[SI-LIST] Re: Pros/Cons of Agilent vs Tek scope for DDR2/DDR3 characterization

Also I came across the probing solution provided by nexus technologies for DDR3 
probing(http://nexustechnology.com/products/memory/ddr3/scope/).They extend the 
DIMM board to some G3PO connectors on the same board.And then one can use the 
SMA to G3PO cables to probe the signals.
I would like to have some feedbacks if someone has already used it.I have the 
following points for the same.
1)The nexus solution seems have some skew between the differential signals like 
 between Clk and Clk_B and DQS and DQS_B.So one might have to DESKEW the 
differential pair in the scope.Can there be any issue in measurements due to 
this skew?
2)I am not sure how mechanical strong this solution is?I mean, 
connecting/disconnecting the G3PO conectors all the time  on this board may 
damage this board?

In case you have some more feedbacks in terms of Signal Integrity for this  
solution then please let me know.

Regards,
Rajeev

On Fri, 17 Apr 2009 09:38:25 +0530  wrote
>Need to make a selection of which scope to buy for DDR2/3 i/f JEDEC compliance 
>testing on the memory controller(s). I personally like Tek scope but it is 
>more expensive and its DDR  compliance test software doesn't support all the 
>required parameters.
>Did anybody evaluate both scopes for this application and which one you 
>picked? What were pros/cons to go with Tek vs Agilent or vice versa?
>
>Thanks in advance
>
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