Selecting The If Filter - Icom IC-718 Basic Manual

Selecting the IF filter

The filter selection adjusts the IF bandpass width, as
shown to the right.
L Each operating mode memorizes the IF filter setting.
1. Select the desired mode with the mode keys.
2. Push [FIL] several times to select the desired filter
combination.
W N
• or is not displayed when using the Normal
(standard) IF filter.
W
• is displayed when the Wide IF filter is selected.
N
• is displayed when the Narrow IF filter is selected.
Filter selection table
Filter
Mode
width
WIDE
SSB NORMAL
NARROW
WIDE
CW
RTTY
NORMAL
NARROW
WIDE
NORMAL
AM
NARROW
L To use the filters marked with
Refer to the next page and set the short-pin to the position according to your desired filter width.
Expanded
filter
None 52A
OFF
ON
OFF/ON
OFF
ON – 500
OFF
ON
OFF/ON
OFF/ON
– 500
OFF/ON
OFF/ON
OFF
ON 2.4 k 500
, you must set the short-pin on the main board.
RECEIVING AND TRANSMITTING
Filter
Standard
52A
53A
Optional 96
222
257
Filter image
Standard filter
(Through)
2nd IF
Standard filter
signal
Optional filter
(Either one is selectable)
Optional filter
53A 96
– 2.8 k
6 k
2.4 k
–
250 –
– 2.8 k
6 k
2.4 k
250 –
–
6 k
2.4 k
250 2.8 k
Band width Mode
SSB/CW/RTTY: Wide
6 kHz
AM: Normal
SSB/CW/RTTY: Normal
2.4 kHz
AM: Narrow
500 Hz/–6dB CW/RTTY: Narrow
250 Hz/–6dB CW/RTTY: Narrow
2.8 kHz/–6dB SSB: Wide
1.8 kHz/–6dB SSB: Narrow
3.3 kHz/–6dB SSB: Wide
(6 kHz)
2nd IF
(2.4 kHz) signal/DET
(Unit: Hz)
222 257
– 3.3 k
1.8 k –
– 3.3 k
1.8 k –
1.8 k 3.3 k
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
13