Motorola ASTRO Digital XTS 3000 Базовое руководство по обслуживанию - Страница 21
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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 1kHz 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; BW to narrow
tional, clear
mode, coded
squelch oper-
ation only)
Talkaround
Change frequency to
Modulation
conventional talk-
(radios with
around frequency.
conventional,
Mode: PWR MON
clear mode,
deviation, attenuation to
talk-around
–70, input to RF In/Out.
operation
Monitor: DVM, ac volts
only)
Set 1kHz Mod Out level
for 25mVrms at test set.
Talkaround
Change frequency to
Modulation
conventional talk-
(radios with
around frequency.
conventional,
Mode: PWR MON
secure mode,
deviation, attenuation to
talkaround
–70, input to RF In/Out.
operation
Monitor: DVM, ac volts
only) (**)
Mod: 1kHz out level
for25mVrms at test set.
*
800MHz radios only
**
The secure mode, talkaround modulation test is only required for trac mode radios which do not have clear mode
talkaround capability.
See Table 6
Table 8 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
Conventional
talkaround
personality
(secure mode
operation).
Load key into
radio 1 sec.
Test Set
Frequency error to be ≤
PTT to continuous
±1.2kHz.
(during the
performance check).
As above
Refer to Maintenance
Specifications page in
front of manual.
Deviation: 800MHz: ≥
As above, meter
3.6kHz but ≤ 5.0kHz
selector to mic
Remove modulation
Press PTT switch on radio.
input
Say "four" loudly into the
radio mic. Measure
deviation: 800MHz: ≥
3.8kHz but ≤ 5.0kHz
Deviation: 800MHz: ≥
As above
500Hz but ≤ 1000Hz
Deviation: 800MHz: ≥
As above
3.8kHz but ≤ 5.0kHz
Deviation: 800MHz: ≥
As above
3.6kHz but ≤ 4.4kHz
Comments
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