Pll Adjustments - Icom IC-M401EURO Service Manual

5-2 PLL ADJUSTMENTS

ADJUSTMENT ADJUSTMENT CONDITION
LOCK 1 • Operating channel : ch16
VOLTAGE • Receiving
• Operating channel : ch16
2
• Output power
• Transmitting
• Operating channel : ch16
REFERENCE 1
• Output power
FREQUENCY
• Connect an RF power meter or a
50 Ω dummy load to the antenna
connector.
• Transmitting
MEASUREMENT
UNIT
MAIN Connect a digital
multi-meter or oscil-
loscope
check point CP1.
: Low
Rear Loosely couple the
: Low
Panel frequency counter
to the antenna con-
nector.
5 - 2
VALUE
LOCATION
1.8 V
to the
1.6 V
156.8000 MHz
ADJUSTMENT
POINT
UNIT ADJUST
Verify
MAIN C36
C36
Reference frequency
adjustment
CP1
PLL lock voltage
check point