– 20 –
FM Polar VCO Adjustment
Setting:
SOURCE button: FM
FM Polar Pilot Adjustment
Setting:
SOURCE button: FM
set
FM RF signal
generator
antenna jack
Carrier frequency : 69.5 MHz (FM2: 3CH)
Output level
: 60 dB (1 mV)
TP401 (VCO)
main board
frequency counter
+
–
Procedure:
1. Connect the frequency counter to the TP401 (VCO) on main
board.
2. Adjust RV402 so that the reading on the frequency counter
becomes to 31.25 ± 0.1 kHz.
Adjustment Location: See page 21.
set
FM RF signal
generator
antenna jack
Carrier frequency : 69.5 MHz (FM2: 3CH)
Output level
: 60 dB (1 mV)
Procedure:
1. Connect the level meter to the TP402 (PLT) on main board.
2. Set the modulation frequency of the FM RF signal generator
to 1 kHz (10 kHz div.)
3. Then output level is supposing that 0 dB.
4. Set the modulation frequency of the FM RF signal generator
to 31.25 kHz (10 kHz div.).
5. Adjust L401 so tha the reading on the level meter becomes to
maximum.
6. Adjust RV401 so that the reading on the level meter becomes
to 13.0 ± 0.5 dB.
Adjustment Location: See page 21.
TP402 (PLT)
main board
level meter
+
–
