how can i generate only one period of sine wave

[yhpig]

how can i generate only one period of sine wave ?

[muks]

You can use sine wave.vi or simulate signal vi

[muks]

[Dennis_Knutson]

Just specifying the frequency does not allow you to generate a single period. Just look what happens if you ask for a 2Hz signal. You need also specify the number of samples and sample rate.

[NIquist]

You can manipulate the sampling info with the desired frequency in several ways to keep just 1 period.  See pic for a simple example.

EDIT:  You have to have the sampling frequency (Fs) equal to the number of samples (#s)

...  Nevermind, tbob beat me to it.

[tbob]

Dennis is correct.  The reason Muks example seemed to work is because the default sample rate is 1000 and he used a frequency of 1Hz.  To get one cycle at any frequency, multiply the frequency by 1000 and set the sample rate to this number.  There is a cluster on the bottom of the Sine Wave funtion that allows one to set this parameter.

[Benje]

Hi,

I'm using this method that you discribe for generating a sine wave with one cycle.

Then I send this sine pulse to my soundcard. Works perfectly for a low frequency.

But I need a frequency of 10kHz and then this VI doesn't work.

But normally my soundcard works till 30 a 35kHz (For example when I make a continous sine wave)

Does anyone has a solution for this?

Thanks!

jelle

[John_P1]

One cycle of a 10 kHz sine wave is only 100 us in duration.  I'm no biologist (or is it electrophysiologist?), nor do I work much with sound in general, but I did read wikipedia's Loudness article--I wouldn't expect the human ear to be able to pick this up.  

Best Regards,

[Benje]

Hello,

That's no problem. I don't have to hear it.

I send it with my soundcard to a pc oscilloscope an i just want to see it on my pc oscilloscope.

Problem is that the VI blocks if I use high frequencies...

Any labview solutions?

kind regards

[Yamaeda]

If you generate the signal as an array you should be able to play it with play sound.