[SI-LIST] Q. on DDR rise time measurements

Greetings!

In measuring some DDR data traces using a 10Gs/s scope I am seeing more
waveshape anomalies than with
previous slower scopes. In particular, I am seeing a 77ps rise time edge
inside the valid data window. This edge
is embedded in a much slower (~500ps 10-90) edge - so the fast edge only
exists for a short time. Previous (slower)
scopes displayed nice smooth edges through this transition region -
naturally. The question is : Can a short duration, small (<0.15V), fast
rise time pulse cause a DDR functionality issue?? 

 

Best Regards
Charles Grasso
Compliance Engineer
Echostar Communications Corp.
Tel: 303-706-5467
Fax: 303-799-6222
Cell: 303-204-2974
Pager/Short Message: 3032042974@xxxxxxxxx
<BLOCKED::mailto:3032042974@xxxxxxxxx> 
Email: charles.grasso@xxxxxxxxxxxx
<BLOCKED::mailto:charles.grasso@xxxxxxxxxxxx> 

 


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