Icom IC-i7410 User Manual

59
5
FUNCTIONS FOR RECEIVE
■ Twin PBT operation
(Mode: SSB/CW/RTTY/AM )
To reject interference, PBT (Passband Tuning) elec-
tronically narrows the IF passband width by shifting the
IF frequency slightly outside of the IF filter passband.
The IC-7410 uses DSP for the PBT function. Moving
both [TWIN-PBT] controls shift the IF passband cen-
ter frequency both above and below the received fre-
quency.
➥ The LCD graphically shows the passband width and
frequency shift.
➥ Hold down [FILTER] for 1 second to display the “FIL”
screen (Filter). Current passband width and fre-
quency shift are displayed in the “FIL” screen.
➥ Hold down [PBT-CLR] for 1 second to set the IF
frequency to the center position.
 •The“dot”disappears.
The PBT is adjustable in 50 Hz steps in the SSB, CW
and RTTY modes, and 200 Hz in the AM mode.
In this time, the shift value changes in 25 Hz steps in
the SSB, CW and RTTY modes, and 100 Hz in the AM
mode.
• The [TWIN-PBT] controls should normally be set
to the center positions when there is no interfer-
ence. The PBT setting should be cleared.
•When the PBT is used, the audio tone may
change.
•ThecontrolsdonotfunctionintheFMmode.
•Whilerotatingthe[TWIN-PBT]controls,noisemay
occur. This comes from the DSP unit and does not
indicate an equipment malfunction.
• Pushing [PBT-CLR] displays the filter passband
width and shift value for 2 seconds on the function
display.
AGC TBW SCP
M1
S
+ 25
B
2.3K
Passband width and shift
value are displayed while
[TWIN PBT] is used.
Appears when pass-
band is shifted.
BW
SSB-2 2.4K
SHARP
FIL
S
0
B
2.4K
BW
SSB-2 2.4K
SHARP
FIL
S
+200
B
2.0K
• “FIL” screen (Filter) display
• While adjusting the PBT setting
Appears when the passband is shifted.
Shows the selected filter and passband width.
PBT OPERATION EXAMPLE
Both controls in the center
positions (or hold down
[PBT-CLR] for 1 second.)
Cutting the lower
passband edge
Cutting both lower and
higher passband edges
PBT2
PBT1
PBT2
PBT1
PBT2
PBT1
IF center frequency Interference Desired signal
Passband
Interference InterferenceDesired signal
Passband
[TWIN-PBT][PBT-CLR]
[FILTER]
• About Passband width and Shift value
on the screen
S
B
: Passband width
: Shift value
IF center
frequency
Passband’s
center frequency

Icom IC-i7410 Specifications

General

Brand	Icom
Model	IC-i7410
Category	Transceiver
Language	English