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  3. RMS Jitter From Phase Noise

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RMS Jitter From Phase Noise

strigois
strigois over 10 years ago

I am trying to convert Phase Noise to RMS Jitter(radians), but I'm having trouble following the units through the process.

To get RMS Jitter, in radians, from Phase Noise you must integrate the Phase Noise.  What are the units of integrated Phase Noise and how do they cancel.  The equation I am currently using for this is A = Phase Noise (L(f)) + 10*log10(frequency2- frequency1) and to generate the RMS Jitter value in radians I am using sqrt(2*10^(A/10)).

Additionally, what are the units for 10*log10(frequency2- frequency1) and if L(f) is the ratio of Pcarrier and Poffset in dBm, and that has units of dBc/Hz, what would be the units if it were converted to a linear value.

Thank you for any insight you might have on these questions.

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  • strigois
    strigois over 10 years ago
    Follow up question. Since L(f) is the ratio of Poffset and Pcarrier(L(f) = Po/Pc), it follows that if you increase Pcarrier you decrease L(f), which in turn decreases Jitter. If this is true, then one could remove Jitter by increasing the power of the carrier. Is this true?
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  • strigois
    strigois over 10 years ago
    Follow up question. Since L(f) is the ratio of Poffset and Pcarrier(L(f) = Po/Pc), it follows that if you increase Pcarrier you decrease L(f), which in turn decreases Jitter. If this is true, then one could remove Jitter by increasing the power of the carrier. Is this true?
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