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Posted by Albert Manfredi on July 6, 2007, 4:03 pm
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> Can someone help me find a specification for the pulse shape
> specification for an ethernet pulse. What I am interested in is the
> limits for rise and fall times.
>
> I have searched google and can't find anything specific about the
> pulse shape.
>
> Many thanks in advance
That depends on the PMD layer you are looking for. The source is the
IEEE 802.3 standard, which you can find at:
http://standards.ieee.org/getieee802/portfolio.html
Enter the info they ask for, then search the part of the standard you
need.
For example, if you're looking for the 1000BASE-T, you need to look at
802.3 Clause 40, which is in Section 3. Waveforms and test fixtures for
100BASE-T are described in 40.6.
The info is specific to each PMD, however.
Bert
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