If Noise Blanker (Nb) Operation; Audio Peak Filter (Apf) Operation - Yaesu FT DX 9000 CONTEST Operation Manual

I I I I I R R R R R
EJECTION ( S S S S S
NTERFERENCE NTERFERENCE NTERFERENCE EJECTION EJECTION
NTERFERENCE NTERFERENCE EJECTION EJECTION
The FT 9000 Contest includes an effective IF Noise Blanker, which can significantly reduce noise caused by automo-
DX
tive ignition systems.
1. Press the [ NB ] switch momentarily to reduce a short
pulse noise such as from switching transients, auto-
mobile ignitions and power lines. The LED imbedded
in the switch will glow Red to confirm that the Nar-
row-NB is operating.
Press and hold the [ NB ] switch for 2 seconds to re-
duce a longer duration man-made pulse noise. The
LED imbedded in the switch will glow Yellow to con-
firm that the Wide-NB is operating.
A
UDIO
In the CW mode, the Audio Peak Filter (APF) is useful to receive the very-weak CW signal.
Press and hold the [ CONT ] switch for 2 seconds to acti-
vate the Audio Peak Filter (APF) circuit. The LED inside
the [ CONT ] switch will blink umber for 3 seconds, then
replaces to continuous glow. The APF is an automatic cir-
cuit, and there is no adjustment knob for the APF.
To disable the APF, press the [ CONT ] switch momen-
tarily; the imbedded LED will turn off.
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IGN IGN IGN IGNALS ALS ALS ALS WITHIN WITHIN WITHIN WITHIN
IGN ALS WITHIN
IF N B
OISE LANKER
[ NB ] Knob
[ NB ] Switch
( APF ) O
P F
EAK ILTER
)
3 3 3 3 3
KHZ KHZ KHZ
KHZ KHZ
( NB ) O
PERATION
2. Advance the [ NB ] control to the point where the of-
fending ignition noise is best reduced or eliminated.
To end Noise Blanker operation, press the [ NB ] switch
once more. The LED imbedded in the switch will turn
off, confirming that the Noise Blanker is no longer in op-
eration.
( CW M
PERATION
[ CONT ] Switch
N
The FT 9000 Contest can not operate the
DX
CONTOUR and APF at the same time.
FT 9000 C
DX ONTEST
VDD BIAS TEMP SWR
)
ODE
VDD BIAS TEMP SWR
OTE
O M
PERATION ANUAL