Pll Adjustments; Transmitter Adjustments; Receiver Adjustment - Icom IC-M45 Service Manual

4-2 PLL ADJUSTMENTS

ADJUSTMENT ADJUSTMENT CONDITION
LOCK 1 • Operating channel : ch16
• Receiving
VOLTAGE
2 • Operating channel : ch16
• Output power
• Transmitting
1 • Operating channel : ch16
REFERENCE
FREQUENCY • Output power
• Connect an RF power meter or a
50 Ω dummy load to the antenna
connector.
• Transmitting

4-3 TRANSMITTER ADJUSTMENTS

ADJUSTMENT ADJUSTMENT CONDITION
OUTPUT 1 • Operating channel : ch16
• Output power
POWER
• Transmitting
2 • Output power
• Transmitting
FREQUENCY 1 • Operating channel : ch16
DEVIATION • Output power
• Connect an audio generator to J2
(pin 5) with an AC millivoltmeter
and set as:
Frequency
Level
• Set an FM deviation meter as:
HPF
LPF
De-emphasis
Detector
• Transmitting

4-4 RECEIVER ADJUSTMENT

ADJUSTMENT ADJUSTMENT CONDITION
SENSITIVITY 1 • Operating channel : ch16
• [SQUELCH] control:
• Connect an SSG to the antenna
connector and set as:
Frequency
Level
Modulation
Deviation
• Receiving
*This output level of a standard signal generator (SSG) is indicated as SSG's open circuit.
: Low
: Low
: Low
: High
: Low
: 1 kHz
:
230 mV [M45EURO]
550 mV [M45]
: OFF
: 20 kHz
: OFF
: (P–P)/2
Max. counterclockwise
: 156.800 MHz
: 10 µV*
(–97 dBm)
: 1 kHz
: ±3.5 kHz
MEASUREMENT
UNIT LOCATION
MAIN Connect a digital
multi-meter or oscil-
loscope to the
check point CP1.
Connect a digital
multi-meter or oscil-
loscope to the
check point CP2.
Rear Loosely couple the
Panel frequency counter
to the antenna con-
nector.
MEASUREMENT
UNIT LOCATION
Rear Connect an RF
Panel power meter to the
antenna connector.
Rear Connect an FM
Panel deviation meter to
the antenna con-
nector through an
attenuator.
MEASUREMENT
UNIT LOCATION
MAIN Connect a DC volt-
meter to the check
point CP3.
4 - 2
ADJUSTMENT
VALUE
UNIT
2.6 V MAIN
2.8 V
156.8000 MHz MAIN
ADJUSTMENT
VALUE
UNIT
0.7 W [M45EURO] MAIN
0.9 W [M45]
24 W[M45EURO]
25 W [M45]
±4.3 kHz MAIN
ADJUSTMENT
VALUE
UNIT
Maximum voltage MAIN
POINT
ADJUST
L13
L12
C117
POINT
ADJUST
R70
R71
R130
POINT
ADJUST
L5,
L6,
L7,