Adding harmonics

[LeoLiu]

In the current waveform, I wanna add 3rd harmonices, then measure the level and show the waveform in the graph 

Can anyone help me slove this based on my vi. Thank you!

[James_McN]

Hi LeoLiu,

You should be able to use another signal simulation but pass it 3x the frequency.  Once you have done this you can add the two signals together to combine them.  I have attached an example to show this.  Does this show what you mean?

Regards,

[LeoLiu]

Hi james,

thank you for help me. When I added three harmonics, and I want show  each haromic level on the panel, which components do i need to use?

regards

[James_McN]

Hi Leoliu,

The harmonics will then appear as your peaks on FFTs.  If you need to extract them then search the pallettes for peak detector and this will return the peak values for you.

Regards,

[LeoLiu]

HI,James

What I mean is just show the each harmonic value in each block, and also have a componet to set the harmonics number, for example, I can set the highest harmonic is three, then I can see the 1st , 2nd, and 3rd harmonics on the graph and the level in block, I want see these automatically.

So can you help me to figure this out?