Using EyeScan with the FS2331 Probe
EyeScan is a feature available on Agilent 16760 and 16753/4/5/6 logic analyzer cards. It provides the ability to perform eye measurements on multiple channels simultaneously. For more detailed information on the use of the feature refer to the Help files for either logic analyzer. Several points to bear in mind when using EyeScan with the FS2331 DDR DIMM probe are:
1.You cannot run EyeScan on the signal being used as a clock to the logic analyzer. This makes it impossible to view Data Clk, and either CK0 or Buffered Command Clk depending on the setup of the Command Analyzer.
2.Because Data Clk and Buffered Command Clock are signals that are created by the probe, they are delayed relative to other DDR DIMM signals when received at the logic analyzer. This means that when using these signals as clocks the valid eye diagrams seen are actually to the left of the centerpoint of the display.
3.It may be more effective to get satisfactory Eye Finder results first and then move onto using EyeScan. It is also faster to do the first EyeScan measurements on just a few channels to insure that the voltage, timebase and screen settings are satisfactory before running an EyeScan on a large group of signals.
Here is an example EyeScan measurement of a DQ signal taken on a DDR333 bus using the FS2331 probe:
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