Post Noise Blanker Display and Averaging in SSDR

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Right now, the the spectrum display does not reflect any benefit derived from the noise blanker. I vaguely remember talk about showing the display post noise blanker as is done in PSDR. What are the plans for that? Also, averaging may be one of those small additions that Steve mentioned; but, where does it fall in the timeline?
Thanks
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Tim K8XS

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Posted 5 years ago

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Steve - N5AC, VP Engineering / CTO

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Official Response
Noise blanker has initially been implemented in the slice receiver signal chain. Longer term we would like to implement the noise blanker much further up the signal chain as you suggest so that it impacts both the display and the slice audio at the same time.

How would you feel about a noise blanker originating at the panadapter level -- in other words we would remove the control from the slice receiver and it would be on the panadapter and any slices on that panadapter would be controlled by a control on the panadapter itself?

Independently, we'll do some more display averaging options.

Steve
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Steve - N5AC, VP Engineering / CTO

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As we've mentioned in several places, we are in the process of working on a new noise blanker.  The new noise blanker is still in work and I can't yet say when it will be ready.  But, we have been doing internal demos that show it removing noise from both the panadapter and the slice receivers.  We are lucky (unlucky) enough to have a pole-pig near us that is continually arcing.  In the demos I've seen, the spectrum display almost completely cleans up and there is a reduction in noise of 6-15dB and there are only the faintest remnants of the noise present.  The one noise blanker does this for all slices on all bands.  I've watched the demo shown to several people internally and it's fun to watch jaws literally drop.

The way the noise blanker is currently designed, there will be no panadapter/waterfall data with noise available once it is turned on -- it's just going to remove the noise from the panadapters/waterfalls and slices involved.

We're still talking about a more advanced diversity algorithm and some things related to this, but they are not being worked on at the moment.