Kenwood TK-880 Service Manual page 51

TK-880
Item Condition
5. Squelch 1) Set test mode
(Tight) Select "nL SQLT" in tuning mode.
Set "nL SQLT 255"
2) "nC SQLT"
Set "nC SQLT 255"
3) "nH SQLT"
Set "nH SQLT 255"
4) Only E type
"sL SQLT", "sC SQLT", "sH SQLT"
Same as narrow adjustment (255).
5) "wL SQLT", "wC SQLT", "wH SQLT"
Same as narrow adjustment (255).
6. RSSI (High) 1) Set test mode
Select "nL HRSI" in tuning mode.
SSG freq' : See freq' table
SSG output : –70dBm
SSG MOD : 1.5kHz (Narrow)
2) "nC HRSI"
SSG freq' : See freq' table
3) "nH HRSI"
SSG freq' : See freq' table
4) "sL HRSI", "sC HRSI", "sH HRSI"
SSG freq' : –70dBm
SSG output : Sensitivity
value of 12dB SINAD.
SSG MOD : 2.4kHz (Wide 4k)
5) "wL HRSI", "wC HRSI", "wH HRSI"
SSG freq' : –70dBm
SSG output : Sensitivity
value of 12dB SINAD.
SSG MOD : 3.0kHz (Wide 5k)
7. Squelch 1) Set test mode
check CH : CH1 - Sig1
SSG freq' : See freq' table
SSG output : 15dB SINAD level
2) SSG output : OFF
8. QT check 1) Set test mode
CH : CH1 - Sig5
SSG freq' : See freq' table
SSG MOD
INT : 1kHz
EXT : 151.4Hz
SSG system MOD DEV
: ±3.75kHz
SSG output : 12dB SINAD level
2) CH : CH1 - Sig4
CH1 - Sig6
CH1 - Sig7
50
ADJUSTMENT
Measurement
Test-
Unit Terminal Unit
equipment
SSG Rear ANT
panel
AF VTVM ACC
Distortion (EXT.SP)
meter
Oscilloscope
AG
Adjustment
Parts Method
Writing values only.
Check Squelch must be opened.
(Wide 5k/Wide 4k/Narrow)
Squelch must be closed.
(Wide 5k/Wide 4k/Narrow)
Check Squelch must be opened.
(Wide 5k/Wide 4k/Narrow)
Squelch must be closed.
Specifications/Remarks