Kenwood TK-7180 Service Manual page 43

Receiver Section (K market model skips adjustment of Wide 4k)
Item Condition
1. Sensitivity 1) Adj item : [SENS1]
adjust Adjust : [✳✳✳]
2) Adj item : [L SENS1] →
[L' SENS1] → [C SENS1] → Oscilloscope
[H' SENS1] → [H SENS1]
Adjust : [✳✳✳]
2. Sensitivity [Panel test mode]
check 1) CH-Sig : 1-1
SSG output
Wide 5k : –116dBm (0.35µV)
(MOD : 1kHz/± 3kHz)
Narrow : –116dBm (0.35µV)
(MOD : 1kHz/± 1.5kHz)
3. Squelch 1) Adj item : [n SQL]
(Preset) Adjust : [✳✳✳]
adjust SSG output : 12dB SINAD level
• Narrow (MOD : 1kHz/± 1.5kHz)
2) Adj item : [nL SQL] →
[nC SQL] → [nH SQL]
Adjust : [✳✳✳]
• Wide 4k 3) Adj item : [s SQL]
Adjust : [✳✳✳]
SSG output : 12dB SINAD level
(MOD : 1kHz/± 2.4kHz)
4) Adj item : [sL SQL] →
[sC SQL] → [sH SQL]
Adjust : [✳✳✳]
• Wide 5k 5) Adj item : [w SQL]
Adjust : [✳✳✳]
SSG output : 12dB SINAD level
(MOD : 1kHz/± 3.0kHz)
6) Adj item : [wL SQL] →
[wC SQL] → [wH SQL]
Adjust : [✳✳✳]
ADJUSTMENT
Measurement
Test-
Unit Terminal Unit
equipment
SSG Rear ANT Front
panel panel
AF VTVM EXT. SP
TK-7180
Adjustment
Parts Method
[ ],[ ] Enter the following Note : After replacing the
adjustment values EEPROM (IC401) aline
to the transceiver sensitivity.
by pressing [ ] and
[ ] keys.
[L SENS1] : 60
[L' SENS1] : 88
[C SENS1] : 109
[H' SENS1] : 159
[H SENS1] : 192
After setting the
adjustment value,
press [B] key.
The adjustment
value will be stored
in memory.
Check 12dB SINAD or more
After input signal After adjusting SQL, check
from SSG, press [B] SQL open/close.
key. That numeric SSG 12dB SINAD level + 4dB
will be stored in
memory. SSG 12dB SINAD level – 6dB
[nC SQL] MOD 1kHz/± 1.5kHz
[sC SQL] MOD 1kHz/±2.4kHz
[wC SQL] MOD 1kHz/± 3.0kHz
Specifications/Remarks
: Open
: Close
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