Check out http://www.elisanet.fi/~d635415/webroot/SNR3/index.html for a

discussion of SNR measurement with a Spec An.

thanks

On Thu, Oct 2, 2008 at 5:28 PM, usu_vlsi wrote:

> Hi,

>

> I am kind of new to Signal Processing. I have two questions

>

> 1. I have a signal source, a in the lab, for eg. a 20kHz sine wave

> generator. I connect it to a spectrum analyzer. I can see the

> frequency spectrum of the signal. Can somebody explain to me how I can

> calculate the Signal to Noise ratio from the spectrum analyzer. I have

> no way of sampling the 20kHZ sine wave, the signal generator, and the

> spectrum analyzer are the only equipment I have (ofcourse I have a PC

> with Matlab on it)

>

> 2. I have the same 20kHz signal sampled at some frequency, say 8Mz. I

> have the sampled data in an array. I calculated FFT of some 1 million

> samples, after applying the blackman window function. Now how do I

> calculate the SNR of the signal?

>