TC-600 Service Manual
61
Transmitter
Item
Condition
Measurement
Adjustment
Specification
/Remarks
Test Instrument
Terminal
Parts
Method
1.Transmit
frequency
1. TX Center. Turn to CH12
in manual adjust mode and
press PTT.
Radio Communication
Test Set
ANT
TC6
Adjust it to center
frequency
Error
≤
±2 50Hz
2. Max.
Deviation
1. TX Center. Turn to CH12
in manual adjust mode and
press PTT.
Radio Communication
Test Set
LPF: 15KHz
AF:1KHz
120mV
ANT
MIC Jack
VR2
Adjust deviation to:
4.2kHz±100Hz(W)
2.2kHz±100Hz(N)
3.Modulati
on
Sensitivity
1. TX Center. Turn to CH12
in manual adjust mode and
press PTT.
Radio Communication
Test Set
FILTER:
0.3-3.4KHz
AF: 1KHz 13±3mV
ANT
MIC Jack
Check deviation:
2.2KHz-3.6KHz
4. CTCSS
Balance
1. TX Center. CTCSS:
67.0Hz. Turn to CH4 in
manual adjust mode.
Radio Communication
Test Set
LPF:300Hz
ANT
VR3
Adjust VR3 ,
deviation tested on
condition 1 and
condition 2 are
consistent, the
difference
≤
200Hz
67.0Hz
CTCSS
2. TX Center. CTCSS:
250.3Hz. Turn to CH4 in
manual adjust mode and
press PTT.
250.3Hz
CTCSS
5. CTCSS
Deviation
1. TX Center. CTCSS:
67.0Hz. Turn to CH4 in
manual adjust mode. Adjust
by PTT or Function key.
Radio Communication
Test Set
LPF: 300Hz
ANT
Adjust deviation to:
0.65kHz
±
100Hz(W)
0.35kHz
±
100Hz(N)
6. CDCSS
Deviation
1. TX Center.
CDCSS: 023. Turn to CH5 in
manual adjust mode. Adjust
by PTT or Function key.
Adjust deviation to:
0.65kHz
±
100Hz(W)
0.35kHz
±
100Hz(N)
7. DTMF
Deviation
TX center, turn to CH15 in
manual adjust mode
Radio Communication
Test Set
LPF: 15KHz
ANT
Observe
Deviation:
≤
3.5KHz(W)
≤
2.5KHz(N)
8.
Low
Battery
Alert Level
1. Turn to CH1 in manual
adjust mode. Adjust the
power supply voltage to 5.5V.
Adjust by PTT or Function
key.
Digital Voltmeter
Adjust the level to
make LED just
flash.
Note:
In Manual Adjust Mode, when channel selector knob is rotated to CH1-CH16, MIC jack can’
t
connect with external cables. After adjustment is completed, short out the two SELF points and then
turn the power on, the radio enters Model Set Mode. Then press PTT to disable the manual adjust
mode.