Dsp If Filter Types - Yaesu FT dx 1200 Operating Manual

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ools for
Using DSP arithmetic processing and the normal bandwidth characteristics of the DSP IF filter, the sound quality can be
made close to a conventional analog filter by rounding the shoulder of the filter, or importance can be placed on the filter
cut-off by making the skirt characteristics flat. In addition, an improved filter composition can be enjoyed depending on
the mode by combining the passing bandwidth characteristics and attenuation band characteristics.
1. Press the [ MENU ] button to engage the Menu mode.
2. Rotate the [ VFO-B/CLAR ] knob (or press the /
 button) to select the desired mode. See the tables
below for details.
3. Press the [ SELECT ] button.
4. Rotate the [ VFO-B/CLAR ] knob (or press the /
button) to adjust the sound quality.
[ CLEAR ]
 When the
can be returned to their initial values.
5. When the [ SELECT ] button is pressed followed by
the [ MENU ] button, the new setting will be con-
firmed and operation returns to normal.
Passing Bandwidth Characteristics
M b
ode And
CW HF
50MHz
PSK HF
FSK HF
SSB HF
50MHz
The following settings are available.
SHARP: Set the passing bandwidth of the IF filter
as amplitude characteristic. Using DSP
arithmetic processing, a sharp and ideal
shape factor will result.
SOFT: Set the characteristic of the IF filter as a
phase characteristic. Using DSP arithmetic
processing, the shoulder of the filter will
become rounded and the sound quality
will become close to that of a conventional
analog filter.
Attenuation Band Characteristics
M b
ode And
CW HF
50MHz
PSK HF
FSK HF
SSB HF
50MHz
"STEEP", "MEDIUM", and "GENTLE" are selectable
for the IF filter slope.
FT 1200 O
DX peraTing
c
omfortable anD
dSp iF F
button is pressed, the values
M i
enu teM
112 HF CW SHAPE
114 6M CW SHAPE
116 HF PSK SHAPE
118 HF FSK SHAPE
120 HF SSB SHAPE
122 6M SSB SHAPE
M i
enu teM
113 HF CW SLOPE
115 6M CW SLOPE
117 HF PSK SLOPE
119 HF FSK SLOPE
121 HF SSB SLOPE
123 6M SSB SLOPE
M
anual
e
ffective
t
ilter ypeS
[ MENU ] Button
SHARP
r
eception
[ SELECT ] Button [ CLEAR ] Button
[/] Button [ VFO-B/CLAR ] Knob
SOFT
STEEP
MEDIUM
GENTLE
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