@santo_13 wrote:
@JayWW wrote:
@Henrik_Volkers wrote:
@santo_13 wrote:
@JayWW wrote:
@Henrik_Volkers wrote:
you can try a external low pass filter..
What THD you need?
THD isn't super critical. That being said, I am trying to generate function generator caliber signals. What would implementing a low pass filter accomplish?
Thanks!
very clean sine wave has very low THD, so, yes, THD is important
I have to agree 100% to santo_13 , what do you mean with "generate function generator caliber signals"?
calibration? synchronisation?
What do you want to do?
THD isn't hyper-critical for my application. I just need a decent sinusoidal waveform, at 80 kHz, and a specific amplitude, for two seconds on, and 8 seconds off.
In that case, then a 250ksps sample rate should give you a "decent" sinewave at 80kHz as it already satisfies the Nyquist criteria.
Unfortunately, sampling at only double the desired frequency, or in this case, just over 3x, isn't enough to get a decent sine wave. Please see the attached image. I have other methods of generating the desired frequencies that don't involve using the USB-6453. I just figured, if I could do it all with one device, it would be a cleaner install.
