Plot Phase Noise Measurement

Hi,

I want to plot the Phase Noise Measurement. The measurement is got by a Electrical Spectrum Analyzer, which gives a CSV file with power and frequency values. I want to use the Leeson phase noise formula(is there any method?): L(f)=Pn(dBm/Hz)-Ps(dBm)-10log(RBW)

I am not sure if my code is correct. By the way, I would like to get a graph like what I attach. x-axis is frequency offset, that is, the frequency between fo and fm. y-axis is phse noise.

The span frequency is usually 2MHz. My graph starts at 2*10^3 Hz and it should start at 10^0 Hz.....

I attach MatLab file and csv file.

Thank you

[Vineeth Nair]

Hi, Can you elaborate what do the terms in this given Leeson phase noise formula, stand for? L(f)=Pn(dBm/Hz)-Ps(dBm)-10log(RBW)

[Luis Vallejo Castro]

Hi,

I upload the formulas. Ps(dBm) is the carrier power while Pn(dBm/Hz) is noise power. I substract 10log(RBW) to normalized the measurement.

I get a measurement like the photo. It usually has 2MHz Span, so the offset could be between 0 and 1MHz. The measured file is csv with a colum and row (frequency and power). I find out the Ps and I figure out L(f) as the formula, that is, shifting to the right.

The problem is that x-asis starts at 2*10^3 Hz in my graph and it should start at 10^1 Hz

[naheeda reshi]

I'm trying to plot power spectrum and phase noise using an inbuilt function

PNMeasure = phaseNoiseMeasure(Xin,Yin,RBW,FrOffset,PlotOption,tag,Name,Value)

But, I'm not able to get the plot. Any help would be appreciated.