5 - 2
5-2 PLL AND TRANSMITTER ADJUSTMENTS
PLL LOCK
VOLTAGE
PLL
REFERENCE
FREQUENCY
UHF
OUTPUT
POWER
VHF
OUTPUT
POWER
FREQUENCY
DEVIATION
ADJUSTMENT
ADJUSTMENT
ADJUSTMENT CONDITION
MEASUREMENT
VALUE
POINT
UNIT
LOCATION
UNIT
ADJUST
1
1
1
2
3
4
1
2
3
4
1
2
3
• VHF displayed freq. :
145.000 MHz
• Receiving
• UHF displayed freq. :
450.000 MHz
[USA]
440.000 MHz
other
• Output power : Low
• Transmitting
• UHF displayed freq. :
445.000 MHz
[USA]
435.000 MHz
other
• Output power : High
• Transmitting
• Output power : Low
• Transmitting
• Output power : Mid-L
• Transmitting
• Output power : Mid-H
• Transmitting
• VHF displayed freq. :
145.000 MHz
[EUR]
146.000 MHz
other
• Output power : High
• Transmitting
• Output power : Low
• Transmitting
• Output power : Mid-L
• Transmitting
• Output power : Mid-H
• Transmitting
• UHF displayed freq. :
445.000 MHz
[USA]
435.000 MHz
other
• Output power : Low
• Connect an audio generator to
the [MIC] connector and set as:
1 kHz/ 80 mV
[USA]
1 kHz/ 20 mV
other
• TONE : OFF
• Set an FM deviation meter as:
HPF : 50 Hz
LPF : 20 kHz
De-emphasis : OFF
Detector
: (P–P)/2
• Transmitting
• VHF displayed freq. :
145.000 MHz
[EUR]
146.000 MHz
other
• Output power : Low
• Transmitting
• IF bandwidth
: Narrow
[EUR, ITA] only
• Transmitting
MAIN
Rear
panel
Rear
panel
Rear
panel
Rear
panel
Connect a digital
multi-meter or oscil-
loscope to the
check point CP-LV.
Loosely couple the
frequency counter
to the antenna con-
nector.
Connect an RF
power meter to the
antenna connector.
Connect an RF
power meter to the
antenna connector.
Connect an FM
deviation meter to
the antenna con-
nector through an
attenuator.
1.65 V
450.0000 MHz [USA]
440.0000 MHz other
35 W
2–7 W
8–15 W
16–24 W
50 W
2–7 W
8–15 W
16–24 W
±4.8 kHz
±4.8 kHz
±2.0–±2.8 kHz
MAIN
MAIN
MAIN
MAIN
MAIN
L2
C84
R121
Verify
R119
Verify
R78
R2
Verify
