Motorola GM338 Service Manual page 33

RF Test Mode
Test Name
Reference
Frequency
Power RF
Voice
Modulation
Voice
Modulation
(internal)
High-Speed
Data
Modulation**
DTMF
Modulation
PL/DPL
Modulation
* See 3-4
** MPT
Table 3-5 Transmitter Performance Checks
Communications
Analyzer
Mode: PWR MON
4th channel test fre-
quency*
Monitor: Frequency error
Input at RF In/Out
As above
Mode: PWR MON
4th channel test fre-
quency*
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
Mode: PWR MON
4th channel test fre-
quency*
atten to -70, input to RF
In/ Out
As above
As above,
4th channel test
frequency*
As above
4th channel test
frequency*
BW to narrow
Radio Test Set
TEST MODE, PTT to
Test Chan- continuous
nel 4 carrier (during the
squelch performance
check)
As above As above
As above As above,
meter selec-
tor to mic
TEST MODE, Remove
Test Chan- modulation
nel 4 carrier input
squelch out-
put at
antenna
TEST MODE, PTT to
Test continuous
Channel 4 (during the
high speed performance
output at check).
antenna
TEST MODE, As above
Test
Channel 4
DTMF output
at antenna
TEST MODE, As above
Test
Channel 4
TPL
DPL
3-5
Comment
Frequency error:
±150 Hz VHF,
±150 Hz UHF
Low Power:
0.8-1.4 W.
High Power:
25-30W
Deviation:
2.5 kHz Max.
(12.5 kHz Ch. Sp.).
4 kHz Max.
(20 kHz Ch. Sp.).
5 kHz Max.
(25 kHz Ch. Sp.).
Deviation:
2.5 kHz Max.
(12.5 kHz Ch. Sp.).
4 kHz Max.
(20 kHz Ch. Sp.).
5 kHz Max.
(25 kHz Ch. Sp.).
Deviation:
1.3-1.7 kHz
(12.5 kHz Ch. Sp.).
2.1-2.7 kHz
(20 kHz Ch. Sp.).
2.6-3.4 kHz
(25 kHz Ch. Sp.).
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.).
Deviation:
0.25-0.5 kHz
(12.5 kHz Ch. Sp.).
0.4-0.8 kHz
(20 kHz Ch. Sp.).
0.5-1.0 kHz
(25 kHz Ch. Sp.).