Motorola SL1M, Service Manual

Page: 41 / 89

Transceiver Performance Testing Test Mode 3-5
Table 3-4. Transmitter Performance Checks
Test
Name
Communications
Analyzer
Radio Test Set Comments
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
continuously
transmit
(during the
performance check) Frequency error to be
±201Hz for UHF
±68Hz for VHF
Power RF As above As above As above Low Power:
1 W (VHF/UHF)
High Power (Analog):
2 W (VHF/UHF)
High Power (Digital):
3 W (VHF/UHF)
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 As above As above, meter
selector to mic Deviation:
≥
4.0 kHz but
≤
5.0
kHz (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 Press PTT switch on
radio. Say “four”
loudly into the radio
mic. Measure
deviation:
≥
4.0 kHz but
≤
5.0
kHz (25 kHz Ch Sp)
TPL
Modulation As above
4th channel test
frequency*
BW to narrow TEST MODE,
Test Channel 4
TPL As above Deviation:
≥
500Hz but
≤
1000Hz
(25 kHz Ch Sp).
RF Power DMR mode. Slot 1
Power and Slot 2
Power TEST MODE,
Digital Mode,
transmit
without
modulation Key up radio
without modulation
using Tuner TTR Enable is
needed and IFR to be
set to trigger mode
with signal level
~1.5V
FSK Error DMR Mode. FSK Error TEST MODE,
Digital Mode,
transmit with
O.153 test
pattern Key up radio with
O.513 test pattern
modulation using
Tuner Not Exceed 5%
Final Draft