Kenwood TK-3140 Service Manual page 19

Receiver Section
Item Condition
1. Sensitivity 1) Adj item [SENS]
Adjust Adjust [ ]
(BPF
characteristic) 2) Low-edge frequency
Adj item
[L SENS] [L2 SENS]
[C SENS] [H2 SENS]
[H SENS]
Spe-Ana setting
Center·f : 450MHz(K)
Span : 100MHz
RBW : 100kHz
VBW : 1kHz
REF level : -50dBm
ATT : 0dB
Tra-G setting
Input level:-30dBm
2. Sensitivity [Panel Test Mode]
Check 1) CH-Sig:1-1
SSG OUT
Wide:-117dBm
(MOD:1kHz / ±3kHz)
Narrow:-116dBm
(MOD:1kHz / ±1.5kHz)
3. Squelch 1) Adj item [O SQL]
Adjust Adjust [ ]
(Open) 2) Adj item
[L OSQL]
Adjust [ ]
SSG OUT:
12dB SINAD level
3) Adj item [n OSQL]
Adjust [ ]
SSG OUT:
12dB SINAD level
4. Squelch [Panel Test Mode]
Check 1) CH-Sig:1-1
(Open) SSG OUT:
12dB SINAD level
2) SSG OUT:OFF
ADJUSTMENT
Measurement
Test equipment
Tracking Panel
generator
Specturm TX-RX
analyzer
SSG Panel
AF VTVM
Oscilloscope
[C OSQL] [H OSQL]
Unit Terminal Unit
ANT Panel
BPF
Need couple
capacitor
(1000PF)
ANT
Universal
connector
TK-3140
Adjustment
Specifications/
Remark
Parts Method
Adjustment
Encoder
Turn a knob and make "fo"
knob
level 1dB above from peak
level.
Caution
Adjustment "SENS" value 60
1dB
fo
fo=f L, f L2, f C, f H2, f H
Adjust point frequency
Refer to the Panel Tuning
Mode frequency table on
page 14.
Check 12dB SINAD or
more
Encoder Adjust to point
knob of opening
squelch.
Check Squelch must
be opened.
Squelch must
be closed.
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