TK-880/H (UHF) mobile service manual - The Repeater Builder's ...

TK-880/H
ADJUSTMENT
Item
Condition
Measurement
Testequipment
Unit Terminal
Adjustment
Unit Parts Method
6. Modulation 1) Set test mode Power meter Rear ANT Make the de- (Wide/Narrow)
balanced MIC input : OFF Deviation panel modulation
Select “BAL” in tuning mode. meter
waveform neat.
“L BAL” Oscilloscope
Deviation meter filter
LPF : 15kHz AF VTVM Front MIC
HPF : OFF AG panel
De-emphasis : OFF
2) “C BAL”
PTT : ON
3) “H BAL”
PTT : ON
Specifications/Remarks
7. Maximum 1) Set test mode 3.8kHz (Wide) ± 50Hz (Wide/Narrow)
deviation Connect AG to the MIC 1.75kHz (Narrow)
terminal.
(According to the
Select “MAX” in tuning mode. larger +, –)
“L MAX”
AG : 1kHz/50mV
Deviation meter filter
LPF : 15kHz
HPF : OFF
De-emphasis : OFF
PTT : ON
2) “C MAX”
PTT : ON
3) “H MAX”
PTT : ON
8. MIC 1) Set test mode Check ± 3kHz± 0.2kHz (Wide)
seisitivity CH : CH1 - Sig1 ± 1.5kHz± 0.05kHz (Narrow)
check AG : 1kHz/5mV
PTT : ON
9. QT deviation 1) Set test mode 0.75kHz (Wide) ± 50Hz (Wide/Narrow)
Select “FQT” in tuning mode.
0.35kHz (Narrow)
“L FQT”
Deviation meter filter
LPF : 3kHz
HPF : OFF
PTT : ON
2) “C FQT”
PTT : ON
3) “H FQT”
PTT : ON
10. DQT 1) Set test mode 0.75kHz (Wide) ± 50Hz (Wide/Narrow)
deviation Select “F DQT” in tuning mode. 0.35kHz (Narrow)
“L FDQT”
Deviation meter filter
LPF : 3kHz
HPF : OFF
PTT : ON
2) “C FDQT”
PTT : ON
3) “H FDQT”
PTT : ON
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