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Icom IC-78 Manual

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4
OPERATION
■ Filter selection
The filter selection switches the IF passband width as
shown in the table at right.
The filter selection is for temporal setting.
q Select the desired mode programmed channel.
(p. 13)
w Push [SET] for 1 sec. to enter
quick set mode
.
e Push [UPY] or [ZDN] several times until “FILTER”
appears on the display.
r Rotate the channel selector to select desired pass-
band width.
• Either “ ” or “ ” does not appear while the nor-
mal filter is selected.
•“ ” appears when the wide filter is selected.
•“ ” appears when the narrow filter is selected.
t Push [SET] to exit
quick set mode
.
•Optional filter variations
When an optional filter is installed, set the optional
filter in
initial set mode
. An optional filter is not se-
lected by default.
FL-65 (2.4 kHz)*
1
FL-257 (3.3 kHz)*
2
FL-96 (2.8 kHz)*
2
FL-222 (1.8 kHz)*
2
FL-52A (500 Hz)*
2
FL-53A (250 Hz)*
2
2nd IF signal
2nd IF signal/DET
CFWS450HT (6 kHz)*
3
Through
*
1
AM; Narrow,
SSB/CW/RTTY; Normal
*
3
AM; Normal,
SSB/CW/RTTY; Wide
*
2
OPTION
Name Band width Mode
FL-52A 500 Hz/–6dB CW/RTTY-N
FL-53A 250 Hz/–6dB CW/RTTY-N
FL-96 2.8 KHz/–6dB SSB-W
FL-222 1.8 KHz/–6dB SSB-N
FL-257 3.3 KHz/–6dB SSB-W
•Filter construction (Rx)
•Filter selection table
no FL-52A FL-53A FL-96 FL-222 FL-257
WIDE 6 kHz* 6 kHz* 6 kHz*
6 kHz*
6 kHz*
6 kHz*
SSB
2.8 kHz 3.3 kHz
NORMAL 2.4 kHz 2.4 kHz 2.4 kHz 2.4 kHz 2.4 kHz 2.4 kHz
NARROW — 500 Hz* 250 Hz* — 1.8 kHz* —
WIDE 6 kHz* 6 kHz* 6 kHz*
6 kHz*
6 kHz*
6 kHz*
CW
2.8 kHz 3.3 kHz
NORMAL 2.4 kHz 2.4 kHz 2.4 kHz 2.4 kHz 2.4 kHz 2.4 kHz
NARROW — 500 Hz 250 Hz — 1.8 kHz —
WIDE 6 kHz* 6 kHz* 6 kHz*
6 kHz*
6 kHz*
6 kHz*
RTTY
2.8 kHz 3.3 kHz
NORMAL 2.4 kHz 2.4 kHz 2.4 kHz 2.4 kHz 2.4 kHz 2.4 kHz
NARROW — 500 Hz 250 Hz — 1.8 kHz —
WIDE — — — — — —
AM
NORMAL 6 kHz 6 kHz 6 kHz 6 kHz 6 kHz 6 kHz
NARROW 2.4 kHz
2.4 kHz 2.4 kHz 2.4 kHz 2.4 kHz 2.4 kHz
500 Hz* 250 Hz* 2.8 kHz* 1.8 kHz* 3.3 kHz*
*Can be used when the expanded filter selection is turned on in the
initial set mode
. (see next page)
… 23 …


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