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What does rad²/Hz unit for VCO phase noise mean?

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STOIKOV

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For a VCO I measured in lab -30dBrad²/Hz of phase noise. Most of the examples I've seen express the phase noise in units of dBc/Hz, which I understand is the ratio of noise with respect of the carrier at a frequency offset.

What does rad²/Hz mean ??

regards !
 

Re: VCO phase noise

Sounds like you measured integrated jitter instead. That's an unusual unit, what did you use to measure it?

Dave
 

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    STOIKOV

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Re: VCO phase noise

I used a vector signal analyzer Agilent 89410A. Want to measure the phase noise but the units rad²/Hz confuse me. Someone has used a similar instrument to obtain phase noise in dBc/Hz units ??
 

Re: VCO phase noise

Play around with the marker menu. That is where Agilent likes to hide those sorts of things.

Dave
 

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