FM Polar Adjustment (East European, CIS model only)Procedure :
1. Set the modulation of FM RF SSG to AUDIO 1 kHz, 10 kHz
Connection 1 :deviation according to OConnection 1�.
2. Tune the set to 69 MHz.
FM RF SSG3. Adjust the RV1702 so that the reading of frequency counter con-
75 W coaxial
nected to TP1702 (VCO) becomes within 31.25 kHz ? 0.05 kHz.
(VCO adjustment)
set
4. Then record the reading of the level meter connected to TP1701.
5. Set the modulation of FM RF SSG to AUDIO 31.25 kHz, 10
FM antenna kHz deviation according to OConnection 2�.
terminal (75 W)
6. Tune the set to 69 MHz.
Carrier frequency: 69 MHz
7. Set the CT1701 to be mechanical center.
Output level:1 mV (60 dBm) (at 75 W open)
Modulation:AUDIO 1 kHz, 10 kHz deviation8. Adjust the L1701 so that the reading of the level meter con-
nected to TP1701 (FILTER) becomes maximum.
Connection 2 :Then adjust the CT1701 so that the reading of the level meter
connected to TP1701 (FILTER) becomes maximum. (SUB CAR-
AF OSCRIER PEAK Adjustment)
FM RF SSG
75 W coaxial9. Adjust the RV1701 so that the level at the moment becomes 14
dB higher value than the level recorded in step 4. (SUB CAR-
RIER LEVEL Adjustment)
set
Audio 31.25 kHz
FM antenna external
modulationterminal (75 W)
terminal
Carrier frequency: 69 MHz
Output level:1 mV (60 dBm) (at 75 W open)
Modulation:AUDIO 31.25 kHz, 10 kHz deviation
(EXTERNAL MODULATION)
Adjustment Location: TCB board
Adjustment Location:
[TCB BOARD] (Conductor Side)[TCB BOARD] (Component Side)
L1701
Sub Carrier Peak
CT1701
frequency counter
RV1701
Sub Carrier
TP1701
Level
(FILTER)
level meter
IC1701IC1701
TP1702
(VCO)RV1702
VCO
� 18 � |
ACEC
