Icom IC-F3

The following adjustment must be performed after “REFERENCE FREQUENCY ADJUSTMENT” in section 5-3.
5 - 5
Set to flat wave
form
5-4 TRANSMITTER ADJUSTMENT for IC-F3/S
DTCS WAVE
FORM
1 • Operating freq. :
143.000 MHz (L-band)
160.000 MHz (H-band)
• High/Low switch: Low
• No audio applied to the [MIC] jack.
• DTCS code : 007
• Transmitting
Top
panel
Connect an FM devia-
tion meter with an
oscilloscope to the
antenna connector
through an attenuator.
MAIN R150
ADJUSTMENT ADJUSTMENT CONDITIONS
UNIT LOCATION
VALUE
UNIT ADJUST
MEASUREMENT ADJUSTMENT
connect (soldering) here
DC power supply
,
.
see detailed illustration
below
Power supply connection
VR board
connect (soldering)
, line here
R150
DTCS wave
form adjustment
FM deviation
meter
Oscilloscope
Attenuator
F3/S
• MAIN unit