Filter Selection - Icom ic-718 Instruction Manual

5
RECEIVE AND TRANSMIT
 Filter selection
The fi lter selection adjusts the IF bandpass width, as
shown in the table to the right.
The filter selection is automatically memorized in
each mode.
q Select the desired mode with the mode keys.
w Push [FIL] one or more times to select the desired
fi lter combination.
• ã or ç does not appear while in the normal IF fi lter mode.
• ç appears when the wide IF fi lter is selected.
• ã appears when the narrow IF fi lter is selected.
When an optional fi lter is installed, set the optional
fi lter in the initial Set mode. An optional fi lter is not
selected by default.
• Filter image
2nd IF signal
• Filter selection table
SSB
CW
RTTY
AM
Note: *This selection can be used when the expanded filter selection function is turned ON in
the initial Set mode. (see right)
24
Standard Filter (6 kHz)***
No Optional
FL-52A
Filter
WIDE 6 k*
NORMAL 2.4 k 2.4 k
NARROW 500*
WIDE 6 k*
NORMAL 2.4 k 2.4 k
NARROW 500
WIDE 6 k*
NORMAL 2.4 k 2.4 k
NARROW 500
WIDE
NORMAL 6 k
2.4 k
NARROW 2.4 k
500*
• Optional fi lter variations
Name
FL-52A
FL-53A
FL-96 †
FL-222
FL-257
The narrower band width is for higher receive selec-
tivity.
Through
FL-65 (2.4 kHz)*
FL-257 (3.3 kHz)**
FL-96 (2.8 kHz)**
†
FL-222 (1.8 kHz)**
FL-52A † (500 Hz)**
FL-53A † (250 Hz)**
† FL-53A † FL-96
6 k*
6 k* 6 k*
2.8 k
2.4 k 2.4 k
250*
6 k*
6 k* 6 k*
2.8 k
2.4 k 2.4 k
250
6 k*
6 k* 6 k*
2.8 k
2.4 k 2.4 k
250
6 k 6 k 6 k
2.4 k 2.4 k
250* 2.8 k*
Band width
† 500 Hz/–6 dB CW/RTTY-N
† 250 Hz/–6 dB CW/RTTY-N
2.8 kHz/–6 dB
1.8 kHz/–6 dB
3.3 kHz/–6 dB
2nd IF signal/DET
* AM; Narrow,
SSB/CW/RTTY; Normal
** OPTION
*** AM; Normal,
SSB/CW/RTTY; Wide
† FL-222 FL-257
6 k*
6 k*
3.3 k
2.4 k 2.4 k
1.8 k
6 k*
6 k*
3.3 k
2.4 k 2.4 k
1.8 k
6 k*
6 k*
3.3 k
2.4 k 2.4 k
1.8 k
6 k 6 k
2.4 k 2.4 k
1.8 k* 3.3 k*
†
No longer produced
Mode
SSB-W
SSB-N
SSB-W
( Hz )