Teledyne LeCroy JTA2 - Manual (Page 20)

JTA2 Option
18
ISSUED: December 2003 JTA2-OM-E Rev A
Displaying data acquired from multiple sweeps of the waveform, Persistence Trace computes a
vector trace based on the bit map of the underlying signal acquisitions. Detail is then shown in a
choice of three shapes: average, range, and sigma. These are created without destroying the
underlying data, allowing the display of analytical results from raw data.
Typical applications of Persistence Trace are given in this table:
If you want to Use
see edge detail in a fast signal average
eliminate noise on a persistence trace average
assess typical noise on a persistence trace sigma
assess worst case noise on a persistence trace
and use it to create a tolerance mask range
To Set Up Trace Persistence
1. Touch Math in the menu bar, then Math Setup... in the drop-down menu.
2. In the "Math" dialog, touch an unused Fx button to simply make a selection from the
Select Math Operator menu. Or, touch an Fx tab for more setup
options.
Note: By default, unused Fx positions are designated as zooms of C1. However, the traces are disabled, as indicated by
an unchecked On box alongside the Fx button:
3. Touch the Jitter Functions button in the Select Math Operator menu, then touch one of
the Persistence Trace buttons:
Ptrace Mean
Ptrace Range
Ptrace Sigma