Notch; (Interference Rejection "Signals Within 3 Khz") - Yaesu FT-450D Operation Manual

NOTCH ( I
The IF Notch filter is a highly effective system that allows you to slice out an interfering beat note or other carrier
signal from inside the receiver passband.
1. Press the [ DSP ] button several times to set the
" " icon to the "NOTCH" indicator of the DSP
Graphic Display on the display.
2. Press the [ DSP/SEL ] knob to engage the IF Notch
filter.
3. Rotate the [ DSP/SEL ] knob to adjust the center
frequency of the IF Notch Filter.
You may observe the graphically depicted peak
position of the IF Notch filter in the "NOTCH" indi-
cator of the DSP Graphic Display on the display.
4. To disable the IF Notch filter, press the [ DSP/SEL ]
button again. The graphically depicted peak po-
sition disappears from the "NOTCH" indicator of
the DSP Graphic Display on the display confirm-
ing that the IF Notch filter is no longer operating.
FT-450D O
PERATION
C
ONVENIENCE
R
NTERFERENCE
M
ANUAL
EJECTION "S
IGNALS WITHIN
"NOTCH" Indicator
[ DSP/SEL ] knob
The performance of the IF Notch filter is
shown in Figure "A", where the effect of rota-
tion of the [ DSP/SEL ] knob is depicted. In
Figure "B", you can see the notching effect
of the IF Notch filter as you rotate the [ DSP/
SEL ] knob to eliminate the incoming interfer-
ence.
A
Desired Signal
QRM
(Heterodyne)
IF
BANDWIDTH
F
EATURES
)
3 "
KHZ
[ DSP ] button
B
Desired Signal
QRM
(Heterodyne)
IF
BANDWIDTH
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