to create and rate content, and to follow, bookmark, and share content with other members.
USB high speed what scope to I use
Question asked by
on Jan 26, 2007
on Jan 26, 2007 by jkinsley
Show 0 Likes
I am interested in USB conformance testing. Can you tell me if my 1GHZ digital oscilloscope is good enough to do the test? If not can you recommend the right equipment and software to get setup for testing? How much will this cost me?
No one else has this question
Mark as assumed answered
This content has been marked as final.
Show 1 comment
(Required, will not be published)
Jan 26, 2007 2:03 PM
The 1GHz scope would be sufficient for LS and FS testing. However for HS (480Mbps) testing a system of 2GHz is required.
The risetime of the HS signal is spec'd at >= 500ps. That means a failure is a risetime faster than 500ps. A scope with a system bandwidth (scope + probe) of 1GHz would have a risetime of 500ps. That means that it would never show a failure.
A 2GHz bandwidth will measure a 300ps risetime with ~10% error.
Show 0 Likes
Retrieving data ...
How to trigger FieldFox when average on with SCPI commands
1 path 2 port cal vs. Enhanced Response cal
Measuring Thermal Noise of Amplifier
HP 8594A YTO readings
Noob Graphing Question