Kenwood TKR-850 Service Manual page 42

TKR-850
Item Condition
18. RD outut 1) Connect SSG to RX ANT.
level CH : 2 (Wide)
(Wide) SSG output : –53dBm/501µV
SSG MOD : 1kHz
SSG DEV : 3.0kHz
(Narrow) 2) CH : 2 (Narrow)
SSG output : –53dBm/501µV
SSG MOD : 1kHz
SSG DEV : 1.5kHz
19. RA outut 1) Connect SSG to RX ANT.
level CH : 2 (Wide)
(Wide) SSG output : –53dBm/501µV
SSG MOD : 1kHz
SSG DEV : 3.0kHz
(Narrow) 2) CH : 2 (Narrow)
SSG output : –53dBm/501µV
SSG MOD : 1kHz
SSG DEV : 1.5kHz
20. Maximum 1) Connect AG to the MIC terminal. MOD ANA Rear
deviation Low CH (TX VCO low)
(Wide) Center CH (VCO center)
High CH (TX VCO high)
Deviation meter filter
HPF : OFF
LPF : 15kHz
De-emphasis : OFF
AG : 1kHz/50mV (Terminal load)
Transmission
(Narrow) 2) Low CH (TX VCO low)
Center CH (VCO center)
High CH (TX VCO high)
Transmission
Note : After adjustment of the "Max. Deviation", be sure to check the "DQT balance".
21. DQT 1) CH : 2
balance Deviation meter filter
(Wide) HPF : OFF
LPF : 3kHz
De-emphasis : OFF
Transmission
(Narrow) 2) CH : 2
Transmission
22. QT 1) CH : 2
deviation Deviation meter filter
(Wide) HPF : OFF
LPF : 3kHz
De-emphasis : OFF
Detector : p-p/2
Transmission
(Narrow) 2) CH : 2
Transmission
42
ADJUSTMENT
Measurement
Test-
Unit Terminal Unit
equipment
SSG Rear RX ANT
DVM CONTROL
I/O jack
RD (pin 10)
4.7kΩ load
SSG Rear RX ANT
DVM CONTROL
I/O jack
RA (pin 11)
4.7kΩ load
TX OUT
or
Deviation
meter
Oscilloscope
AG Front MIC
AF VTVM
MOD ANA Rear TX OUT
or
Deviation
meter
Oscilloscope
TX ANT
Adjustment
Parts Method
± 5mV
PC adj.
80mV
± 20mV
PC adj.
400mV
± 0.1kHz
PC adj.
4.1kHz
± 0.1kHz
PC adj.
2.05kHz
PC adj. Oscilloscope DC range
Make the de- flat "A" part
modulated waves
into square waves.
± 0.05kHz
PC adj.
0.75kHz
± 0.05kHz
PC adj.
0.35kHz
Specifications/Remarks
A
A