If Noise Blanker (Nb) Operation - Yaesu FTDX9000D - DATA MANAGEMENT Operation Manual

I R
EJECTION ( S
NTERFERENCE
The FT 9000D includes an effective IF Noise Blanker, which can significantly reduce noise caused by automotive
DX
ignition systems.
MAIN (VFO-A) [ NB ] knob
SUB (VFO-B) [ NB ] knob
Main (VFO-A) Band NB Operation
1. Press the Main band's (VFO-A) [ NB ] switch momen-
tarily 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 band's (VFO-A) [ 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 operat-
ing.
2. Advance the Main band's (VFO-A) [ NB ] control to
the point where the offending ignition noise is best
reduced or eliminated.
To end Noise Blanker operation, press the Main band's
(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.
Page 80
IGNALS WITHIN
IF N B
OISE LANKER
MAIN (VFO-A) [ NB ] switch
SUB (VFO-B) [ NB ] switch
)
3
KHZ
( NB ) O
PERATION
SUB (VFO-B) [ RX ] switch
Sub (VFO-B) Band NB Operation
1. Press the Sub band's (VFO-B) [ RX ] switch to engage
Dual Receive operation.
2. Press the Sub band's (VFO-B) [ NB ] switch momen-
tarily 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 band's (VFO-B) [ NB ] switch
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.
3. Advance the Sub band's (VFO-B) [ NB ] control to
the point where the offending ignition noise is best
reduced or eliminated.
To end Noise Blanker operation, press the Sub band's
(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.
FT 9000D O
DX
M
PERATION ANUAL