Performance Checks
20
Table 10. Transmitter Performance Checks
Test Name System Analyzer Radio Test Set Comments
Reference
Frequency
Mode: PWR MON 4th
channel test frequency*
Monitor: Frequency error.
Input at RF In/Out
TEST MODE,
4 CSQ
PTT to continuous
(during the
performance check).
Frequency error to be ≤
±1.3 kHz.
Power RF As above As above,
4 CSQ
As above Refer to Maintenance
Specifications page in front
of manual.
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 0.025Vrms at test set,
80mVrms at ac/dc test set
jack
As above,
4 CSQ
As above, meter
selector to mic
Deviation: ≥ 4.1 kHz but ≤
5.0 kHz
Voice
Modulation
(internal)
Mode: PWR MON 4th
channel test frequency*
atten to –70, input to RF In/
Out
TEST MODE,
4 CSQ, output
at antenna
Remove modulation
input
Press PTT switch on radio.
Say “four” loudly into the
radio mic. Measure
deviation: ≥ 4.1 kHz but ≤
5.0 kHz
PL Modu-
lation (radios
with conven-
tional, clear
mode, coded
squelch oper-
ation only)
Change frequency to a
conventional transmit
frequency
Conventional
coded squelch
personality
(clear mode
operation) 4
TPL
As above Deviation: ≥ 500Hz but ≤
1000Hz
Talkaround
Modulation
(radios with
conventional,
clear mode,
talk-around
operation only)
Change frequency to
conventional talk-around
frequency.
Mode: PWR MON
deviation, attenuation to –
70, input to RF In/Out.
Monitor: DVM, ac volts
Set 1 kHz Mod Out level
for 25mVrms at test set.
Conventional
talkaround
personality
(clear mode
operation)
1 CSQ
As above Deviation: ≥ 4.1 kHz but ≤
5.0 kHz
*See Table 7 on page 16
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