AnsweredAssumed Answered

USB 2.0 mask for eye diagram

Question asked by mdivivo on Dec 21, 2011
Latest reply on Dec 21, 2011 by algoss

Like • Show 1 Like1
Comment • 1

Hello everybody,

We are trying to measure some USB signals on our PCB.
The system is very complex so we would like to understand if our signals are still good enough.
For example we are measuring a differential USB signal from an output port of a transceiver..both near the tx and far the tx (on the connector)...
We have a DSO 90804A so I want to know where can I find the USB mask ? Is it available or I need to install the USB 2.0 compliance test ?

Thanks to everybody

Regards,

Marco

No one else has this question

Outcomes

1 Reply

algoss Dec 21, 2011 5:32 AM
Mark Correct
Correct Answer
Because of the nature of USB, building an Eye Diagram is non-trivial. If you are really interested in making accurate measurements, according to the USB spec, you should buy the USB Compliance SW, AND the USB Compliance fixtures. If you'd like to see how it's done, and why, you can read the compliance test manual, available here:http://cp.literature.agilent.com/litweb/pdf/N5416-97007.pdf

Al
Like • Show 0 Likes0
Actions

USB 2.0 mask for eye diagram

Outcomes

Related Content

Recommended Content