Page 59FT-2000D OPERATING MANUAL
DIGITAL NOISE REDUCTION
(
DNR
)
OPERATION
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. By rotating the
[
DNR
]
knob, any of sixteen different noise-
reduction algorithms 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 experi-
enced.
I
NTERFERENCE
R
EJECTION
(
S
IGNALS
WITHIN
3
KHZ
)
1. Press the
[
DNR
]
button. The “ ” icon will appear
in the display, confirming that the DNR system is en-
gaged.
2. Rotate the
[
DNR
]
knob to select the setting that most
effectively reduces the noise level.
3. To disable the DNR system, press the
[
DNR
]
button
once more. The “ ” icon will turn off, confirming
that the DNR system is not active.
ADVICE:
The Digital Noise Reduction affects the Main band
(VFO-A) only.
The Sub band (VFO-B) frequency display will show
the current noise reduction parameter for 3 seconds
whenever the
[
DNR
]
knob is turned.
You may disable this feature (displaying the current
noise reduction parameter) via Menu item “015 LVL
IND.” See page 117 for details.
[
DNR
]
Knob
[
DNR
]
Button
NOTCH Indicator
DIGITAL NOTCH FILTER
(
DNF
)
OPERATION
The Digital Notch Filter (DNF) is an effective beat-cancelling filter that can null out a number of interfering beat notes
inside the receiver passband. Because this is an Auto-Notch feature, there is no adjustment knob associated with this filter.
ADVICE:
If a very strong interfering carrier is encountered, we recommend you first use the IF Notch filter, as it is the most effective
notching tool in the receiver section.
1. Press the
[
DNF
]
button. The “ ” icon will
appear in the display, confirming that the DNF
system is engaged.
2. To cancel DNF operation, press the
[
DNF
]
button once
more. The “ ” icon will turn off, confirming that
the Digital Notch Filter is no longer in operation.
ADVICE:
The Digital Notch Filter affects the Main (VFO-A) band
only.
[
DNF
]
Button
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