Kenwood TKR-740 Service Manual page 75

TKR-740
TX UNIT
Item
21.DQT 1) CH2 (VCO-A Center)
Balance 2) CH5 (VCO-B Center)
Adjust AG.f : 50Hz (square w ave)
(Wide) LEVEL : Insert 0.5Vp-p into the CONTROL I/O
LPF : 3kHz
HPF : OFF
Transmission
(Narrow ) 1) CH8 (VCO-A Center)
2) CH11 (VCO-B Center)
AG.f : 50Hz (square w ave)
LEVEL : Insert 0.5Vp-p into the CONTROL I/O
LPF : 3kHz
HPF : OFF
Transmission
22.TD Dev 1) CH2 (VCO-A Center)
Adjust 2) CH5 (VCO-B Center)
(Wide) AG.f : 100Hz (Sine w ave)
LEVEL : Insert 0.5Vp-p into the CONTROL I/O
LPF : 3kHz
HPF : OFF
Transmission
(Narrow ) 1) CH8 (VCO-A Center)
2) CH11 (VCO-B Center)
AG.f : 100Hz (Sine w ave)
LEVEL : Insert 0.5Vp-p into the CONTROL I/O
LPF : 3kHz
HPF : OFF
Transmission
23.TA Dev 1) CH4 (Center Frequency)
Adjust AG.f : 1kHz (Sine w ave)
(Wide) LEVEL : Insert 280mV into the CONTROL I/O
LPF : 15kHz
HPF : OFF
Transmission
(Narrow ) 1) CH10 (Center Frequency)
AG.f : 1kHz (Sine w ave)
LEVEL : Insert 280mV into the CONTROL I/O
LPF : 15kHz
HPF : OFF
Transmission
76
ADJUSTMENT
Condition
TD terminal (pin 8)
TD terminal (pin 8)
TD terminal (pin 8)
TD terminal (pin 8)
TA terminal (pin 9)
TA terminal (pin 9)
M easurement
Test
Unit Terminal Unit Parts
equipment
M OD ANA TX TX OUT
Oscilloscope A/3 CONTROL I/O
TD Terminal
(pin 8)
TX OUT
CONTROL I/O
TA Terminal
(pin 9)
Adjustment
Specifications/
M ethod Remarks
PC ADJ
Make the demodulated
w aves into square
w aves.
Oscilloscope
DC range
PC ADJ
0.75kHz ± 0.05kHz
PC ADJ
2.4kHz ± 0.1kHz
PC ADJ
1.5kHz ± 0.05kHz