TR-800 Service Manual
57
Linked Audio
Test
Channels without
tones.
Signal Generator
AF1: 1kHz
CSA
Tx
connector
(Master
Radio)
Programming
Software:Adjus
tment(Slave)
→
Tonegain
→
Ext.
Mic
Adjust the modulation signal output of CSA to
120mV and inject it to J0103_3.
Keys the transmitter and adjust Tx deviation to
60% System Dev. via programming software,
check modulation distortion and Tx S/N.
Note: Use the external PTT on the accessory
connector for transmission. DO NOT use the
front panel PTT.
Tx frequency deviation:
3.0±0.2kHz (25kHz)
1.5±0.1kHz (12.5kHz)
Modulation distortion:
≤
3%
Tx S/N:
≥
45dB (wide)
≥
40dB (narrow)
b) Uni-directional Repeater Mode (Forward)
Make sureTR-800 is in setup mode and activate RPT function. TR-800 operates in uni-directional repeater mode with the slave radio keying the master radio to repeat
transmission (forward direction). Correctly cable the test ports to the communication system analyzer before adjustment.
Measure Adjustment
Procedure Condition
Instrument
Testing
Point
Adjusting
Point
Method
Specification/Remark
Uni-directiona
l repeater
(forward
filtered audio)
Test
Channels with &
without tones.
Signal Generator
AF1:1kHz@3kHz/1.5k
Hz Deviation;
AF2:CTCSS/DCS@
0.75kHz/0.35kHz
Deviation
CSA
Tx
connector
(Master
Radio)
Programming
Software:
Adjustment(Sla
ve)
→
Tonegain
→
Fwd_Filtered
_Audio
Adjust the signal output amplitude of CSA to
-47dBm; adjust repeater audio deviation to
60% System Dev. Via the programming
software; check the modulation distortion and
Rx S/N; decrease the signal output amplitude
of CSA and check the duplex sensitivity.
Note: Enter tuning mode from a wideband
(25kHz) current channel and select “wide”
to initialize test frequency before
Duplex sensitivity:
-117(+1/-3dBm)
CTCSS sensitivity:
-117(+1/-3dBm)
CDCSS sensitivity:
-117(+1/-3dBm)
Duplex frequency deviation:
2.9±0.2kHz (25kHz)
1.4±0.1kHz (12.5kHz)
Duplex audio distortion:
Summary of Contents for TR-800
Page 17: ...TR 800 Service Manual 15 Figure 6 5 Figure 6 6 ...
Page 41: ...TR 800 Service Manual 39 Figure Ⅰ Block Diagram ...
Page 81: ...TR 800 Service Manual 79 Packing ...
Page 82: ...TR 800 Service Manual 80 TR 800 Wiring Diagram ...
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