Icom IC-746 [44/88] 11 selecting if filters

Icom IC-746 [44/88] 11 selecting if filters
42
5
FUNCTIONS FOR RECEIVE
5-11 Selecting IF lters
Optional lters can be installed in the IF stage of the
IC-746 (p. 78). Both 9 MHz and 455 kHz IF lters 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]
CFJ
455k (
2.4 kHz)
(standard)
FL-272 (
2.4 kHz
)
(standard)
9 MHz
(optional 1)
9 MHz
(optional 2)
455 kHz
(optional)
SFPC
455G (
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 lters can be
installed.
FILTER PROGRAM MODE SETTINGS Push [FILTER] for 2 sec. to select filter program
mode.
Push a mode key to select an operating mode for
the lter setting.
Push [FILTER] to set the lter condition to normal or
narrow.
•“NAR appears when narrow is selected.
Push [F2](9M) or [F4](455k) one or more times to
select a 9 MHz lter or a 455 kHz lter, respectively.
Repeat steps to to set lters for other operat-
ing modes, if desired.
Push [MENU] to return to regular operation.
NOTE: See p.78 for activating the installed optional
lter(s).

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