What equipment do I need to test an eye diagram for USB?
What are the minimum requirements for a test like this?


Minimum requirements for test equipment to use for USB 2.0 signal quality evaluation is listed at USB.org in the following place. There are links that describe electrical test procedures and tool requirement for Rohde&amp;Schwartz, Tektronix, Agilent, LeCroy, and Yokogawa oscilloscopes.

Typically the eye evaluation software tools are offered on scopes with no less than 2GHz bandwidth. For Tektronix, the eligible scope series are TDS7254/B, TDS7704/B, CSA7404/B, TDS6604/B, TDS6804/B, TDS6404, DPO7254, DPO7354, and DPO/DSA70000. The smallest eligible oscilloscope for USB 2.0 testing is MSO/DPO5204.

For FS eveluation you don't need differential probes, the scope does it mathematically using single-ended probes.

However, the software package can't be installed on smaller bandwidth scopes, so, even if 500 MHz bandwidth is OK for FS eyes, it is unlikely that you can use this scope.