and say
"four" loudly into the
radio mic.
Measure deviation:
800 MHz:
>= 3.8 kHz but <= 5.0
kHz
See the Detailed
Service Manual for test
equipment
descriptions.
6881096C73-O

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