Table 10.Transmitter Performance Checks - Motorola ASTRO XTSTM 2500 Basic Service Manual

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