I Selección Del Filtro If - Icom IC-7400 Manual De Instruccion

5
FUNCTIONS FOR RECEIVE
I IF filter selection
The transceiver has 3 passband width IF filters for each mode.
For SSB and CW modes, the passband width can be set within 50 to 3600 Hz
in 50 or 100 Hz steps. A total of 41 passband widths are available.
For RTTY mode, the passband width can be set within 50 to 2700 Hz in 50 or
100 Hz steps. A total of 32 passband widths are available.
For AM and FM modes, the passband width is fixed and 3 passband widths
are available independently.
The filter selection is automatically memorized in each mode.
The PBT shift frequencies are automatically memorized in each filter.
D D IF filter selection
q Select the desired mode.
w For RTTY mode, turn OFF the RTTY filter.
e Push [FILTER] several times to select the IF filter 1, 2 or 3.
• The selected passband width and filter number is dis-
played in the LCD.
By pushing [PBTC], the set filter passband width, "B," and shifting value
"S" is indicated.
D D Filter passband width setting
RTTY mode only)
q Select SSB, CW or RTTY mode.
• Passband widths for AM and FM modes are fixed and
cannot be set.
w For RTTY mode, turn OFF the RTTY filter.
e Push [FILTER] for 1 sec. to enter filter set mode.
r Push [FILTER] several times to select the desired IF filter number.
t While pushing [F1 BW], rotate the tuning dial to set the desired passband
width.
• In SSB and CW modes, the passband width can be set
within the following range.
50 to 500 Hz
600 to 3600 Hz
• In RTTY mode, the passband width can be set within the
following range.
50 to 500 Hz
600 to 2700 Hz
• Push [F-3] for 1 sec. to select the default value.
y Repeat steps r to t if desired.
u Push [MENU] to exit the filter set mode.
The PBT shift frequencies are cleared when the passband width is
changed.
This filter set mode screen graphically displays the PBT shift frequencies
and CW pitch operations.
49
(SSB, CW and
50 Hz steps
100 Hz steps
50 Hz steps
100 Hz steps
A G C D U P C M P T B W S C P
The selected filter width is indicated
for approx. 1 sec. when [FILTER] is
pushed.
• Filter set mode indication
B W
Shows the selected filter and passband width.
• Indication while setting
B W
Reverses
While pushing [F1 BW], rotate the tuning dial to set
passband width.
[FILTER]
Filter selection
Appears