Yaesu FTDX5000 User Manual

Page 58 FTDX5000 OPERATING MANUAL
CONTOUR CONTROL OPERATION
The Contour Filter system produces a gentle perturbation of the IF filter passband. The different frequency components of
the signal can be suppressed or enhanced, thus improving the sound and/or readability of the received signal.
I NTERFERENCE R EJECTION
(
S IGNALS WITHIN 3 KHZ
)
VFO-A Contour Operation
 Press the
(
VFO-A
)[
CONT/APF
]
button. The button
will glow red and the position of the “null” (or “Peak”)
of the contour filter will be indicated in the SUB DIS-
PLAY-II window. The
(
VFO-A
)[
SELECT
]
knob will
now function as the contour knob.
 Rotate the
(
VFO-A
)[
SELECT
]
knob to achieve the
most pleasing audio reproduction of the incoming sig-
nal.
 Press the
(
VFO-A
)[
CLEAR
]
button in briefly, to
quickly move the “null” (or “Peak”) position to center.
 To cancel Contour tuning, press the
(
VFO-A
)[
CONT/
APF
]
button once more.
ADVICE:
 The contour filter null or peaking level may be adjusted
using Menu item “112 RDSP CNTR LV”. The factory
default null setting is “
–15–15
–15–15
–15” (dB).
 The bandwidth over which the contour null or peaking
affect is applied may be adjusted using Menu item “113
RDSP CNTR WI”. The factory default setting is “
1010
1010
10”.
 You may select the display pattern shown in the SUB
DISPLAY window from three patterns via Menu item
“019 DISP SELECT”. See page 122 for details.
 When the optional DMU-2000 Data Management Unit
is connected, the Audio Scope (on the DMU-2000 “Os-
cilloscope” page) is particularly useful when adjusting
the Contour controls. You can see the affect of the
Contour system on the signal levels, and the position
of the null/peak with respect to frequency components
of interest. On the Audio Scope, you may visually ob-
serve the affect of the Contour Controls while listen-
ing to the signal, this will help build your intuition on
how best to use Contour tuning in the future.
VFO-B Contour Operation
 Press the
(
VFO-B
)[
CONT/APF
]
button. The button
will glow red and the current “null” (or “Peak”) posi-
tion of the contour filter will be indicated in the SUB
DISPLAY-III window. The
(
VFO-B
)[
SELECT
]
knob
will now function as the contour knob.
 Rotate the
(
VFO-B
)[
SELECT
]
knob to achieve the
most natural-sounding audio reproduction of the in-
coming signal.
 Press the
(
VFO-B
)[
CLEAR
]
button in briefly, to
quickly move the “null” (or “Peak”) position to center.
 To cancel Contour tuning, press the
(
VFO-A
)[
CONT/
APF
]
button once more.
(
VFO-A
)[
SELECT
]
Knob
(
VFO-B
)[
SELECT
]
Knob
(
VFO-B
)[
CONT/APF
]
Button
[
CLEAR
]
Button
(
VFO-A
)[
CONT/APF
]
Button
[
CLEAR
]
Button
QUICK POINT:
When adjusted aggressively, the steep slopes of the DSP
filtering can impart an unnatural sound to an incoming sig-
nal. Often, a narrow bandwidth is not the key to improved
copy. The incoming signal itself may have undesirable or
excessive frequency components, especially in the low fre-
quency range around 100-400 Hz. By judicious use of the
Contour filter, the “shoulder” of the passband response
may be altered, or components removed from within the
passband, allowing the desired signal to rise above the
background noise and interference in a manner not ob-
tainable with other filtering systems.
HIJKHIJKHIJKHIJKHIJKHIJKHIJKHIJKHIJKHIJKHIJKHIJKHIJKHIJKHIJKHIJKHIJKHIJKHIJKHIJKHIJKHIJKHIJKHIJKHIJKHIJKHIJKHIJK

Yaesu FTDX5000 Specifications

General

Brand	Yaesu
Model	FTDX5000
Category	Transceiver
Language	English