creating a sine wave with controlled frequency

[texasstate]

I am a student trying to work with LabVIEW. I am lost on my assignment. The following VI needs to be created.

a) create a Sine wave that you can control in frequencey and amplitude. Use the sampling frequency of the simulation equal to 200 Hz

b) obtain the power spectrum of this signal and change the sine wave frequency to 25 Hz.

c) increase sine wave frequency to 125 Hz

How do I create this VI, any help would be appreciated

[JÞB]

We tend to avoid doing homework.  but I think I can point you in the right direction.

Step 1 is to explore how LabVIEW helps you learn.  Great examples and help files do exist And you need to make use of them to get ahead with LabVIEW

Keep the context help on at all times while you learn.  Read the help if the context help is unclear

After you opened the Example finder you probably did a quick glance and found the signal and noise generation folder.  Play with some of these examples to get a backround of what's available then

Open C:\Program Files\National Instruments\LabVIEW 2009\examples\apps\demos.llb\Signal Generation and Processing.vi

You will still need to modify it to meet your spec (remeber to save it with a different name so the example is still OK)

Let me know if thats helpful and Good Luck!

[RavensFan]

Also, why did you post the same question again.  You already asked for this here.

[jyang72211]

Woh.  It seems to me that someone needs to do their hw.  I understand that you may not have much time (I was in school once), but I can assure you that you will not regret it if you spend some time learning LabVIEW now.  It will really help you.  I didn't have a chance to learn LabVIEW until I took my 2nd job after I got out from school.  How I wish that I had the chance to learn LabVIEW while in school (we used Matlab mainly).

You should be able to look at the example in LabVIEW to get your work down.  Let us know if you have stuck.

Yik