Icom IC-R8600 - Digital IF Filter Selection and Adjustment; Filter Shape Selection

5
OTHER FUNCTIONS
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5-3
Selecting the digital IF lter
The IC-R8600 has 3 digital IF lter passband widths for
each receive mode.
z Touch the lter icon several times to select FIL 1
(wide), FIL 2 (mid) or FIL 3 (narrow).
L Each touch changes the lter.
D Adjusting the passband width
1. Touch the filter icon for 1 second.
2. Touch [BW].
• Selects the passband width mode.
L You cannot change the passband width in the FM,
WFM or DIGITAL modes.
3. Rotate
MAIN DIAL
to adjust the passband width.
L When you change the passband width, the Twin PBT
setting is reset to the center position.
4. In the SSB or CW mode, you can change the filter
shape by touching [SHARP] or [SOFT].
LSee "Selecting the lter shape" to the right.
5. To close the FILTER screen, push
EXIT
several
times.
Mode IF lter
(default)
Selectable range (steps)
SSB
FIL 1 (3.0 kHz)
50 Hz to 500 Hz (50 Hz)/
600 Hz to 3.6 kHz (100 Hz)
FIL 2 (2.4 kHz)
FIL 3 (1.8 kHz)
CW
FIL 1 (1.2 kHz)
50 Hz to 500 Hz (50 Hz)/
600 Hz to 3.6 kHz (100 Hz)
FIL 2 (500 Hz)
FIL 3 (250 Hz)
FSK
FIL 1 (2.4 kHz)
50 Hz to 500 Hz (50 Hz)
600 Hz to 2.7 kHz (100 Hz)
FIL 2 (500 Hz)
FIL 3 (250 Hz)
AM
S-AM
FIL 1 (9.0 kHz)
200 Hz to 10.0 kHz (200 Hz)FIL 2 (6.0 kHz)
FIL 3 (3.0 kHz)
FM
FIL 1 (50 kHz)
FixedFIL 2 (15 kHz)
FIL 3 (7.0 kHz)
WFM FIL 1 (200 kHz) Fixed
D-STAR
P25
NXDN
-n
FIL 1 (15 kHz)
FixedFIL 2 (10 kHz)
FIL 3 (7.0 kHz)
dPMR
NXDN
-vn
DCR
FIL 1 (10 kHz)
FixedFIL 2 (7.0 kHz)
FIL 3 (5.0 kHz)
D Selecting the lter shape
In the SSB or CW mode, you can independently
set the DSP lter shape to soft or sharp for each
operating mode.
SHARP
This selection is to emphasize the passband width
of the lter. The lter has an almost ideal shape
factor. Signals out of the passband are extremely
ltered out and it gives you better audio quality.
SOFT
The lter shoulders are roundly formed as in analog
lters. This decreases noise components in the
high and low frequencies of the lter passband and
increases the S/N ratio of the target signal. These
characteristics play an effective role in picking up
very weak signals. The lter shape is kept, and the
sharpness of the bandpass is excellent.
Passband width mode
[Receiving mode and the IF lter]