What update rate do I need?

[yusof]

Hi,

I want to generate 10Hz analog signal.

What the recommended update rate and number of samples for such a signal?

[Stefo]

to keep shape you should use sampling at least 10 times the frequency of the signal. Means if you generate 10Hz sine wave, you need at lease 100S/s update. Higher is better. You can use 1000S/s for example. In case of how many samples you should use, then you should prepare one period of the signal. This means for 1000S/s you should prepare 100 samples representing one full period of your signal and use regeneration mode (default).

regards,

stefo

[yusof]

Okey thanks but could you please explain to me how do you calculate the number of required samples if I want to generate 10Hz sine wave with update rate 1000S/s?

Yeah I know you had explained briefly in previous post but I still could not understand yet this fundamental issue.

[Dennis_Knutson · Accepted solution]

It is really simple arithmetic. Divide the sample rate by the frequency to get 100 samples for a single cycle.