signal to noise spectrum analyzer

Hi,

How to measure the SNR on spectrum analyzer?

I have a signal source. 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.

Thanks,

SNR of what?
& I guess you need to have signal generator & spectrum analyser in same box I mean synchronized, then only you can measure noise figure on SA & then you can calculate SNR.

Hi Abhishek,
My source is a device working on 2.4GHz, I have attached an antenna to SA -
I can see the frequency spectrum of the signal - with default parameters (i.e. RBW, Attenuation, span, sweet time etc).
how can i figure out the SNR from that signal?
& how can i change the SNR on SA?

Thanks

NF= SNR(input)/SNR(output)

Hi Abhishek,

Thanks, I know this but how do I measure on SA? Any idea ....
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Noise Factor (F) =
Total equivalent input noise power SNR(in) /
Input Noise power dur to source only SNR(out)

where

SNR(in) = Received Signal Power / Received Noise Power
and
SNR(out) = Output Signal Power / Output Noise Power

Thus,

Noise Factor (F) = SNR(in)/SNR(out)
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