Cont (Contour) Control Operation - Yaesu FTDX9000D - DATA MANAGEMENT Operation Manual

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The Contour filtering system provides a gentle perturbation of the IF filter passband, so as to suppress or enhance certain
frequency components modestly, so as to enhance the natural-sounding received signal.
MAIN (VFO-A) [ CONT ] switch
SUB (VFO-B) [ CONT ] switch
Using Contour on the Main (VFO-A) Receiver
1. Press the Main (VFO-A) [ CONT ] switch. The LED
imbedded in the switch will glow Red to confirm that
the Contour filter is engaged.
2. Rotate the Main (VFO-A) [ CONT ] knob to achieve
the most natural-sounding audio reproduction on the
incoming signal. To cancel Contour tuning, press the
Main (VFO-A) [ CONT ] switch once more.
The Sub band (VFO-B) frequency display will show the CONTOUR frequency for 3 seconds whenever the
[ CONT ] knob is turned.
You may disable this feature (displaying the CONTOUR frequency) via Menu item "DISPLAY 022 LEVEL
INDICATOR." See page 146 for details.
The TFT's Audio Scope (on the "Oscilloscope" page) is particularly useful when adjusting the Contour control.
Not only can you see the effect of the notch/peak of the Contour system, but you also can see the position of the
notch/peak with respect to frequency components of interest on the incoming signal. You may then observe (on
the Audio Scope) the effect of the Contour control while listening to the effect on the signal, and this will help
build your intuition on how best to use Contour tuning in the future.
The Width of the Contour filter effect, and the degree of nulling or peaking, may be adjusted using the menu.
The Contour filter's level (either nulling or peaking) may be adjusted using Menu Item "RX DSP 086
MAIN-CONTOUR-LEVEL" for Main band (VFO-A) and "RX DSP 089 SUB-CONTOUR-LEVEL"
for Sub band (VFO-B). The factory default setting is –15.
The bandwidth over which the Contour filter effect is applied may be adjusted using Menu Item "RX DSP
087 MAIN-CONTOUR-WIDTH" for Main band (VFO-A) and "RX DSP 090 SUB-CONTOUR-WIDTH"
for Sub band (VFO-B). The factory default setting is 10.
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ONTOUR ONTROL
MAIN (VFO-A) [ CONT ] knob
SUB (VFO-B) [ CONT ] knob
Using Contour on the Sub (VFO-B) Receiver
1. Pressing the Sub (VFO-B) band's [ RX ] switch will
2. Press the Sub (VFO-B) [ CONT ] switch. The LED
3. Rotate the Sub (VFO-B) [ CONT ] knob to achieve
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SUB (VFO-B) [ RX ] switch
engage Dual Receive operation.
When the imbedded LED grows green, this is your
confirmation that Dual Receive is in operation.
imbedded in the switch will glow Orange, confirm-
ing that the Contour filter is engaged.
the most natural-sounding audio reproduction on the
incoming signal. To cancel Contour tuning, press the
Sub (VFO-B) [ CONT ] switch once more.
FT 9000D O
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PERATION ANUAL