Motorola CDM1250, Basic Service Manual

Page: 40 / 92

3-6 Transceiver Performance Testing
Table 3-6: Transmitter Performance Checks
Test Name Communications Analyzer Radio Test Set Comment
Reference
Frequency
Mode: PWR MON
4th channel test frequency*
Monitor: Frequency error
Input at RF In/Out
TEST MODE,
Test Channel 4
carrier squelch
PTT to
continuous
(during the
performance
check)
Frequency error:
±150 Hz VHF,
±150 Hz UHF
±100 Hz LowBand
Power RF As above As above As above Low Power: 25-30W.
High Power: 45-54W
(VHF).
High Power: 40-47W
(403-470 MHz)
60-70W (LowBand)
Voice
Modulation
Mode: PWR MON
4th channel test frequency*
atten to -70, input to RF In/
Out
Monitor: DVM, AC Volts
Set 1kHz Mod Out level for
800mVrms at test set,
800mVrms at AC/DC test set
jack
As above As above,
meter selector
to mic
Deviation:
2.5 kHz Max. (12.5
kHz Ch. Sp).
4 kHz Max. (20 kHz
Ch. Sp).
5 kHz Max. (20 kHz
Ch. Sp. LowBand)
5 kHz Max. (25 kHz
Ch. Sp).
Voice
Modulation
(internal)
Mode: PWR MON
4th channel test frequency*
atten to -70, input to RF In/
Out
TEST MODE,
Test Channel 4
carrier squelch
output at
antenna
Remove
modulation
input
Deviation:
2.5 kHz Max. (12.5
kHz Ch. Sp.).
4 kHz Max. (20 kHz
Ch. Sp.).
5 kHz Max. (25 kHz
Ch. Sp.).
High-Speed
Data
Modulation*
*
As above TEST MODE,
Test Channel 4
high speed
output at
antenna
PTT to
continuous
(during the
performance
check).
Deviation:
1.6-1.9 kHz (12.5
kHz Ch. Sp.).
2.5-3.0 kHz (20 kHz
Ch. Sp.).
3.2-3.8 kHz (25 kHz
Ch. Sp.).
DTMF
Modulation As above,
4th channel test frequency* TEST MODE,
Test Channel 4
DTMF output
at antenna As above Deviation:
1.4-1.9 kHz (12.5
kHz Ch. Sp.).
2.3-3.0 kHz (20 kHz
Ch. Sp.).
2.9-3.8 kHz (25 kHz
Ch. Sp.).