Yaesu FTDX5000 CAT BOOK, Руководство по эксплуатации

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Page 61 FT
DX
5000 O
PERATING
M
ANUAL
WIDTH
(
IF DSP B
ANDWIDTH
)
T
UNING
(
SSB/CW/RTTY/PKT M
ODES
)
The IF Width tuning system allows you to vary the width of the DSP IF filter passband, to eliminate interference. Moreover,
the bandwidth may actually be
expanded from its default setting, should you wish to enhance incoming signal fidelity when
interference on the band is low.
I
NTERFERENCE
R
EJECTION
(
S
IGNALS WITHIN
3
KHZ
)
VFO-A WIDTH Operation
ˆ Press the ( VFO-A
)[
WIDTH
] button. The current band-
width will appear in the SUB DISPLAY- II window.
The (
VFO-A
)[
SELECT
] knob will now function as
the WIDTH knob.
ˆ Rotate the ( VFO-A
)[
SELECT
] knob to the left or right
to reduce the interference.
ˆ Press the ( VFO-A
)[
CLEAR
] button in briefly, to set
the bandwidth to default. When the bandwidth is set to
default, the (
VFO-A
)[
WIDTH
] button glows red.
VFO-B WIDTH Operation
ˆ Press the ( VFO-B
)[
WIDTH
] button. The current band-
width will appear in the SUB DISPLAY- III window.
The (
VFO-B
)[
SELECT
] knob will now function as
the WIDTH knob.
ˆ Rotate the ( VFO-B
)[
SELECT
] knob to the left or right
to reduce the interference.
ˆ Press the ( VFO-B
)[
CLEAR
] button in briefly, to set
the bandwidth to default. When the bandwidth is set to
default, the (
VFO-B
)[
WIDTH
] button glows red.
Referring to Figure “
B
”, you can see the default band-
width (the [ WIDTH
] button glows red).
By rotating the [ SELECT
](width) knob to the left, the
bandwidth will narrow (see Figure “
A
”). Rotation of
the [ SELECT
](width) knob to the right, as depicted
in Figure “ C ,” will widen the bandwidth.
The default bandwidth, and total bandwidth adjustment
range, will vary according to the operating mode and
the [
NAR
] button setting:
(VFO-A)[SELECT] Knob (VFO-B)[SELECT] Knob
(VFO-B)[WIDTH] Button
[CLEAR] Button
(VFO-A)[WIDTH] Button
[CLEAR] Button
A
DVICE
:
You may select the display pattern shown in the SUB DIS-
PLAY window from three patterns via Menu item “ 019
DISP SELECT ”. See page 122 for details.
OFF
1.8 kHz - 4.0 kHz / 16 steps (2.4 kHz Ú
)
500 Hz - 2.4 kHz / 7 steps (2.4 kHz Ú
)
500 Hz - 2.4 kHz / 7 steps (500 Hz Ú
)
500 Hz - 2.4 kHz / 7 steps (500 Hz Ú
)
ON
200 Hz - 1.8 kHz / 9 steps (1.8 kHz Ú
)
50 Hz - 500 Hz / 10 steps (500 Hz Ú
)
50 Hz - 500 Hz / 10 steps (300 Hz Ú
)
50 Hz - 500 Hz / 10 steps (300 Hz Ú
)
MODE
LSB/USB
CW
RTTY
(
LSB
)
PKT
(
LSB/USB
)
NAR S
WITCH
Ú
: Default (the [ WIDTH
] button glows red)
IF
BANDWIDTH
IF
BANDWIDTH
IF
BANDWIDTH
A B C
N
OTE
:
When rotating the [ SELECT
](
WIDTH
) knob counter-
clockwise, the transition between 50 Hz and 25 Hz band-
width may be accompanied by a “ping” sound, depending
on the amount of noise present. This is a normal condi-
tion, and you should turn down the volume, when wearing
headphones, to minimize the amplitude of this momentary
sound.