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VII
QUICK REFERENCE GUIDE
2001 NEW 2001 NEW
c. Notch: There are two notch systems on your IC-
746PRO.
Automatic: The automatic notch will track up to three
heterodynes. This is helpful for eliminating annoying
transmitter tune up tones on any band, and to min-
imize continuous tone heterodynes encountered on
the 40 meter phone bands at night, for example.
Once selected an icon will appear A NOTCH on
the display.
Manual: The Manual notch provides 70 dB of atten-
uation to pin point an interfering signal. The 12 o-
clock position is on the operating frequency, turning
the Notch knob clockwise moves the notch up the
band and counter clockwise will move the notch
down the band. Once selected an icon NOTCH will
appear on the display.
NOTE: Your IC-7400 is equipped with multiple
AGC circuits. This allows the DSP to lter out inter-
fering signals and QRM, while also taking this in-
terference out of the AGC. Bottom line, this will ei-
ther eliminate or greatly reduce the pumping of the
AGC from the interfering signal.
AGC
DUP
CMP
TBW
SCP
[A/NOTCH] [NOTCH]
Notch function indicators
NR NOTCH
Low frequency High frequency
Hint!
The Automatic Notch will not operate in the SSB
data, CW or RTTY modes.
d. Filters: Your IC-7400 has an incredible IF DSP
based lter network with over 100 settings.
Dial in your filters: By pushing [FILTER] for 1 sec.,
you enter the lter set mode. This is where you are
able set the three lter presets. Across the bottom of
the display you will see the BW icon. The switch di-
rectly below, along with the tuning dial, will be used
to select the changes you will make.
BW
Filter set mode indication
Shows the selected filter and passband width.
BW
Indication while setting
While pushing [F1 BW], rotate the tuning dial to set
passband width.
Reverses Appears
AGC
DUP
CMP
TBW
SCP
[FILTER]
The selected filter width is indicated
for approx. 1 sec. when [FILTER] is
pushed.
Filter selection
IC-7400.qxd 02.4.2 11:35 Page VII
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