Table 4-6: Transmitter Performance Checks - Motorola HT750 - UHF/VHF/Low Band - Radio Service Manual

4-8
(Models with "G" in location 10 of model number EX:AAH25RDH9GB6AN)
Test
Service Monitor
Name
Reference Mode: PWR MON
Frequency 4th channel test frequency*
Monitor: Frequency error
Input at RF In/Out
Power RF
Voice Mode: PWR MON
Modulation 4th channel test frequency*
(internal) atten to -70, input to RF In/
Voice Mode: PWR MON
Modulation 4th channel test frequency*
atten to -70, input to RF In/
Monitor: DVM, AC Volts
Set 1 kHz Mod Out level for
0.025Vrms at test set,
80mVrms at AC/DC test set
High-Speed
Data Modu-
lation***
Low-Speed
Data Modu-
lation
800,UHF
DTMF
Modulation 4th channel test frequency*
PL/DPL
Modulation 4th channel test frequency*
*** MDC
* See Table 4-4

Table 4-6: Transmitter Performance Checks

As above
Out
Out
jack
As above
As above
As above,
As above
BW to narrow
Radio Test Set
TEST MODE, PTT to continu-
Test Channel ous (during the
4 carrier performance
squelch check)
As above As above
TEST MODE, Remove modu-
Test Channel lation input
4 carrier
squelch out-
put at
antenna
As above As above, meter
selector to mic
TEST MODE, PTT to continu-
Test Channel ous (during the
4 high speed performance
output at check).
antenna
TEST MODE, PTT to continu-
Test Channel ous (during the
4 TLS output performance
at antenna check)
TEST MODE, As above
Test Channel
4 DTMF out-
put at
antenna
TEST MODE, As above
Test Channel
4
TPL
DPL
Transceiver Performance Testing
Comments
Frequency error
±200 Hz VHF
±600 Hz UHF
±60 Hz Low Band
Refer to Specifications
Press PTT switch on
radio. Say "four" loudly
into the radio mic.
Measure deviation:
VHF, UHF, 800 MHz,
Low 1 and Low 2:
≥ 4.0 kHz but ≤ 5.0 kHz
(25 kHz Ch Sp)
Deviation:
VHF, UHF, 800 MHz,
Low 1 and Low 2
≥ 4.0 kHz but ≤ 5.0 kHz
(25 kHz Ch Sp) Global.
5 kHz (20 kHz Ch Sp)
U.S. and Canada.
Deviation: 800 MHz,
VHF, UHF, Low 1 and
Low 2: ≥ 2.5 kHz but
≤ 3.5 kHz (25 kHz Ch
Sp)
Deviation:
VHF, UHF, 800MHz, :
≥500Hz but ≤ 1000Hz
(25 kHz Ch Sp).
Deviation:
VHF, UHF, 800MHz,
Low 1and Low 2:
≥ 3.05 kHz but ≤ 3.45
kHz (25 kHz Ch Sp)
Deviation:
VHF, UHF, 800MHz,
Low 1 and Low 2:
≥500Hz but ≤ 1000Hz
(25 kHz Ch Sp).