If Filter Selection - Icom IC-756PROIII Instruction Manual

5
FUNCTION FOR RECEIVE
■ 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.
• IF filter selection
q Select the desired mode.
w For RTTY mode, turn OFF the RTTY filter by push-
ing [RTTY FIL].
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.
• Filter passband width setting
(SSB, CW and 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 by push-
ing [RTTY FIL].
e Push [FILTER] for 1 sec. to enter filter set mode.
r Push [FILTER] several times to select the desired
IF filter.
t While pushing [(F-1)BW], rotate the tuning dial to
set the desired passband width.
• The passband width can be set within the range as
shown right table.
• Push [(F-3)DEF] for 1 sec. to select the default value.
y Repeat steps r to t if desired.
u Push [EXIT/SET] to exit the filter set mode screen.
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.
61
[FILTER]
The filter selection is automatically memorized in
each mode.
The PBT shift frequencies are automatically memo-
rized in each filter.
Passband Selected
width
ANT ANT
BW BW 2.4k 2.4k SFT SFT 0
1
TX T X VFO VFO U S B U S B
qr.qot.pp
METER METER
Po Po
1 14.100.00 14.100.00
P.AMP P.AMP
1
VFO VFO USB USB
qr.wpt.pp
ATT ATT
OFF OFF
1 14.100.00 14.100.00
AGC AGC
MID MID
VOX VOX
OFF OFF
3 0 0 3 0 0 1 5 0 0 1 5 0 0
COMP COMP
OFF OFF
WIDE WIDE
BW BW
Mode Filter Default
FIL1 3.0 kHz
SSB FIL2 2.4 kHz
FIL3 1.8 kHz
FIL1 1.2 kHz
SSB-D
FIL2 500 Hz
CW
FIL3 250 Hz
FIL1 2.4 kHz
RTTY FIL2 500 Hz
FIL3 250 Hz
FIL1 9.0 kHz
AM
FIL2 6.0 kHz
FIL3 3.0 kHz
FIL1 15 kHz
FM* FIL2 10 kHz
FIL3 7.0 kHz
*: When the IF filter is selected FIL2 or FIL3 in the FM
mode operation, the Tx IF filter's passband width is
fixed narrow selection (2.5 kHz).
IF filter
qw:pp
12:00
FIL2 FIL2
USB USB
FIL2 FIL2
USB USB
FILTER FILTER
SSB SSB
FI FIL 1 3 . 0 k 3 . 0 k
2 7 0 0 2 7 0 0
FI FIL 2 2 . 4 K 2 . 4 K
PBT1 PBT1
FIL 3 FI 1 . 8 K 1 . 8 K
PBT2 PBT2
DEF DEF
Range (Steps)
50–500 Hz (50 Hz)/
600–3.6 kHz (100 Hz)
50–500 Hz (50 Hz)/
600–3.6 kHz (100 Hz)
50–500 Hz (50 Hz)/
600–2.7 kHz (100 Hz)
Fixed
Fixed