13
Table 9 Receiver 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
output at
antenna
PTT to continuous
during the
performance check)
Frequency error to be
±150Hz
Rated Audio
Mode: GEN
Output level: 1.0mV RF
4th channel test frequency
◊
Mod: 1kHz tone at
3kHz deviation (1.5kHz
deviation for 12.5kHz
system)
Monitor: DVM: AC Volts
TEST MODE,
4 CSQ
PTT to OFF (center),
meter selector to
Audio PA
Set volume control to
3.74Vrms
Distortion
As above, except to
distortion
As above
As above
Distortion < 3.0%
Sensitivity
(SINAD)
As above, except SINAD,
lower the RF level for 12dB
SINAD.
As above
PTT to OFF (center)
RF input to be < 0.35µV
Noise Squelch
Threshold
(only radios
with
conventional
system need
to be tested)
RF level set to 1mV RF
As above
PTT to OFF (center),
meter selection to
Audio PA, spkr/load
to speaker
Set volume control to
3.74Vrms
As above, except change
frequency to a conventional
system. Raise RF level from
zero until radio unsquelches.
out of TEST
MODE; select a
conventional
system
As above
Unsquelch to occur at
< 0.25µV.
Preferred SINAD= 8-10dB
◊
See Table 6 or Table 8 as applicable.
Summary of Contents for SYMBOL MT2000 Series
Page 1: ...HT 1000 JT 1000 MT 2000 MTS 2000 and MTX Series Handie Talkie Portable Radios Service Manual ...
Page 2: ......
Page 24: ...2 Notes ...
Page 78: ...56 Notes ...
Page 147: ...Appendix A 9 Appendix Figure 2 Secure Module Location Detail ...
Page 169: ......
