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Agilent 5488A Scope

Question asked by arobertson on Oct 15, 2009
Latest reply on Oct 30, 2009 by ko2054
I recently got an Agilent 5488A Scope, it has 1134A probes and I'm using E2678A differential heads.
The scope is goig to be used for work on computor memory.  To verify everything was working okay I wired up CLK / CLK# on a standard DDR2 UDIMM module. When I look at both signals on seperate probes everything looks fine but when I hook both up to the one differential head it still looks like I'm looking at just one of the signals (i.e. signal is still fairly jagged, duty cycle etc isn't as even as it should). 

I've calibrated the probes and checked the differential box etc.

I feel I may be doing something goofy here but I can't work out what it is.

Hope someone can help.