Re: Strategies to save/display low sample-rate data

On Wed, Apr 10, 2024 at 10:38:14AM -0400, John Ackermann N8UR wrote:

> I want to make waterfall displays of narrow bandwidth signals -- say +/- 20
> Hz with FFT depth of 1024. Decimating to ~80 samples/second and feeding
> that into a 1024 bin FFT is... not fast.

Both the decimation and 80 size 1024 FFTs per second should be peanuts
for any modern PC...

And of course you don't need to do the FFT again for every sample,
it just generates a lot of redundant data.

Ciao,

--
FA