is a resolution of 0,001 UI good to measure clock jitter ?

Bernhard · 8th December 2008, 11:20 AM

is a resolution of 0,001 UI good to measure clock jitter ?

For a 10 MHz clock this is a resolution of 100pS ?

For 44,1 kHz

oshifis · 8th December 2008, 02:01 PM

0.001 UI is -60 dB peak-to-peak jitter phase noise, related to the fundamental frequency. We need half of 1/65536 UI, that is 0.75 x 10-6 UI in telecom terms. UI is for Unit Interval, referring to the data clock period. That would be the jitter causing 1/2 LSB error. And we need it in the full audio band, so a jitter spectrum is more informative than such cumulative data.

8th December 2008, 11:20 AM	#1
Bernhard diyAudio Member Join Date: Apr 2002 Location: Munich	is a resolution of 0,001 UI good to measure clock jitter ? is a resolution of 0,001 UI good to measure clock jitter ? For a 10 MHz clock this is a resolution of 100pS ? For 44,1 kHz

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8th December 2008, 02:01 PM	#2
oshifis diyAudio Member Join Date: Mar 2004 Location: Budapest, Hungary	0.001 UI is -60 dB peak-to-peak jitter phase noise, related to the fundamental frequency. We need half of 1/65536 UI, that is 0.75 x 10-6 UI in telecom terms. UI is for Unit Interval, referring to the data clock period. That would be the jitter causing 1/2 LSB error. And we need it in the full audio band, so a jitter spectrum is more informative than such cumulative data.

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