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5-3 PA AND FILTER UNITS ADJUSTMENT
ADJUSTMENT
ADJUSTMENT CONDITIONS
IDLING
1
• Operating frequency : 12.2350 MHz
CURRENT
• Mode
( For drive
• Apply no audio signal to the [MIC]
FETs)
connector.
• Disconnect J6702.
• Preset R6304 and R6412 on the PA
unit to max. counter clockwise.
• Preset R6515 on the PA unit to max.
clockwise.
• Connect a dummy load or RF power
meter to the [ANT] connector.
• Transmitting
( For final
2
• Transmitting
transistors)
• After adjustment, connect J6701 to the PA unit.
SWR
• Operating frequency : 22.0000 MHz
1
DETECTOR
• Mode
• Connect the CP7332 (FOR line) on
the FILTER unit to ground.
2
• Connect an audio generator to the
[MIC] connector and set as:
Frequency
Level
• Transmitting
• After adjustment, disconnect CP7332 (FOR line) on the FILTER unit from ground.
MEASUREMENT
UNIT
Rear
Connect an ammeter
: J3E
panel
(10 A) between an
external power supply
and the transceiver.
Rear
Connect an RF power
: J3E
panel
meter to the [ANT]
connector.
FILTER
C o n n e c t
voltmeter to the check
: 1.5 kHz
point, CP7331.
: OFF
5 - 5
VALUE
LOCATION
2.0 A
0.7 A
90 W
a
D C
Minimum level
ADJUSTMENT
UNIT ADJUST
R6304
PA
R6412
Output
AG
level
FILTER
C7275
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