On Mon, Oct 5, 2015 at 10:44 PM, Jon Elson <[email protected]> wrote: > On 10/05/2015 10:16 AM, Mark Wendt wrote: >> >> Well, it does say the "analogue bandwidth" is 2 MHz. It could be >> using sub-sampling to acheive that bandwidth. >> >> > Even if the analog BW is 2 MHz, if you feed in a 2 MHz > signal with a 2.5 MSa/sec sampling > rate, you are bound to get a seriously aliased signal. it > will probably look like a perfectly clean sine wave at 500 KHz. > > Lovely! > > Jon Yeah, I Nyquist pokes his head in there occasioinally. But there is a way to under sample through clever manipulations of the ADC and still come our with a not so badly aliased signal.
Here's a little article talking about doing that: http://www.bitscope.com/design/hardware/convertor/?p=bandwidth Mark -- One Man, One Machine, One Computer! <VBSEG> ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
