If Noise Blanke (Nb) Operation - Yaesu FT DX 9000 CONTEST - MANUAL 2 Operation Manual

D R
UAL ECEIVE
If the optional Dual Receive Unit (RXU-9000) is installed, IF Noise Blanker operation is available on both the VFO-A and
VFO-B. Operation is identical on either VFO.
As a reminder, there is no difference in the fundamental performance of the two VFOs. Please see page 62 for details.
VFO-A Band NB Operation
1. Press the VFO-A NB switch (#
reduce a short pulse noise such as from switching tran-
sients, 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 VFO-A NB switch (#
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 VFO-A NB control (#
where the offending ignition noise is best reduced or
eliminated.
To end Noise Blanker operation, press the VFO-A NB
switch (# ) once more. The LED imbedded in the switch
will turn off, confirming that the Noise Blanker is no longer
in operation.
VFO-B Band NB Operation
1. Pressing the SUB RX switch (#
Dual Receive operation.
When the imbedded LED glows green, this is your
confirmation that Dual Receive is in operation.
2. Press the VFO-B NB switch (#
reduce a short pulse noise such as from switching tran-
sients, 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 VFO-B NB switch (#
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.
3. Advance the VFO-B NB control (#
where the offending ignition noise is best reduced or
eliminated.
To end Noise Blanker operation, press the VFO-B 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. However, you still
may override the automatic setting, and select a more nar-
row Roofing Filter.
Page 152
( RXU-9000 )
U
NIT
IF N B
OISE LANKE
) momentarily to
) for
) to the point
) will engage
) momentarily to
) for
) to the point
( NB ) O
PERATION
NB Knob
NB Switch
NB Switch
NB Knob
VFO-A
FT 9000 C
DX ONTEST
VFO-B
O M
PERATION ANUAL