User Manual

TR-800 Service Manual
-29-
tones to rated power,
check receiver’s
squelch open/off
sensitivity, with
signaling squelch
open sensitivity,
audio distortion &
Rx S/N
Squelch off sensitivity:
-118±3dBm
CCTSS squelch sensitivity:
-118±3dBm
CDCSS squelch sensitivity:
-118±3dBm
Audio distortion: ≤3%@3W
≤10%@5W
Rx S/N: ≥45dB (wide)
≥40dB (narrow)
Main radio
transmit
Any channel
without
tones
Communication
test set
Main radio
Tx
connector
/
Adjust the MIC
audio output
amplitude of
Analyzer to
6-10mVinto J0109
3pin; check Tx
frequency deviation
matching 60%
system Dev.; check
modulation
distortion and Tx
S/N
Tx frequency deviation:
3.0±0.2kHz (wide)
1.5±0.1kHz (narrow)
Modulation distortion: ≤3%
Tx S/N: ≥45dB (wide)
≥40dB (narrow)
b) Uni-directional Repeater Mode (Forward)
Make sure the TR-800 is in SETUP state and activate RPT function. The TR-800 operates on uni-directional
repeater mode with slave radio keys main radio to repeat transmission (forward direction). Correctly cable the test
ports to communication system analyzer before adjustment.
Measure Adjustment
Item Condition
Instrument Point Point Method
Specification/Remark
MONI
Any
channel
/ / MONI Check up
Long press monitor key, the
slave radio processes
monitoring, with green LED
flashes
Uni-direction
al repeater
(forward)
Channels
with/
without
tones
Communication
test set
Main radio
Tx
connector
RV0101
Adjust the signal
output amplitude of
Analyzer to
-47dBm, adjust
RV0101 to obtain a
60% system
deviation; check the
modulation
distortion and RX
S/N; decrease the
signal output
Duplex sensitivity:
-116(+1/-3dBm)
CTCSS sensitivity:
-116(+1/-3dBm)
CDCSS sensitivity:
-116(+1/-3dBm)
Repeater frequency deviation:
2.9±0.2kHz (wide)
1.4±0.1kHz (narrow)
Repeater audio distortion:
≤3%@3W