Performance Checks - Motorola GTX 2000 Service Manual

GTX/GTX LTR/LTS 2000 Portable Radios Service Manual

Performance Checks

Performance Checks
TEST
NAME
Reference Mode: PWR MON
Frequency 2nd channel test frequency Monitor.
Frequency error input at RF In/Out
Power RF Same as Above
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
0.025Vrms at test set,
80mVrms at AC/DC test set jack.
Low-Speed Data Same as Above
Modulation
800/900
Voice Modulation Mode: PWR MON
(Internal) 2nd channel test frequency
atten to -70, input to RF In/Out
High-Speed Data Same as Above
Modulation
DTMF Modulation Same as Above
(# SIGN) 2nd channel test frequency
PL/DPL Change frequency to a
Modulation (radios conventional transmit
with conventional frequency, BW to narrow
coded squelch
operation only)
Talk-around Change frequency to conventional
Modulation (radios talk-around frequency.
with conventional Mode:PWR MON
talk-around deviation, attenuation to -70,
operation only) input to RF In/Out
Monitor: DVM, AC volts
Set 1kHz Mod Out level for
25mVrms at test set.
June 1999
Table 5-4 Transmitter Performance Checks
COMMUNICATION
ANALYZER
RADIO TEST SET
TEST MODE, PTT to continuous
Display: 2 0 (during the
performance check)
TEST MODE, Same as Above
Display: 2 0
TEST MODE, Same as Above,
Display: 2 0 meter selector to mic
TEST MODE, PTT to continuous
Display: 2 1 (during the
performance check)
TEST MODE, Remove modulation
Display: 2 0 input
TEST MODE, PTT to continuous
Display: 2 2 (during the
performance check)
TEST MODE, Same as Above
Display: 2 3
output at antenna
Conventional coded Same as Above
squelch personality
Conventional talk- Same as Above
around personality
68P02945C75-A
COMMENTS
Frequency error to be
< 700 Hz
Refer to Performance
Specification Page XIII
Deviation:
≥3.6 kHz but ≤ 5.0 kHz
Deviation:
≥800 Hz but ≤ 1200 Hz
Press PTT switch on radio.
Say "four" loudly into the
radio mic. Measure deviation:
≥3.8 kHz but ≤5.0 kHz
Deviation:
≥2.3 kHz but ≤3.8 kHz
Deviation:
≥2.8 kHz but ≤3.8 kHz
Deviation:
≥500 Hz but ≤1000 Hz
Deviation:
≥3.8 kHz but ≤5.0 kHz
5-3