TKR-750
42
Item
Condition
Measurement
Adjustment
Specifications/Remarks
Test-
equipment
Unit
Terminal
Parts
Unit
Method
ADJUSTMENT
21. RA outut
1) Connect SSG to RX ANT.
SSG
Rear
RX ANT
PC adj.
±
20mV
level
CH : 2 (Wide)
400mV
(Wide)
SSG output : –53dBm/501
µ
V
DVM
CONTROL
SSG MOD : 1kHz
I/O jack
SSG DEV : 3.0kHz
RA (pin 11)
4.7k
Ω
load
(Narrow)
2) CH : 2 (Narrow)
SSG output : –53dBm/501
µ
V
SSG MOD : 1kHz
SSG DEV : 1.5kHz
22. Maximum
1) Connect AG to the MIC terminal. MOD ANA Rear
TX OUT
PC adj.
±
0.1kHz
deviation
A-low CH (TX VCO A low)
or
4.1kHz
(Wide)
A-center CH (VCO A center)
Deviation
A-high CH (TX VCO A high)
meter
B-low CH (TX VCO B low)
Oscilloscope
B-center CH (VCO B center)
B-high CH (TX VCO B high)
AG
Front
MIC
Deviation meter filter
AF VTVM
HPF : OFF
LPF : 15kHz
De-emphasis : OFF
AG : 1kHz/50mV (Terminal load)
Transmission
(Narrow)
2) A-low CH (TX VCO A low)
PC adj.
±
0.1kHz
A-center CH (VCO A center)
2.05kHz
A-high CH (TX VCO A high)
B-low CH (TX VCO B low)
B-center CH (VCO B center)
B-high CH (TX VCO B high)
Transmission
Note :
After adjustment of the “Max. Deviation”, be sure to check the “DQT balance”.
23. DQT
1) Low CH (VCO-A center)
MOD ANA Rear
TX OUT
PC adj.
Oscilloscope DC range
balance
High CH (VCO-B center)
or
Make the de-
flat “A” part
(Wide)
Deviation meter filter
Deviation
modulated waves
HPF : OFF
meter
into square waves.
LPF : 3kHz
Oscilloscope
De-emphasis : OFF
Transmission
(Narrow)
2) Low CH (VCO-A center)
High CH (VCO-B center)
Transmission
24. QT
1) VCO-A CH (TX VCO A center)
TX ANT
PC adj.
±
0.05kHz
deviation
VCO-B CH (TX VCO B center)
0.75kHz
(Wide)
Deviation meter filter
HPF : OFF
LPF : 3kHz
De-emphasis : OFF
Detector : p-p/2
Transmission
(Narrow)
2) VCO-A CH (TX VCO A center)
PC adj.
±
0.05kHz
VCO-B CH (TX VCO B center)
0.35kHz
Transmission
A
A
