TR-800 Service Manual
59
(25kHz) current channel and select “wide”
to initialize test frequency before
performing wideband specs adjustment
and so does narrowband channel. DO NOT
perform wideband tuning by entering
tuning mode from a narrowband (12.5kHz)
channel and vice versa.
Rx Filtered
audio output
Channel without tones
CSA
J0103_5
/
Check the audio output amplitude of 5pin on
the accessory connector
Audio output: =780±50 mV
Rx Flat audio
output
Channel without tones
CSA
J0103_7
Check the audio output amplitude of 7pin on
the accessory connector
Audio output: =400±50 mV
c) Uni-directional Repeater Mode (reverse)
Make sure TR-800 is in setup mode and activate OPT function. TR-800 operates in uni-directional repeater mode with the master radio keying the slave radio to repeat
transmission (backward direction). Correctly cable the test ports to communication system analyzer before adjustment.
Measure Adjustment
Procedure Condition
Instrument
Testing
Point
Adjusting
Point
Method
Specification/Remark
Tx Test (Slave
radio)
Channel without tones.
Signal Generator
AF1: 1kHz
CSA
Tx
connector
(Slave
radio)
/
Adjust the modulation signal output of CSA to
6-10mV and inject it to J0109_3 to get a 60%
system Deviation; check modulation distortion
and Tx S/N
Tx frequency deviation:
3.0±0.2kHz (25kHz)
1.5±0.1kHz (12.5kHz)
Modulation distortion:
≤
3%
Tx S/N:
≥
45dB (25kHz)
≥
40dB (12.5kHz)
Содержание TR-800
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