Transceiver Performance Testing Display Model Test Mode 3-7
* See Table 3-4
Table 3-5. 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:
0.9 – 1.5W (VHF/
UHF)
High Power:
4.0 – 4.8W (UHF)
High Power:
5.0 – 5.8W (VHF)
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).
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