Signal generation from number of harmonics

[GerdW]

Hi ptavernise,

you don't need any shift register at all according to your task description!

Come è il tempo nel nord Italia? Io vado in vacanza ... 😄

[Bob_Schor]

A long time ago (before LabVIEW was invented), we were using what we called a "Sum of Sines" stimulus to deliver a pseudo-random (slow) waveform with a period of about 5 minutes that was composed of relatively-prime (and all odd) harmonics, like 7, 19, 39, ... .  This was "unpredictable", but could also be on-line averaged at the various harmonic frequencies.  We managed to do this without LabVIEW, without MatLab, indeed using "machine-language programming", so you should be able to do this (relatively simple) task yourself, even if you take a step backward, abandoning the rather more sophisticated and "programmer-friendly" tools that LabVIEW provides, and, instead, think of how you would do this with a pencil, paper, a calculator, and a table of the sine function.

Bob Schor

[ptavernise2345]

Mi sa che la vacanza la dovrai rimandare perchè piove a firenze. Come posso fare dunque non ho capito.

[GerdW]

Hi ptavernise,

simple autoindexing:

Spoiler

Immagino che sia presto in Ravenna ...

[ptavernise2345]

Hi,

instead if i'd like to see the sum of i-th harmonics where i stands for the number of harmonics, which can be changed by front panel?

How can i do?

[GerdW]

Hi,

when you want to display a sum you need to add up the waveforms in the loop. Use a shift register...

[ptavernise2345]

I've used shift register.Why it dosn't work?

[ptavernise2345]

Precisely, i'd like to see on the output waveform the signal of amplitude plotted in this picture.How can i modify the VI?

[ptavernise2345]

Please i need your help!!!Answer me!!!

[ptavernise2345]

Could someone help me?