Kenwood TK-378G, Service Manual

Page: 20 / 31

TK-378G
20
ADJUSTMENT
Fig. 1 BPF-WAVE Fig. 2
Item Condition
Measurement Adjustment
Specifications/
Test equipment Terminal Parts Method
Remark
M4 type
1. Sensitivity f
L
: Low DVM PC key f
L
: [55]
Adjustment f
c
: Center f
C
: [100]
(PC MODE) f
H
: High f
H
: [160]
2. BPF TEST CH : Low Tracking generator ANT TC301, TC302, TC303 Adjust wave form to figure 1.(f
L
)
Tra-G setting -40dBm spectrum analyzer BPF
TEST CH : Center Check wave form to figure 2.(f
C
)
TEST CH : High Check wave form to figure 2.(f
H
)
3. Sensitivity 1) TEST CH : Center SSG ANT Check 12dB SINAD or
Check SSG OUT AF VTVM more
Wide:-118dBm (0.28µV) Oscilloscope
(MOD:1kHz / ±3kHz)
Narrow:-117dBm (0.316µV)
(MOD:1kHz / ±1.5kHz)
4. Squelch (Open) 1) TEST CH : Center PC key Adjust to the
Adjust SSG OUT: squelch
(PC MODE)
[Wide] -123dBm (0.158µV) threshold point
2) TEST CH : Center
[Narrow] SSG OUT:
-122dBm (0.178µV)
5. Squelch(Tight) 1) TEST CH : Center Adjust to the
Adjust SSG OUT:-116dBm (0.35µV) squelch
(PC MODE)
[Wide] threshold point
[Narrow] 2) TEST CH : Center
SSG OUT:-115dBm (0.398µV)
6. Squelch 1) TEST CH : Center Check Squelch must
Check SQ Level : [SQL5] be opened.
(PC MODE) SSG OUT:
-118dBm (0.28µV)
2) SSG OUT:OFF Squelch must
be closed.