Frequency Adjustment - Icom IC-M422 Service Manual

5-2 FREQUENCY ADJUSTMENT

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