Yaesu FTDX-9000D, Руководство по эксплуатации

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Page 75 FT
DX
9000D O
PERATION
M
ANUAL
SUB(VFO-B)
NB switch
MAIN(VFO-A)
NB knob
MAIN(VFO-A)
NB switch
SUB(VFO-B)
NB knob
MAIN (VFO-A)
SUB(VFO-B)
RX switch
SUB (VFO-B)
IF N
OISE
B
LANKER
(
NB
)
O
PERATION
The FT
DX
9000D includes an effective IF Noise Blanker, which can significantly reduce noise caused by automotive
ignition systems.
Main (VFO-A) Band NB Operation
1. Press the Main (VFO-A) band’s NB switch (# )
momentarily to reduce a short pulse noise such as from
switching transients, automobile ignitions and power
lines. The LED imbedded in the switch will glow Red
to confirm that the Narrow-NB is operating.
Press and hold the Main (VFO-A) band’s NB switch
for two seconds to reduce a longer duration man-made
pulse noise. The LED imbedded in the switch will glow
Yellow to confirm that the Wide-NB is operating.
2. Advance the Main (VFO-A) band’s NB control
(#
) to the point where the offending ignition noise
is best reduced or eliminated.
To end Noise Blanker operation, press the Main (VFO-A)
band’s NB switch once more. The LED imbedded in
the switch will turn off, confirming that the Noise Blanker
is no longer in operation.
Sub (VFO-B) Band NB Operation
1. Press the Sub (VFO-B) band’s RX switch (# ) to
engage Dual Receive operation.
2. Press the Sub (VFO-B) band’s NB switch (# )
momentarily to reduce a short pulse noise such as from
switching transients, automobile ignitions and power
lines. The LED imbedded in the switch will glow
Umber to confirm that the Narrow-NB is operating.
Press and hold the Sub (VFO-B) band’s NB switch
(#
) switch for two seconds to reduce a longer du-
ration man-made pulse noise. The LED imbedded in
the switch will glow Yellow to confirm that the Wide-
NB is operating.
3. Advance the Sub (VFO-B) band’s NB control (# )
to the point where the offending ignition noise is best
reduced or eliminated.
To end Noise Blanker operation, press the Sub (VFO-B)
band’s NB switch once more. The LED imbedded in
the switch will turn off, confirming that the Noise Blanker
is no longer in operation.
Advice
When the Roofing filter mode is set to “AUTO” and the
Noise Blanker is turned On, the Roofing Filter bandwidth
will automatically be set to 15 kHz.
I
NTERFERENCE
R
EJECTION
(S
IGNALS WITHIN
3
KHZ
)