Yaesu FTDX-9000D, Руководство по эксплуатации

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Page 74 FT
DX
9000D O
PERATION
M
ANUAL
SUB(VFO-B)
DNF switch
MAIN(VFO-A)
DNF switch
MAIN (VFO-A) SUB (VFO-B)
SUB(VFO-B)
RX switch
D
IGITAL
N
OTCH
F
ILTER
(
DNF
)
O
PERATION
The Digital Notch Filter (DNF) 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.
Advice
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.
Main (VFO-A) Band DNF Operation
Press the Main (VFO-A) band’s DNF 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 DNF operation, press the Main (VFO-A) band's
DNF switch once more. The imbedded LED will go out,
confirming that the Digital Notch Filter is no longer in
operation.
Sub (VFO-B) Band DNF Operation
1. Press the Sub (VFO-B) band’s RX switch (# ) to
engage Dual Receive operation.
2. Press the Sub (VFO-B) band’s DNF switch (# )
to engage the Digital Notch filter. The LED imbed-
ded in the switch will glow Red, to confirm that the
DNF circuit is engaged.
To cancel DNF operation, press the Sub (VFO-B) band's
DNF switch once more. The imbedded LED will go out,
confirming that the Digital Notch Filter is no longer in
operation.
I
NTERFERENCE
R
EJECTION
(S
IGNALS WITHIN
3
KHZ
)