Icom IC-7300 - Page 33

4
RECEIVING AND TRANSMITTING
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4-3
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and des
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electronically narrows the IF passband width by
shifting the IF frequency to slightly outside of the IF
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You can narrow the IF passband width by rotating
both
TWIN PBT
CLR
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the opposite direction from each other.
LYou can see the nearby signal using the Spectrum Scope
(Section 5).
1. Rotate
TWIN PBT
CLR
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2. Touch the Filter icon for 1 second to display the
current passband width and shift frequency.
• Opens the FILTER screen.
Passband
width
Shift
value
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3. To close the FILTER screen, push
EXIT
.
NOTE While rotating
TWIN PBT
CLR
, you may hear noise.
This comes from the DSP unit and does not indicate an
equipment malfunction.
PBT2
PBT1
PBT2
PBT1
PBT2
PBT1
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Cutting
lower passband
Cutting both higher and
lower passbands
IF center frequency Interference Desired
signal
Passband
Passband
Interference Desired
signal
Interference
IF center frequency
Passband center frequency
SFT Shift value
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Passband width
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InformationL
• Match both the
TWIN PBT
CLR
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RXWHU3%7¿OWHUVEHIRUHRSHUDWLQJWKH7ZLQ3%7
• Rejects interference of both higher and lower
passbands.
• If you rotate the control too much, the received
audio may not be heard because the passband
width is too narrow.
• Displays the passband width and shift value.
• A dot is displayed above the passband width when
you rotate
TWIN PBT
CLR
.
• Hold down
TWIN PBT
CLR
for 1 second to clear the
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• 7KH3%7LVDGMXVWDEOHLQ+]VWHSVLQWKH66%
CW, and RTTY modes, and 200 H in the AM
mode. In this case, the center shift value changes
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
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and 100 H in the AM mode.
• Rotating both the inner and outer controls to the
same position shifts the IF left or right.