Motorola SYMBOL MT2000 Series, Руководство по обслуживанию

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14
Table 10 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,
4 CSQ PTT to continuous
(during the
performance
check). Frequency error to be < 150Hz.
Power RF As above. As above, 4
CSQ As above. Refer to Maintenance Specifica
tions 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 1kHz
Mod Out level for 0.025Vrms at test
set, 80mVrms at AC/DC test set jack
As above, 4
CSQ As above, mete
selector to mic. Deviation:
VHF, UHF, and 800MHz:
≥
3.6kHz but
≤
5.0kHz.
Low-Speed
Data Modulation
800/900 UHF As above. TEST MODE
4TLS
output at
antenna PTT to continuous
(during the
performance
check). Deviation:
UHF, 800MHz:
≥
500Hz but
≤
1000Hz.
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:
VHF, UHF, and 800MHz:
≥
3.8kHz but
≤
5.0kHz.
900MHz:
≤
2.5kHz.
High-Speed
Data
Modulation*** As above. TEST MODE,
4 THS,
output at
antenna. PTT to continuous
(during the
performance
check). Deviation:
UHF and 800MHz:
≥
2.4kHz but
≤
3.6kHz.
900MHz:
≥
1.52kHz but
≤
1.95kHz.
DTMF
Modulation As above,
4th channel test frequency
◊
TEST MODE,
4 DTMF,
output at
antenna. As above. Deviation:
VHF, UHF, and 800MHz:
≥
3.05kHz but
≤
3.45kHz.
900MHz:
≥
1.5kHz but
≤
1.9kHz.
PL/DPL
Modulation
(radios with
conventional,
clear mode,
coded squelch
operation only) Change frequency to a
conventional transmit
frequency, BW to narrow. Conventional
coded squelch
personality
(clear mode
operation).
4 TPL
4 DPL As above. Deviation:
VHF, UHF, and 800MHz:
≥
500Hz but
≤
1000Hz.
900MHz:
≥
250Hz but
≤
500Hz.
Talk-around
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
Mod: 1kHz Out level for 25mVrms
at test set. Conventional
talk-around
personality
(clear mode
operation).
1 CSQ As above. Deviation:
UHF and 800MHz:
≥
3.8kHz
but
≤
5.0kHz.
900MHz:
≥
1.95kHz but
≤
2.45kHz.
Talk-around
Modulation
(radios with
conventional,
secure 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
Mod: 1kHz Out level for 25mVrms
at test set. Conventional
talk-around
personality
(secure mode
operation).
Load key into
radio
1 Sec. As above. Deviation:
UHF and 800MHz:
≥
3.6kHz
but
≤
4.4kHz.
* 800 MHz radios only
** The secure mode, talk-around modulation test is only required for trac mode radios which
do not have clearmode talk-around capability.
*** Trunked Only
∆
When testing voice modulation in the continuous mode, AGC must be disabled.
◊
See Table 6 or Table 8 as applicable.