46
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.
1. Rotate the [CONT/APF] knob to achieve the
most natural-sounding audio reproduction of the
incoming signal.
● Rotate the [CONT/APF] knob, the center frequen
-
cy (50 Hz - 3200 Hz) of the Contour is displayed.
● Press and hold the [NOTCH] knob to return the
center frequency to its initial value and disable
the Contour function.
● 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] key.
2.
Select [OPERATION SETTING]→[RX DSP]
→[CONTOUR LEVEL].
3. Rotate the [MULTI] knob to set the CONTOUR
circuit gain.
4. Press the [FUNC] key to save the new setting
and exit the Setting Menu.
5. Press the [FUNC] key to exit to normal operation.
• Sets the Bandwidth (“Q”) of the
CONTOUR Circuit
1. Press the [FUNC] key.
2.
Select [OPERATION SETTING]→[RX DSP]
→[
CONTOUR WIDTH].
3. Rotate the [MULTI] knob to set bandwidth (“Q”)
of the CONTOUR circuit.
4. Press the [FUNC] key to save the new setting
and exit the Setting Menu.
5. Press the [FUNC] key to exit 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
For the SUB band, the same
functions as to operate.
