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42
5
FUNCTIONS FOR RECEIVE
5-11 Selecting IF filters
Optional filters can be installed in the IF stage of the
IC-746 (p. 78). Both 9 MHz and 455 kHz IF filters are
available. When an optional filter is installed, set the
optional filter setting using filter program mode (see
below). Filters can be independently selected for each
operating mode.
FIL
F1
F2
F3
F4
F5
2.4k - 2.4k
9M 455k
FIL
2.4k - 2.4k
9M 455k
Selects 455 kHz band filter
Selects 9 MHz band filter
[FILTER]
CFJ455k (2.4 kHz)
(standard)
FL-272 (2.4 kHz)
(standard)
9 MHz
(optional 1)
9 MHz
(optional 2)
455 kHz
(optional)
SFPC455G (9 kHz)
(standard)
SFPC-455E (15 kHz)
(standard)
FL-53A (250 Hz)
FL-52A (500 Hz)
FL-222 (1.8 kHz)
FL-96 (2.8 kHz)
FL-257 (3.3 kHz)
FL-101 (250 Hz)
FL-232 (350 Hz)
FL-100 (500 Hz)
FL-223 (1.9 kHz)
FL-103 (2.8 kHz)
Mixer
9 MHz IF filter
455 kHz IF filter
• 9 MHz optional filters
• 455 kHz optional filters
3rd LO
through
FILTER CONSTRUCTION
☞
NOTE: one 455 kHz
optional filter can be
installed; two 9 MHz
optional filters can be
installed.
■
FILTER PROGRAM MODE SETTINGS
➀
Push [FILTER] for 2 sec. to select filter program
mode.
➁
Push a mode key to select an operating mode for
the filter setting.
➂
Push [FILTER] to set the filter condition to normal or
narrow.
• “NAR” appears when narrow is selected.
➃
Push [F2](
9M
) or [F4](
455k
) one or more times to
select a 9 MHz filter or a 455 kHz filter, respectively.
➄
Repeat steps
➁
to
➃
to set filters for other operat-
ing modes, if desired.
➅
Push [MENU] to return to regular operation.
☞
NOTE: See p. 78 for activating the installed optional
filter(s).
Summary of Contents for IC-746
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