RE: [SI-LIST] : Eye pattern with differencial signals.

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From: Ingraham, Andrew (Andrew.Ingraham@compaq.com)
Date: Mon Nov 06 2000 - 18:47:47 PST


> According to Agilent (and using Agilent equipment), you may use a single
> probe.
> Connect
> the probe tip to one of your +/- nets and the ground tip to GND. They do
> offer
> differential probes, but they are not be high bandwith capable.
 
That's OK as long as there is no significant common-mode noise. If there is
(added noise or +/- skew), then the single ended measurement would be in
error. Common-mode noise would corrupt the eye pattern; the differential
receiver would see bigger margins than you would measure.

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