Digital Notch Filter (D.notch) Operation - Yaesu FT DX 9000 CONTEST Operation Manual

D
IGITAL
The Digital Notch Filter (D.NOTCH) is an effective beat-cancelling filter that can null out a number of interfering beat
notes inside the receiver passband. Because this is an Auto-Notch feature, there is no adjustment knob associated with this
filter.
Press the [ D.NOTCH ] switch to engage the Digital Notch
filter. The LED imbedded in the switch will glow Red, to
confirm that the DNF circuit is engaged.
To cancel D.NOTCH operation, press the [ D.NOTCH ]
switch once more. The imbedded LED will go out, con-
firming that the Digital Notch Filter is no longer in opera-
tion.
FT 9000 C O
DX ONTEST
I I I I I
NTERFERENCE NTERFERENCE NTERFERENCE
NTERFERENCE NTERFERENCE
N F
OTCH ILTER
[ D.NOTCH ] Switch
M
PERATION ANUAL
R R R R R
EJECTION ( S S S S S
EJECTION EJECTION
EJECTION EJECTION
( D.NOTCH ) O
PERATION
If a very strong interfering carrier is encountered,
we recommend you first use the IF Notch filter, as
it is the most effective notching tool in the receiver
section.
3 3 3 3 3
IGN IGNALS IGN IGN ALS ALS WITHIN ALS WITHIN WITHIN WITHIN KHZ KHZ KHZ
IGN ALS WITHIN KHZ KHZ
VDD BIAS TEMP SWR
A
DVICE
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