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5-4 TRIMMER ADJUSTMENTS
CODEC
FREQUENCY
SET
MODEM
FREQUENCY
SET
MODURATION
OUTPUT
LEVEL
ADJUSTMENT
ADJUSTMENT
MEASUREMENT MEASUREMENT
VALUE
POINT
UNIT LOCATION
UNIT ADJUST
1
1
1
2
3
MAIN
MAIN
MAIN
Connect the frequency counter to
the check point CP101.
Connect the frequency counter to
the check point CP216.
• Transmit the UT-115 to connect
J301, pin 1 to GND.
• Connect the oscilloscope to the
J301, pin 21.
Disconnect J301, pin 1 from GND.
16.38400 MHz ±10 Hz
2.457600 MHz ±3 Hz
350 mV
p-p ±10 mV
MAIN
MAIN
MAIN
C102
C207
R264
J301, Pin 21
Modulation output level
check point
J301, Pin 1
Transmit the UT-115
CP101
CODEC frequency set check point
CP216
MODEM frequency set check point
C207
MODEM frequency set adjustment
C102
CODEC frequency set adjustment
• UT-115 TOP VIEW
• UT-115 BOTTOM VIEW