Kenwood TK-7160 Service Manual page 31

Item Condition
4. RF 1) CH : RX center (Wide)
bandpass CH : RX low (Wide)
filter CH : RX high (Wide)
2) Tra generator output : –30dBm
Connect the spectrum analyzer
to BPF terminal
* Adjustment of TX VCO lock voltage
1. Remove R517, F501, R519 and R526 (all on component side).
2. Remove PCB from chassis.
3. Transmit and check voltage at [CV] point.
Warning : Do not transmit if step "1." is not complete.
4. Adjust of voltage can be done by tuning TC442.
Receiver Section
Item Condition
1. Seisitivity 1) CH : RX low (Wide/Narrow)
CH : RX center (Wide/Narrow)
CH : RX high (Wide/Narrow)
2) SSG output
: –118dBm (0.28µV) (Wide)
: –116dBm (0.35µV) (Narrow)
Mod : 1kHz
Dev : ± 3.0kHz (Wide)
Dev : ± 1.5kHz (Narrow)
2. Squelch 9 1) CH : RX low (Wide)
CH : RX center (Wide/Narrow)
CH : RX high (Wide)
2) SSG output
: 12dB SINAD+7dB
Mod : 1kHz
Dev : ± 3.0kHz (Wide)
Dev : ± 1.5kHz (Narrow)
3. Squelch 1 1) CH : RX low (Wide)
CH : RX center (Wide/Narrow)
CH : RX high (Wide)
2) SSG output
: 12dB SINAD+2dB
Mod : 1kHz
Dev : ± 3.0kHz (Wide)
Dev : ± 1.5kHz (Narrow)
Transmitter Section
Item Condition
1. Frequency 1) CH : TX center
2) Transmit
2. Maximum 1) CH : TX high
power 2) Transmit
limitting
ADJUSTMENT
Measurement
Test equipment Terminal
Tra generator ANT
Spectrum analyzer BPF
Measurement
Test equipment Terminal
SSG ANT
Oscilloscope EXT. SP
AF V.M
Distortion meter
Measurement
Test equipment Terminal
Frequency counter ANT
Power meter
Adjustment
Parts Method
PC key Adjust the BPF waveform
to Fig. 1
Adjustment
Parts Method
Check
PC key Adjust to open the squelch
Adjustment
Parts Method
PC key Adjust to center frequency
VR1 28W
TK-7160
Specifications/
Remarks
Specifications/
Remarks
SINAD
: 12dB or higher
Specifications/
Remarks
Within ± 100Hz
± 1W
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