Filter Selection - Icom IC-78 Instruction Manual

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Filter selection

The filter selection changes the IF passband width as
shown in the table to the right.
The filter selection is for temporal setting.
q Select the desired mode memory channel.
w Hold down [SET] for 1 second to enter the Quick
Set mode.
e Push [UP p] or [q DN] several times until "FIL-
TER" is displayed.
r Rotate the Channel Selector to select a desired
passband width.
• The "
" or " " does not appear when the normal
filter is selected.
• "
" is displayed when the wide filter is selected.
• "
" is displayed when the narrow filter is selected.
t Push [SET] to exit the Quick Set mode.
• Filter construction (Rx)
2nd IF signal
• Filter selection table
WIDE
SSB
NORMAL
NARROW
WIDE
CW
NORMAL
NARROW
WIDE
RTTY
NORMAL
NARROW
WIDE
NORMAL
AM
NARROW
* This selection can be used when the expanded filter selection function is turned ON in the Initial Set mode. (see next page)
†
No longer produced
(p. 12)
CFWS450HT (6 kHz)* 3
No
†
optional FL-52A FL-53A
filter
6 k* 6 k*
2.4 k 2.4 k
500*
6 k* 6 k*
2.4 k 2.4 k
500
6 k* 6 k*
2.4 k 2.4 k
500
6 k 6 k
2.4 k
2.4 k
500*
• Optional filter variations
Name
FL-52A †
FL-53A †
FL-96 †
FL-222
FL-257
When an optional filter is installed, set the optional
filter in the Initial Set mode. An optional filter is not
selected by default.
Through
1
FL-65 (2.4 kHz)*
2
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)*
† †
FL-96 FL-222
6 k*
6 k* 6 k*
2.8 k
2.4 k 2.4 k 2.4 k
250* 1.8 k
6 k*
6 k* 6 k*
2.8 k
2.4 k 2.4 k 2.4 k
250 1.8 k
6 k*
6 k* 6 k*
2.8 k
2.4 k 2.4 k 2.4 k
250 1.8 k
6 k 6 k 6 k
2.4 k 2.4 k 2.4 k
250* 2.8 k* 1.8 k*
OPERATION
Band width Mode
500 Hz/–6 dB CW/RTTY-N
250 Hz/–6 dB CW/RTTY-N
2.8 kHz/–6 dB SSB-W
1.8 kHz/–6 dB SSB-N
3.3 kHz/–6 dB SSB-W
2nd IF signal/DET
1
* AM; Narrow,
SSB/CW/RTTY; Normal
2
* OPTION
3
* AM; Normal,
SSB/CW/RTTY; Wide
FL-257
6 k*
3.3 k
2.4 k
6 k*
3.3 k
2.4 k
6 k*
3.3 k
2.4 k
6 k
2.4 k
3.3 k*
3
20