> > You need to be able to *capture* the data in real time, in order to > > do a single sweep mode, for non-periodic signals. The processing and > > display of that data don't have to be real time. > > Yes, that is true for some applications, but unless this is a real time > spectrum analyzer ($$$$) -- which is useful for some applications such > as looking for noise and intermittent distortion -- you are going to be > working with a stable periodic wave form.
That was in reply to: >>> To be more specific, >>> a digital oscilloscope displays a periodic signal on the screen and the >>> refresh scans rather slowly from left to right. Single sweep mode is a very useful, often essential, feature for an oscilloscope. I'm not sure how valuable a similar single sweep mode would be for a spectrum analyzer, but once you can capture the data for the 'scope, you could run the same data through a FFT, so the SA gets the feature for free. Note that I'm *not* suggesting that this needs to continuously capture and display in real time. Take the output of the A/D and store it in memory, in real time. When you're done collecting samples, the CPU starts crunching the data, not in real time. Sounds simple, am I missing something? _______________________________________________ Open-graphics mailing list [email protected] http://lists.duskglow.com/mailman/listinfo/open-graphics List service provided by Duskglow Consulting, LLC (www.duskglow.com)
