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Page 32 FT-450D OPERATION MANUAL
“DNR” Indicator
[
DSP
]
button
[
DSP/SEL
]
knob
DNR
(
INTERFERENCE REJECTION “SIGNALS WITHIN 3 KHZ
)
The Digital Noise Reduction (DNR) system is designed to reduce the level of random noise found on the HF and
50 MHz bands, and it is especially effective during SSB operation. Any of eleven different noise-reduction algo-
rithms can be selected. Each of these algorithms was created for dealing with a different noise profile, and you
will want to experiment with the DNR system to find the best setting according to the noise currently being
experienced.
1. Press the
[
DSP
]
button several times to set the
>” icon to the “DNR” indicator of the DSP Graphic
Display on the display.
2. Press the
[
DSP/SEL
]
knob to engage the Digital
Noise Reduction system.
3. Rotate the
[
DSP/SEL
]
knob to select the setting
that most effectively reduces the noise level.
You may observe the effectiveness of the Digital
Noise Reduction system in the “DNR” indicator
of the DSP Graphic Display on the display.
4. To disable the Digital Noise Reduction system,
press the
[
DSP/SEL
]
button again. The graph ef-
fectively disappears from the “DNR” indicator of
the DSP Graphic Display on the display confirm-
ing that the Digital Noise Reduction system is no
longer operating.
CONVENIENCE FEATURES
34


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