Icom IC-M422 - Frequency Adjustment Procedures

ADJUSTMENT
ADJUSTMENT
CONDITION
MEASUREMENT
VALUE
ADJUSTMENT
POINT
UNIT OPERATION UNIT ADJUST
LOCK
VOLTAGE
1 • Channel : CH16 (156.800 MHz)
• Receiving
MAIN Connect a digital multi-
meter or oscilloscope
to the check point "CP1".
1.1–2.1 V MAIN Verify
2 • Channel : CH16 (156.800 MHz)
• Output power : Low
• Transmitting
0.9–1.9 V Verify
REFERENCE
FREQUENCY
1 • Channel : CH16 (156.800 MHz)
• Output power : Low
• Connect a power meter to the antenna
connector.
• Transmitting
Rear
Panel
Loosely couple a fre-
quency counter to the
antenna connector.
156.800 MHz
±500 Hz
MAIN C12
CP1
Lock voltage
check point
Reference frequency
adjustment
C12
5-2 FREQUENCY ADJUSTMENT
5 - 2