Receiver Adjustment - Icom IC-R100 Service Manual

7-4 RECEIVER ADJUSTMENT
ADJUSTMENT
2nd LO
(D/A)
ADJUSTMENT
MEASUREMENT POINT
| VALUE
UNIT LOCATION UNIT | ADJUST
MAIN | Connect the MAIN |R38, R153
frequency counter to
R51 and R52 (GND).
ADJUSTMENT CONDITIONS
Preset to center.
35.3000 MHz
Connect the RF Maximum level
voltmeter to R47 and | (More than 300 mVrms)
e Displayed frequency:
144.100 MHz (FRG version)
120.100 MHz (All other versions)
: FM
R38
L7, (8
R9 (GND).
е Displayed frequency:
144.105 MHz (FRG version)
120.105 MHz (All other versions)
* Mode : FM
* Remove RF voltmeter.
Connect the 35.2950 MHz R153
frequency counter to
R51 and R52 (GND).
35.3000 MHz R38
| |
e Displayed frequency:
144.100 MHz (FRG version)
120.100 MHz (All other versions)
* Mode :FM
Repeat steps 4 and 5 several times.
MAIN | Connect the digital
DC voltmeter to R88.
e Displayed frequency:
144.100 MHz (FRG version)
120.100 MHz (All other versions)
e Mode : WFM
e [PRE/ ATT] switch : OFF
e Set the signal generator;
Level : 3.2 uV* (一 97 dBm)
Modulation: 1 kHz
Deviation : 50 kHz
* This output level of the standard signal generator (SSG) is indicated as SSG's open circuit.