68009328001-A October, 2009
Performance Checks: RF Test Mode 4-5
* See Table 4-4
Table 4-6. 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
* See Table 4-4
TEST MODE,
Test Channel 4
carrier squelch
Output at
antenna
PTT to continu-
ous (during the
performance
check)
Frequency error to be
±186 Hz VHF1
±200 Hz VHF2
±525 Hz UHF1
±568 Hz UHF2
±600 Hz UHF3
Power RF As above As above As above Refer to Maintenance
Specifications
Voice
Modulation
Mode: PWR MON
4th channel test frequency
*
atten to -70, input to RF In/
Out
Monitor: DVM, AC Volts
Set 1 kHz Mod Out level for
0.025 Vrms at test set,
80m Vrms at AC/DC test set
jack
As above As above, meter
selector to mic
Deviation:
VHF, UHF
≥ 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 modula-
tion input
Press PTT switch on
radio. Say “four” loudly
into the radio mic.
Measure deviation:
VHF, UHF
≥ 4.0 kHz but ≤ 5.0
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:
VHF, UHF
≥ 3.05 kHz
but
≤ 3.45 kHz
(25 kHz Ch Sp)
PL/DPL
Modulation
As above
4th channel test frequency
*
BW to narrow
TEST MODE,
Test Channel 4
TPL
DPL
As above Deviation:
VHF, UHF
≥ 500 Hz
but
≤ 1000 Hz
(25 kHz Ch Sp).
To Next Page
Loading...
