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5-2 TRIMMER ADJUSTMENT
The following adjustment must be performed on the normal mode.
ADJUSTMENT
ADJUSTMENT CONDITION
PLL LOCK
1
• Displayed frequency
VOLTAGE
• Mode
• Receiving
2
• Displayed frequency
• Mode
• Receiving
3
• Displayed frequency
• Mode
• Receiving
4
• Displayed frequency
• Mode
• Receiving
5
• Displayed frequency
• Mode
• Receiving
6
• Displayed frequency
• Mode
• Receiving
POWER
1
• Displayed frequency
BALANCE
• Transmitting
2
• Displayed frequency
• Transmitting
3
• Displayed frequency
• Transmitting
4
• Displayed frequency
• Transmitting
5
• Same adjustments as steps 1–4 several times.
MEASUREMENT
UNIT
VCO
: 30.000 MHz
: FM
: 29.995 MHz
: FM
: 150.000 MHz
: WFM
: 169.995 MHz
: WFM
: 550.000 MHz
: WFM
: 629.990 MHz
: FM
Top
: 144.000 MHz
panel
: 148.000 MHz
: 440.000 MHz
: 460.000 MHz
5 - 3
LOCATION
Connect
the
DC
voltmeter
or
an
oscilloscope to the
checkpoint "CP".
7.0 V–11.0 V
7.0 V–11.0 V
7.0 V–11.0 V
Connect
an
RF
144.000 MHz's power
power meter to the
antenna connector.
Same value as
144.000 MHz's power
440.000 MHz's power
Same value as
440.000 MHz"s
ADJUSTMENT
POINT
VALUE
UNIT
0.4 V–1.0 V
0.7 V–2.0 V
0.6 V–1.2 V
RF
power
ADJUST
Verify
Verify
verify
Verify
Verify
Verify
L19
L19
L16,
L456
L16,
L456
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