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The Designer's Guide Community Forum › Measurements › Phase Noise and Jitter Measurements › plotting L(Δf ) curve
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plotting L(Δf ) curve (Read 3894 times)
Razer
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plotting L(Δf ) curve
Oct 27th, 2004, 8:12pm  
Hi,
    To plot L(Δf ) curve of an oscillator, I use this equation:

L(Δf ) = 10^^(Phasenoise( Δf )/10)

Where Phasenoise(L(Δf )) is in dbc/Hz & is got by
the "phase noise" plot of spectrerf's PNOISE simulation for oscillator.
Is this correct or should I multiply the RHS by a factor of 2?

Thanks
Razer
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Andrew Beckett
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Re: plotting L(Δf ) curve
Reply #1 - Nov 3rd, 2004, 1:33am  
Your posting came out as gobbledegook. Can you resend it such that it is meaningful?

Thanks,

Andrew.
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Frank Wiedmann
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Re: plotting L(Δf ) curve
Reply #2 - Nov 3rd, 2004, 4:46am  
The Δ is supposed to be a Delta, see http://www.w3.org/TR/REC-html40/sgml/entities.html.
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Razer
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Re: plotting L(Δf ) curve
Reply #3 - Nov 3rd, 2004, 5:49pm  
oops, (Δf ) is "delta f" , The offset frequency.

Thanks
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