Icom IC-756 Instruction Manual page 31

RECEIVE AND TRANSMIT 4
E Filter selection
The filter selection switches the IF passband width as e Optional filter information
shown in the table at right.
ZETT
A AE
333
O
"FL-100 | 500 Hz/-6 dB | CW-N, RTTY-N
FL-101 | 250Hz/-6dB | CW-N, RTTY-N
SSB-N, CW-N,
FL-223 | 1.9kHz/-6 dB RTTY-N
FL-232 | 350Hz/-6dB | CW-N, RTTY-N
FL-52A | 500Hz/-6 dB | CW-N, RTTY-N
FL-53A | 250Hz/-6 dB | CW-N, RTTY-N
SSB-N, CW-N,
FL-222 | 1.8kHz/-6dB | BV
The filter selection is automatically memorized in each
mode.
When an optional filter is installed, set the optional fil-
ter setting in set mode. (p. 55) Optional filters are not
selected by default.
®© If the start up screen is not selected (if [F-5]'s func-
tion is [EXIT]), push [F-5] one or more times to exit.
@ Push the desired mode switch.
@ Push [(F-2)FILTER] to enter the filter selection
screen.
- The lines show the selectable combination of IF filters.
(4) Push [(F-2)9MHz] or [(F-4)455kHz] one or more
Z FL-257 information
times to select the 9 MHz or 455 kHz IF filter, re- Y The IC-756 can use the optional FL-257 SSB WIDE
spectively. PDA Y FILTER. It has 3.3 kHz/-6 dB passband width.
- Push [(F-3)DEF] to select a default filter combination for Y
the selected mode. Y To use the FL-257, select FL-222 and SSB
®© Repeat steps @ to ® if desired. f mode i ang E
Z
© Push [(F-5)EXIT] to exit the filter selection screen.
¢ Filter construction
9 MHz IF filter 455 kHz IF filter
Biers (ress i)
FL-223 (1.9 kHz)
FL-100 (500 Hz) FL-222 (1.8 kHz)
FL-232 (350 Hz) FL-52A (500 Hz)
FL-101 (250 Hz) FL-53A (250 Hz)
optional optional
2nd IF signal 3rd IF signal
e Filter selection screen
@2.4k 6532.2 /I {31%
" 14.195.00
lx 14.106.060 USB
USB
UFO
14.205.00
= ix 14.100.009 USB
Shi RCFILTER SELECTION] m a s
IE 15k Jj
Selected filter OF oe ;
— aa a
E NONE J (455 kHz)
Selectable combinations
[C NONE 3}
ne
9 MHz filter Default filter 455 kHz filter
selection selection selection
28