Icom IC-7851 - DSP Filter Shape; Roofing Filter Selection

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FUNCTIONS FOR RECEIVE
D
DSP lter shape
The DSP filter shape for SSB, SSB data and CW can
be independently set to soft or sharp.
q Hold down [FILTER] for 1 second.
• The Filter screen is displayed.
w Select the SSB, SSB-D1 or CW mode.
Push [FILTER] several times to set the desired IF e
filter to FIL1 (Wide), FIL2 (Mid) or FIL3 (Narrow).
e Push [SHAPE](F) several times to set the desired
filter shape to soft or sharp.
• When selecting SSB-D2 or SSB-D3, and the 1.2 kHz
roofing filter, you can select the filter shape.
r Push [EXIT•SET].
• Exits the Filter screen.
The filter shape can be independently set for the
Main and Sub bands, only when different modes are
set.
• When selecting “SHARP”
[EXIT/SET]Mode keys
(F) Function keys [FILTER] MAIN, SUB
• Roong lter screen
D
Roong lter selection
The IC-7851 has 1.2, 3, 6 and 15 kHz roofing filters for
the 1st IF frequency. The roofing filter provides interfer-
ence reduction from nearby strong signals.
Push [ROOFING](F) to set the desired filter width to 
1.2, 3, 6, or 15 kHz (default).
• Hold down [DEF](F) for 1 second to select the default
value.
Mode FIL1 FIL2 FIL3 Mode FIL1 FIL2 FIL3
SSB 15 15 6 RTTY 15 6 6
SSB-D 6 6 6 PSK 6 6 6
CW 6 6 6 AM 15 15 15
• Roong lter default value (kHz)