Hello,
I am using Labview 2019 and NI USB-6281.
I need to read the amplitude of a noisy amplitude modulated signal. 1k Signal carry modulated with 40Hz on amplitude.
Before measuring the real signal I am doing a simulation by generating a similar signal (but with less noise) with the output of the USB-6281 card. I read the signal with the same card.
I need to change the frequency and amplitude on the fly. That's why I use continuous signal output without regeneration.
If I generate a single Signal with the card and read it with the same card using extract single tone everything works fine. (output to input to output.vi)
If I generate an amplitude modulated signal and try to measure the amplitude of the signals used in the modulation it does not work well. (modulated input read tones).
Why is that? How can I do it?
Thanks.
