Transmitter Adjustment For Ic-F3/S - Icom IC-F3 Service Manual

5-4 TRANSMITTER ADJUSTMENT for IC-F3/S

The following adjustment must be performed after "REFERENCE FREQUENCY ADJUSTMENT" in section 5-3.
ADJUSTMENT ADJUSTMENT CONDITIONS
DTCS WAVE 1 • Operating freq. :
FORM 143.000 MHz (L-band)
160.000 MHz (H-band)
• High/Low switch: Low
• No audio applied to the [MIC] jack.
• DTCS code
• Transmitting
• MAIN unit
FM deviation
meter
Oscilloscope
: 007
Attenuator
R150
DTCS wave
form adjustment
MEASUREMENT
UNIT LOCATION
Top Connect an FM devia-
panel tion meter with an
oscilloscope to the
antenna connector
through an attenuator.
see detailed illustration
below
VR board
5 - 5
ADJUSTMENT
VALUE
UNIT ADJUST
Set to flat wave
MAIN R150
form
,
DC power supply
.
Power supply connection
connect (soldering)
, line here