Horizontal lines in waterfall

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  • Updated 6 months ago
Any idea what these horizontal lines in the waterfall are? I turned up the waterfall gain so they are more visible.

I'm having an issue with deformed FT8 signals and wonder if these lines are related.

Photo of Pat N6PAT


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Posted 6 months ago

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Photo of Bill -VA3WTB

Bill -VA3WTB

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I think It's just changes in the noise floor, any movement will creat a line.
Photo of K3DCW


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Looks like lightning noise to me: very prevalent this time of year.
Photo of Roy - W5TKZ

Roy - W5TKZ

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Pat, the horizontal lines you see are created by several things. Lightning, sparking switches to just list a couple of them.

Deformed FT-8 signals are usually seen when the transmitting station is running high power or is close to your station. Normally these FT-8 signals present no decode problems.

Roy - W5TKZ
Photo of JohnSweeney


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Broadband noise source.   I have the same lines whenever my Ethernet powerline adaptors are on.