[SI-LIST] Re: AC coupling at both ends of the line
- From: "Andrew Ingraham" <a.ingraham@xxxxxxxx>
- To: <si-list@xxxxxxxxxxxxx>
- Date: Sun, 19 Mar 2006 12:03:29 -0500
> I am in the video industry and in digital video there is a test
> signal that is called the "Pathological signal". In it, the DC level
> is at the maximum allowable many of the SMPTE serial digital video
> standards.
Ethernet and FDDI have something called a "killer packet." It is supposed
to have a bit pattern that synchronizes with the data scrambler and causes a
larger low frequency component or DC shift, good for testing your magnetics
or, to a lesser degree, capacitive AC coupling.
Regards,
Andy
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