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Is the eyediagram OK for the system applications? (Read 3534 times)

dandelion

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Is the eyediagram OK for the system applications?
Jul 26^th, 2007, 12:32am

Hi,
Would you pls. take a look at the attached three eyediagrams?

Eyediagram1 is a normal eyediagram. But eyediagram2 and diagram3 shows the crosspoint of the eyediangram shifted from midpoint seriously, especially for the eyedianrgram3, the crosspoint even disappeared. I checked my design spec, for the rise/fall time it is OK. And for the another spec of PWD(pulse waveform distortion), although the crosspoint of the eyediangram2&3 shifted seriously, they also meet the PWD spec because of the sharp rise/fall edge.

I wonder if the eyediagram2&3 is indeed OK for the system even they meet the design spec?

Thanks in advance
Dandelion

Eyediagrams.pdf

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ywguo Community Fellow Offline Posts: 943 Shanghai, PRC	Re: Is the eyediagram OK for the system applicatio Reply #1 - Jul 26^th, 2007, 2:49am Hi, What is it in eyediagram 3? The eyediagram 2 looks very bad. Is it 010101... ? Generally a mask is defined for the serial data communication like USB, IEEE 1394 .... You should check whether the waveform violate the mask. Yawei
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dandelion Community Member Offline Posts: 98	Re: Is the eyediagram OK for the system applicatio Reply #2 - Jul 27^th, 2007, 10:11pm Is there any more comments,pls.?
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