Sony MHC-D7 - Page 15

FM Poler Adjustment (CIS model only)
Connection 1 :
FM RF SSG
FM ANTENNA terminal (75 Q)
Carrier frequency : 69MHz
Output level: 1mV (60dBV) (at 75Q OPEN)
Modulation ; AUDIO 1kHz, 10kHz Deviation
Connection 2 :
AF OSC
FM RF SSG
FM ANTENNA terminal (75 2)
Audio 31.25kHz external modulation terminal
Carrier frequency : 69MHZ
Output level :1 mV (60dBY) (at 75Q OPEN)
Modulation: AUDIO 31.25kHz, 10kHz Deviation
(EXTERNAL MODULATION)
Procedure :
1. Sef the modulation of FM RF SSG to AUDIO 1kHz, 10kHz
deviation according to “Connection 1”.
Tune the set to 69 MHz.
3. Adjust the RV1702 so that the reading of frequency counter
connected to TP1702 becomes within 31.25kHz + 0.0SkHz.
(VCO adjustment)
4. Then record the reading of the level meter connected to
TP1701.
5. Set. the modulation of FM RF SSG to AUDIO 31.25kHz,
10kHz deviation according to “Connection 2”.
6. Tune the set to 69 MHz.
Set the CT1701 to be mechanical center.
8. Adjust the L1701 so that the reading of the level meter
connected to TP1701 becomes maximum.
Then adjust the CT1701 so that the reading of the level meter
connected to TP1701 becomes maximum. (SUB CARRIER
PEAK Adjustment)
9. Adjust the RV1701 so that the level at the moment becomes
14dB higher value than the level recorded in step 4. (SUB
CARRIER LEVEL Adjustment)
N
n
Adjustment Location : POLER board (see page 14)