crystal oscillator’s accuracy (ps and dBc)

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Hi All
Some crystal oscillator’s accuracy is expressed in unit of ps (time
domain) and some others in dBc (frequency domain).
How can I convert these to each other?
Best regards

 

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It sounds like you're talking about phase noise in dBc, or jitter in ps.  Or
are you interested in frequency accuracy?

Yes. The phase noise. What is the relation between them?