Yaesu FTDX10, Operation Manual

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43
CONT/APF
CONT (Contour)
The Contour filter system provides a gentle per-
turbation of the IF filter passband. The Contour is
set to either suppress, or boost specific frequency
components, and thus enhances the sound and
readability of a received signal.
The CONTOUR function can be operated individu-
ally for VFO-A and VFO-B.
Press and hold the [CONT/APF] key to return the
center frequency to its initial value.
1. Rotate the [CONT/APF] knob to achieve the
most natural-sounding audio reproduction of the
incoming signal.
● While CONTOUR filter is activated, the LED in -
side this key glows orange.
● Rotate the [CONT/APF] knob, the center frequen -
cy (50Hz - 3200Hz) of the Contour is displayed.
● In the Filter Function Display, the attenuation in
the passband can be observed.
2. To exit from Contour tuning, press the [CONT/
APF] key momentarily.
• Adjust the GAIN of the
CONTOUR Circuit
1. Press the [FUNC] knob.
2. Select [OPERATION SETTING]→[RX DSP]
→[CONTOUR LEVEL].
3. Rotate the [FUNC] knob, or touch “<” or “>” on
either side of the value to set the CONTOUR cir-
cuit gain.
4. Press the [FUNC] knob to save the new setting.
5. Touch [BACK] several times to return to normal
operation.
• Sets the Bandwidth (“Q”) of the
CONTOUR Circuit
1. Press the [FUNC] knob.
2. Select [OPERATION SETTING]→[RX DSP]
→[ CONTOUR WIDTH].
3. Rotate the [FUNC] knob, or touch “<” or “>” on
either side of the value to set bandwidth (“Q”) of
the CONTOUR circuit.
4. Press the [FUNC] knob to save the new setting.
5. Touch [BACK] several times to return to normal
operation.
Refer to Figure “B”, this illustrates an “indentation”
of the Contour filter in the center of the passband.
Counterclockwise rotation (to the left) of the
[CONT/APF] knob causes the notch to move to-
ward a lower frequency within the passband (fig. A),
while clockwise rotation (to the right) causes the
notch to move toward a higher frequency within
the passband (fig. C). By removing interference or
unwanted frequency components of the incoming
signal, it is possible to make the desired signal
rise out of the background noise/interference, and
enhance intelligibility.
CONT/APF knob CONT/APF knob CONT/APF knob
IF BANDWIDTH IF BANDWIDTH IF BANDWIDTH
B A C
APF (Audio Peak Filter)
During CW operation, when interference or noise is
present, the center frequency is automatically set to
the PITCH frequency, making it easier to hear the
desired signal.
The APF function can be operated individually for
VFO-A and VFO-B (The settings are common to
VFO-A and VFO-B).
Press and hold the [CONT/APF] key to restore the
APF peak center frequency setting to “0Hz”.
1. Rotate the [CONT/APF] knob to the left or right
to reduce any interference.
● While APF is activated, the LED inside this key
glows orange.
● Rotate the [CONT/APF] knob to display the cen -
ter frequency (-250Hz - +250Hz) of the audio
peak filter.
● Press and hold the [CONT/APF] key to restore
the APF peak center frequency setting to “0Hz”,
and disable the APF function.
● The display will show the peak position of the
APF, while tuning the [CONT/APF] knob.
The APF bandwidth can be selected from
NARROW / MEDIUM / WIDE via the Menu
item “APF WIDTH” (page 101).
2. To exit from APF operation, press the [CONT/
APF] key again.