4-4 RECEIVER ADJUSTMENT
SENSITIVITY
• Operating channel : ch16
• [SQUELCH] control:
Max. counterclockwise
• Connect an SSG to the antenna
connector and set as:
Frequency : 156.800 MHz
Level : 10 µV*
(–97 dBm)
Modulation : 1 kHz
Deviation : ±3.5 kHz
• Receiving
4-3 TRANSMITTER ADJUSTMENTS
4-2 PLL ADJUSTMENTS
4 - 2
LOCK
VOLTAGE
REFERENCE
FREQUENCY
ADJUSTMENT
ADJUSTMENT ADJUSTMENT CONDITION
MEASUREMENT
VALUE
POINT
UNIT LOCATION UNIT ADJUST
1
2
1
• Operating channel : ch16
• Receiving
• Operating channel : ch16
• Output power : Low
• Transmitting
• Operating channel : ch16
• Output power : Low
• Connect an RF power meter or a
50 Ω dummy load to the antenna
connector.
• Transmitting
MAIN
Rear
Panel
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.
Loosely couple the
frequency counter
to the antenna con-
nector.
2.6 V
2.8 V
156.8000 MHz
MAIN
MAIN
L13
L12
C117
OUTPUT
POWER
FREQUENCY
DEVIATION
ADJUSTMENT
ADJUSTMENT ADJUSTMENT CONDITION
MEASUREMENT
VALUE
POINT
UNIT LOCATION UNIT ADJUST
1
2
1
• Operating channel : ch16
• Output power : Low
• Transmitting
• Output power : High
• Transmitting
• Operating channel : ch16
• Output power : Low
• Connect an audio generator to J2
(pin 5) with an AC millivoltmeter
and set as:
Frequency : 1 kHz
Level :
230 mV [M45EURO]
550 mV [M45]
• Set an FM deviation meter as:
HPF : OFF
LPF : 20 kHz
De-emphasis : OFF
Detector : (P–P)/2
• Transmitting
Rear
Panel
Rear
Panel
Connect an RF
power meter to the
antenna connector.
Connect an FM
deviation meter to
the antenna con-
nector through an
attenuator.
0.7 W [M45EURO]
0.9 W [M45]
24 W[M45EURO]
25 W [M45]
±4.3 kHz
MAIN
MAIN
R70
R71
R130
ADJUSTMENT
ADJUSTMENT ADJUSTMENT CONDITION
MEASUREMENT
VALUE
POINT
UNIT LOCATION UNIT ADJUST
1 MAIN Connect a DC volt-
meter to the check
point CP3.
Maximum voltage MAIN L5,
L6,
L7,
*This output level of a standard signal generator (SSG) is indicated as SSG’s open circuit.
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