Icom IC-M422 - Receive Adjustment Procedures

5 - 4
ADJUSTMENT ADJUSTMENT CONDITION
MEASUREMENT
VALUE
ADJUSTMENT
POINT
UNIT OPERATION UNIT ADJUST
SENSITIVITY 1 • Channel : CH16 (156.800 MHz)
• [SQL] : Max. counterclockwise
• Connect a distortion meter with a 4
Ω
load to the external speaker lead.
• Push [PA•RX ] for 1 sec. to turn the
RX speaker mode ON.
• Connect an SSG to the antenna
connector and set as ;
Frequency : 156.800 MHz
Level : +10 dB
µ
Modulation :1 kHz
Deviation : ±3 kHz
• Receiving
MAIN Connect a DC volt meter
or oscilloscope to the
check point "CP3".
Maximum
voltage
MAIN L35
,
L36, L38,
L39
(Repeate two
times or more.)
SQUELCH 1 • Channel : CH16 (156.800 MHz)
• [SQL] : Max. counterclockwise
• Set the SSG as;
Level : −12 dB
µ
• Receiving
MAIN Connect a volt meter
or
oscilloscopeto the
check point "CP5".
1.0 V MAIN R214
5-4 RECEIVE ADJUSTMENT
L36
L35
L38
CP3
Sensitivity check point
R214
Squelch adjustment
CP5
Squelch check point
Sensitivity
adjustment
L39