If Filter Selection - Icom IC-7851 Instruction Manual

7
FUNCTIONS FOR RECEIVE

■ IF filter selection

The transceiver has 3 IF filter passband widths for
each mode, and are selectable in the Filter screen.
You can toggle the IF filter between FIL1 (Wide), FIL2
(Mid) and FIL3 (Narrow) by pushing [FILTER].
The IF filter passband widths for each mode can be
changed in the Filter screen.
D IF filter selection
q
Hold down [FILTER] for 1 second.
• The Filter screen is displayed.
w
Select any mode except FM.
• Passband widths for the FM modes are fixed, and can-
not be changed.
e
Push [FILTER] several times to set the desired IF
filter to FIL1 (Wide), FIL2 (Mid) or FIL3 (Narrow).
r
Push [BW](F) to enter the passband width adjust-
ment mode.
• "
" blinks.
t
Rotate [MAIN DIAL] to adjust the desired passband
width.
• The PBT shift frequencies are cleared when the pass-
band width is changed.
• Hold down [DEF](F) for 1 second to select the default
value.
• When the passband width is set to 500 Hz or less in the
SSB or CW mode, the bandpass filter for receive is au-
tomatically selected, and "
y
Push [BW](F).
• Exits the passband width adjustment mode.
u w to y to set another mode's pass-
Repeat steps
band width.
i
Push [EXIT/SET].
• Exits the Filter screen.
The filter selection is automatically memorized in
each mode.
The PBT shift range is automatically memorized in
each filter.
Mode IF filter
FIL1 (3.0 kHz)
SSB FIL2 (2.4 kHz)
FIL3 (1.8 kHz)
FIL1 (1.2 kHz)
SSB-D
CW FIL2 (500 Hz)
PSK
FIL3 (250 Hz)
FIL1 (2.4 kHz)
RTTY FIL2 (500 Hz)
FIL3 (250 Hz)
FIL1 (9.0 kHz)
AM
FIL2 (6.0 kHz)
AM-D
FIL3 (3.0 kHz)
FIL1 (15 kHz)
FM
FIL2 (10 kHz)
FM-D
FIL3 (7.0 kHz)
" is displayed
Adjustable range (steps)
50 to 500 Hz (50 Hz)
600 Hz to 3.6 kHz (100 Hz)
50 to 500 Hz (50 Hz)
600 Hz to 3.6 kHz (100 Hz)
50 to 500 Hz (50 Hz)
600 Hz to 2.7 kHz (100 Hz)
200 Hz to 10 kHz (200 Hz)
Fixed to the default value
(F) Function keys
• When selecting "FIL1" (Wide)
• When selecting "FIL2" (Mid)
• When selecting "FIL3" (Narrow)
• While adjusting the passband width
Blinks
• When selecting the passband width (500 Hz or less)
For your reference:
• While holding down [BW](F), rotating [MAIN DIAL]
also adjusts the passband width.
• When you set the IF filter to FIL2 or FIL3 in the
FM mode, transmission is made in the FM narrow
mode.
7-6
[FILTER] MAIN, SUB
[MAIN DIAL]
[EXIT/SET]