Waterfall and tile data #3

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Here is my data:
Waterfall {streamId=0x42000000, bandwidth=0.016, centerFreq=18.0780006, size=1500,800}

WaterfallTile{FirstPixelFreq=18058301, BinBandwidth=11.0, LineDurationMS=80, _width=3360, _height=1, Timecode=5, AutoBlackLevel=11570, DateTime=Tue Jun 16 10:35:17 EDT 2015}


Waterfall {streamId=0x42000000, bandwidth=0.016, centerFreq=18.0780006, size=1500,800}

WaterfallTile{FirstPixelFreq=18058301, BinBandwidth=11.0, LineDurationMS=80, _width=3360, _height=1, Timecode=6, AutoBlackLevel=11570, DateTime=Tue Jun 16 10:35:17 EDT 2015}


Waterfall {streamId=0x42000000, bandwidth=0.016, centerFreq=18.0780006, size=1500,800}

WaterfallTile{FirstPixelFreq=18068150, BinBandwidth=5.0, LineDurationMS=80, _width=3360, _height=1, Timecode=7, AutoBlackLevel=12070, DateTime=Tue Jun 16 10:35:17 EDT 2015}


Waterfall {streamId=0x42000000, bandwidth=0.016, centerFreq=18.0780006, size=1500,800}

WaterfallTile{FirstPixelFreq=18068150, BinBandwidth=5.0, LineDurationMS=80, _width=3360, _height=1, Timecode=8, AutoBlackLevel=12070, DateTime=Tue Jun 16 10:35:18 EDT 2015}

Question 3) Autoblack. Would you please elaborate on what autoblack means? Note also, that in that sample of data the value of auto black changes from 11570 to 12070. Yesterday I was also getting values of zero, that was in the evening on 17m vs. morning.

Spoiler alert - stream of conciousness follows:

I am thinking the way to address the model space vs. device space is to form a viewport over the model space which will float both vertically as well as horizontally. That also solves the scrolling issue. This is in reference to coordinate space mapping. Is this how you guys do it?
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Walt - KZ1F

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Posted 3 years ago

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Stu Phillips - K6TU, Elmer

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Please see my post:

https://community.flexradio.com/flexradio/topics/generating-a-pan-adaptor-and-waterfall-display

AutoBlackLevel is described in that post in some detail.

yes, the AutoBlackLevel can and does change - it depends on the average low noise level across all the bins.

Stu K6TU

PS: and don't forget the like...
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Jon - KF2E

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I'm going to like this even though I don't completely understand it. I think it is great that Stu donates his time to help developers here on the forum.

Jon...kf2e