Kenwood TK-7162 E - Reference Level Adjustment; PCB Alignment Procedures

TK-7160/7162
30
ADJUSTMENT
PCB Section
1. Setting 1) Power supply voltage
DC Power supply terminal : 13.6V
2. VCO lock 1) CH : TX high Digital voltmeter CV TC442 5.5V ± 0.1V
voltage
2) CH : RX high TC441 5.5V ± 0.1V
3) CH : TX low Check 0.7V or more
4) CH : RX low
3. IF coil 1) CH : RX center (Wide) SSG AFV L321 3.25~3.35V (DC)
2) SSG output : –53dBm (501µV) Digital voltmeter
Mod : 1kHz, Dev : 3kHz
4. RF 1) CH : RX center (Wide) Tra generator ANT PC key Adjust the BPF waveform
bandpass CH : RX low (Wide) Spectrum analyzer BPF to Fig. 1
filter CH : RX high (Wide)
2) Tra generator output : –30dBm
Connect the spectrum analyzer
to BPF terminal
Item Condition
Test equipment Terminal Parts Method
Specifications/
Remarks
Measurement
Adjustment
3 or 5 Reference Level Adjustment Frequency
Tuning point RX (MHz) TX (MHz)
Low 136.05 136.10
Low’ 145.55 145.60
Center 155.05 155.10
High’ 164.55 164.60
High 173.95 173.90
Fig. 1
Ref –20 dBm
Peak
Log
10
dB/
Atten 0 dB
W1 S2
S3 FC
AA
Center 160.1 MHz
#Res BW 30 kHz
Span 100 MHz
Sweep 277.8 ms (401 pts)
VBW 30 kHz
136.1MHz
–40.5dBm
155.1MHz
–40.58dBm
174.0MHz
–42.81dBm
Receiver Section
Item Condition
Test equipment Terminal Parts Method
Specifications/
Remarks
Measurement
Adjustment
1. Seisitivity 1) CH : RX low SSG ANT Check SINAD
(Wide/Wide 4k/Narrow) Oscilloscope EXT. SP : 12dB or higher
CH : RX center AF V.M
(Wide/Wide 4k/Narrow) Distortion meter
CH : RX high
(Wide/Wide 4k/Narrow)
2) SSG output
: –118dBm (0.28µV)
(Wide/Wide 4k)
: –116dBm (0.35µV) (Narrow)
Mod : 1kHz
Dev : ±3.0kHz (Wide)
Dev : ±2.4kHz (Wide 4k)
Dev : ±1.5kHz (Narrow)