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The Format Menu
Timing Acquisition Mode Field (Timing only)
Increasing Duration of Storage In the 125-MHz mode a transition on
any one of the 34 bits each sample (if they are all turned on) will cause
storage. Reducing the number of bits that are turned on for any one pod
pair will more than likely increase data storage time.
Separating data lines which contain fast occurring transitions from lines with
slow occurring transitions also helps. When doing this, be sure to cross pod
pair boundaries. It does not help to move fast lines from pod 1 to pod 2, they
must be moved to pod 3, which is a different pod pair.
In the 250 MHz mode a transition on any one of 17 bits (half channel) each
sample (if they are all turned on) will cause storage.
Invalid Data The analyzer only looks for transitions on data lines that
are turned on. Data lines that are turned off store data, but only when
one of the lines that is turned on transitions. If the data line is turned on
after a run, you would see data, but it is unlikely that every transition
that occurred was captured.
11–12
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