Re: [Discuss-gnuradio] gr-fosphor : New RTSA-like visualization block for GNURadio using GPU acceleration

[Darren Long]

On 27/10/13 21:02, Alexandru Csete wrote:
> On Sun, Oct 27, 2013 at 8:45 PM, Darren Long <address@hidden> wrote:
>
>
> I'd like to be able to use this with my KX-3 perhaps as slowly as 48kHz :)
> Daren,
>
> Do what exactly?
> The purpose with gr-fosphor is to visualize more data that what is
> possible with snapshot-type FFT. This ensures that no data is lost
> between to screen updates. But for such low bandwidth you can just
> plot everything without loosing any information. You could do some
> history buffering and averaging to get the look and feel of gr-fosphor
> but it will not give you the same real time effect. It will be the
> plain old "FFT averaging" concept that we know  and you don't even
> need a GPU to do that.
>
> Alex

Well, the fosphor waterfall itself isn't of much use at high rates as 
the signals just whizz of the screen before you get a chance to look at 
them.  The magic, as you point out, is in the fosphor FFT plot, which is 
awesome!  All I would like is for the waterfall to not be jerky at 
moderate sample rates. I find that a waterfall presents a better target 
than an FFT plot for a click-to-tune function, but a jerky one is not good.

Cheers,

Darren