FLEX-6000 Signature Series - SmartSDR for Windows Software User’s Guide
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spectrum, as is the case with WNB. The NB algorithm complements the WNB algorithm and may be
used with or without WNB. It may more effective than WNB, less effective or have no effect on
specific examples of impulse noise.
The Slice Specific Noise Blanker may be turned on or off and adjusted for each Slice Receiver.
13.5 NOISE REDUCTION (NR)
The Noise Reduction processor (NR) will reduce random (“white”) noise making signals more
readable which are buried in the noise. It is best to adjust the AGC threshold first, and then enable
the Noise Reduction.
The Noise Reduction algorithm uses a correlation based adaptive filter. Noise Reduction increases
correlation between input and output with the assumption that noise is uncorrelated and should be
canceled out. The threshold adjustment controls the adaptation rate of the filter, so in the case of
Noise Reduction, there will be very little audible change while adjusting the threshold unless the
noise is changing rapidly or dramatically. The most aggressive settings of Noise Reduction increase
the signal to noise ratio but will tend to “color” the signal. The slider should be set for the optimal
tradeoff between signal to noise ratio and minimal distortion of the desired signal.