Icom IC-775DSP Instruction Manual page 36

31
4 FUNCTION OPERATIONS
Wi Filter selection
The filter switches select the IF passband width as
shown in the table at right below.
The filter selection is automatically memorized in
each mode.
| When an optional filter is installed, set the optional
filter setting in H-set mode. (p. 47) Optional filters
cannot be selected with default setting.
e Push [WIDE] to select the wider IF filters for the 9
MHz and 455 kHz IF filters.
- [WIDE] does not function in FM mode.
_ +The switch conditions are memorized in each mode.
e Push [NAR 9M] or [NAR 455k] to select the
narrower IF filter for the 9 MHz or 455 kHz IF filter,
respectively.
FILTER SWITCH CONDITION AND SELECTED
FILTERS
9M-NAR-455k
a Sa
-@+
Pang
eel"
WIDE 9M-NAR-455k
vis
WIDE 9M-NAR-455k
wis, wis,
vis vis
kg Noma?
E CW reverse mode
The CW-R (CW Reverse) mode receives CW sig-
nals with a reverse side CW carrier point like that of
LSB and USB modes. l
Use when interference signals are near the desired
signal and you want to change the interference tone.
e Push [CW/REV] once or twice to select CW or
CW-R mode.
- Check the interference tone.
FILTER SWITCH CONSTRUCTION
NAR 455k
FILTER SELECTION AND PASSBAND WIDTH
D OFF |6 kHz* (FL-102)
OFF|2.4 kHz OFF] 2.7 kHz
OFF
ON 11.9 kHz* (FL-223)| ON |1.9 kHz* (FL-222)
OFF] 2.4 kHz OFF|2.7 Wis |
cw,
RTTY OFF |500 Hz Së
OFF
ON | 250 Hz* (FL-101) | ON |250 Hz* (FL-53A)
OFF | Through
ON |6 kHz* (FL-102)
OFF |6 kHz* (FL-102)
ott |OFF| Through
ON |6 kHz* (FL-102)
* Optional filters
Passband width are shown at — 6 dB. The optional 250
Hz CW narrow filters may not pass RTTY signals.
e Receive audio tone response
1/2 oct. ++
Desired signal Interference
Desired signal Interference `
(600 Hz) (800 Hz) (600 Hz) (400 Hz)
CW mode (USB side) CW-R mode (LSB side)