Kenwood TK-880 series, Руководство по обслуживанию

Страница: 52 / 75

ADJUSTMENT
Measurement
Test-
equipment
Unit Terminal
Adjustment
Unit Parts Method
Specifications/Remarks Condition Item
52
TK-880
5. Squelch 1) Set test mode SSG Rear ANT
(Tight) Select “nL SQLT” in tuning mode. panel
Set “nL SQLT 255” AF VTVM ACC
Distortion (EXT.SP)
2) “nC SQLT” meter
Set “nC SQLT 255” Oscilloscope
AG
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 Writing values only.
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 Squelch must be opened.
check CH : CH1 - Sig1 (Wide 5k/Wide 4k/Narrow)
SSG freq’ : See freq’ table
SSG output : 15dB SINAD level
2) SSG output : OFF Squelch must be closed.
(Wide 5k/Wide 4k/Narrow)
8. QT check 1) Set test mode Check Squelch must be opened.
CH : CH1 - Sig5 (Wide 5k/Wide 4k/Narrow)
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 Squelch must be closed.
CH1 - Sig6
CH1 - Sig7