I have a question about the PN function, available in the Calculator.
Is an output phase noise spectrum is a signle sideband or a double sideband spectrum?
To avoid any confusions, I mean the 'double sideband' by a spectrum 3dB more than the 'single sideband' in magnitude.
Thanks for any comment or answers.
I suspect it's single sideband, but I'm not sure (I've never used it). It's for analysing transient results, and is defined this way:
PN Calculates the transient phase noise of the input waveforms indecibels (dBc/Hz). Phase noise is defined as the power spectraldensity of the absolute jitter of an input waveform.
You tagged this post with lots of terms like pss, pnoise etc - so you would not use this function if you're using pnoise. You'd use the pn() or phaseNoise() functions, and these will give you the single sideband phase noise (strictly the output noise in dBc if using "sources"). You'd be better off using "modulated" pnoise and then you can get either from the direct plot form.
In reply to Andrew Beckett:
Thank you for the reply.
What I try to do is to make a transient phase noise model of a VCO in veriloga. In order to verify my veriloga model by comparison, I need to run both a pss/pnoise analysis in transistor level and a transient analysis in behavioral level. Then I compare two spectrums from the pnoise and the transient analyses. That is why I care about the PN function as much as other pnoise functions.
I appreciate your help again, and if any futher comment or suggestion possible, please let me know.
In reply to smlogan:
The question is about the PN function not the pn function. They are different. The definition you've given is from the PN function (just trying to avoid confusion)
In reply to Kristopher Kshonze:
Because you posted on the end of an old thread (which the forum guidelines tell you not to do), your question got overlooked (which is why the guidelines tell you not to do this). If you still need an answer to this, I suggest you give some details as to what the netlist statement for the sine source looked line, and what the arguments to the PN function you used were.