Kenwood FM Transceiver TK-481 Service Manual page 38

Item Condition
9. DQT BAL 1) SYS – GRP : 4 –
adjustment Select BAL
in tuning mode.
Deviation meter filter setting
LPF : 3kHz
HPF : OFF
PTT : ON
10. MAX DEV 1) SYS – GRP : 4 –
adjustment Select MAX
in tuning mode.
AG : 1kHz/150mV
Deviation meter filter setting
LPF : 15kHz
HPF : OFF
Adjustment item
L MAX
H MAX
PTT : ON
11. T/A MAX 1) SYS – GRP : 4 –
DEV Select TMAX
adjustment in tuning mode.
AG : 1kHz/150mV
Deviation meter filter setting
LPF : 15kHz
HPF : OFF
Adjustment item
L TMAX
H TMAX
PTT : ON
12. NPSPAC 1) SYS – GRP : 10 –
MAX DEV Select NMAX
adjustment in tuning mode.
AG : 1kHz/150mV
Deviation meter filter setting
LPF : 15kHz
HPF : OFF
Adjustment item
L NMAX
H NMAX
PTT : ON
13. MIC 1) SYS – GRP : 4 – 1
sensitivity AG : 1kHz/15mV (TK-480)
check AG : 1kHz/8mV (TK-481)
Deviation meter filter setting
LPF : 15kHz
HPF : OFF
PTT : ON
14. T/A MIC 1) SYS – GRP : 4 – 1
sensitivity TA mode : ON
check (Press [A] key, then [C] key)
AG : 1kHz/15mV (TK-480)
AG : 1kHz/8mV (TK-481)
Deviation meter filter setting
LPF : 15kHz
HPF : OFF
PTT : ON
ADJUSTMENT
Measurement
Test-
Unit
equipment
Power meter Panel
Deviation
meter
Oscilloscope
AG
AF VTVM
C MAX
C TMAX
C NMAX
Adjustment
Terminal Unit Parts
ANT Panel Encoder Make the demodu-
knob lation waves into
square waves.
Universal TK-480 : 3.8kHz
TK-481 : 1.75kHz
(According to the
larger +, –.)
TK-480 : 2.9kHz
(According to the
larger +, –.)
Check
TK-480/481
Specifications/Remarks
Method
50Hz
50Hz
TK-480 : 2.2~3.6kHz
TK-481 : 0.6~1.0kHz
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