Kenwood TK-3107G, Service Manual

Page: 30 / 50

TK-3107G
30
ADJUSTMENT
Use the KPG-55D programming software for adjustment of the next item in PC Mode (see page 5).
Squelch Level, Transmit frequency, DQT Balance, RF Power, QT Deviation, DQT Deviation, Battery Level
Section Common to the Transmitter and Receiver (VCO)
Item Condition
Measurement Adjustment
Specifi cations / Remarks
Test-
equipment
Unit Terminal Unit Parts Method
1. Setting 1) Power supply voltage
Battery teriminal: 7.5V
2) SSG standard modulation
[Wide]
MOD: 1kHz, DEV: 3kHz
[Narrow]
MOD: 1kHz, DEV: 1.5kHz
2. VCO lock
voltage 1) CH: TX high Digital
voltmeter TX-RX CV TX-RX TC1 3.7V ±0.1V
2) CH: RX high TC2 3.7V ±0.1V
3) CH: TX low Check More than 1.0V
4) CH: RX low
Receiver Section
Item Condition
Measurement Adjustment
Specifi cations / Remarks
Test-
equipment
Unit Terminal Unit Parts Method
1. Band-pass
fi lter
1) CH: RX center
2) Tracking generator output
:
–40dBm
Connect the spectrum ana-
lyzer to TP2 terminal.
Tracking
generator
Spectrum
analyzer TX-RX ANT
TP2
TX-RX TC201
TC202
TC203 Adjust the frequency
so that it becomes
the spectrum wave-
form shown in Fig. 1.
2. AF level 1) CH: RX center
SSG output: –53dBm (501µV)
MOD:
1kHz
DEV: ±3.0kHz (Wide)
: ±1.5kHz (Narrow)
SSG
Oscilloscope
AF V.M
Distortion
meter ANT
SP L212 Adjust to the MAX
AF level
3. Sensitivity
(Wide) 1) CH: RX center
CH: RX Lo
CH: RX Hi
SSG
ouput: –116dBm (0.35µV)
MOD: 1kHz
DEV: ±3.0kHz
Check SINAD: 12dB or higher
(Narrow) 2) CH: RX center
SSG
output: –114dBm (0.45µV)
DEV: ±1.5kHz
4. Squelch
level
(PC
mode)
1) CH: RX center
MONI:
ON
PC
key Level 9
Adjust to close the
squelch. The squelch must be closed.
2) Level 9
SSG
output: –117dBm (0.36µV)
3) Level 3
SSG
output: –125dBm(0.126µV)
Level 3
Adjust to close the
squelch. The squelch must be closed.