4 RECEIVE AND TRANSMIT
DOptional filter selection
Two optional filters can be installed in the IC- 706MKIIG.
Narrow filters help reject interference from adjacent signals and obtain good selectivity.
Wide filters provide improved audio for SSB opera- tion when no interfering signals are present.
Consult the table below to select a filter most suitable for your operating needs.
Narrow filters for AM/FM modes are standard.
FILTER PRESETTING:
After you install a filter (see p. 60 for installation), you must specify the installed filter in initial set mode (item 19 “OPT. FIL 1” or item 20 “OPT. FIL 2”; see p. 51).
FILTER ON/OFF:
➀Select M3.
•Push [DISPLAY] 1 or 2 times if G or S appears.
•Push [MENU] one or more times to select M3.
➁Push
•ã appears when the narrow filter is selected; ç appears when the wide filter is selected.
Note: When selecting the narrow filter, the graphic passband is narrowed (see diagram below).
Normal | narrow is |
operation | selected |
Filter variations
Name | Mode | Band width |
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CW, RTTY | 250 | |
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CW, RTTY | 350 | |
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CW, RTTY | 500 | |
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SSB, CW, RTTY | 1.9 | |
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SSB, CW, RTTY | 2.4 | |
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SSB, CW, RTTY | 2.8 | |
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AM, FM | 8 | |
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*Optional filter.
Optional filter installation and selection tables
SSB
| No |
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FIL 1 optional | ||||||
FIL 2 | filter |
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No | W: – – – | W: – – – | W: – – – | W:– – – | W: – – – | |
optional | M: | M: | M: | M: | M: | M: |
filter | N: – – – | N: – – – | N: – – – | N: – – – | N: | N: – – – |
W:– – – W: – – – W: – – –
N: – – – | N: – – – | N: – – – | N: – – – | N: |
W:– – – W: – – – W: – – –
N: – – – | N: – – – | N: – – – | N: – – – | N: |
W:
N: – – – | N: – – – | N: – – – | N: – – – | N: |
W:– – – W: – – – W: – – –
N:
W:– – – W: – – – W: – – – W:
N: – – – | N: – – – | N: – – – | N: – – – | N: |
Table key:
CW, RTTY
| No |
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FIL 1 optional | ||||||
FIL 2 | filter |
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No | W: – – – | W: – – – | W: – – – | W:– – – | W: – – – | |
optional | M: | M: | M: | M: | M: | M: |
filter | N: – – – | N: | N: | N: – – – | N: | N: |
W: – – – | W: – – – | W: | ||||
M: | M: | M: | M: | M: | M: | |
| N: | N: | N: | N: | N: | N: |
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| W: – – – | W: | W: – – – | W: | ||
M: | M: | M: | M: | M: | M: | |
| N: | N: | N: | N: | N: | N: |
W:
N: – – – | N: | N: | N: – – – | N: | N: |
W: – – – | W:– – – | ||||
M: | M: | M: | M: | M: | |
N: | N: | N: | N: | N: | N: |
W:– – – W:
N:
AM | Normal | ||
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Narrow | |||
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FM | Normal | ||
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Narrow | |||
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23
