Teledyne LeCroy JTA2 - Manual (Page 25)

JTA2-OM-E Rev A ISSUED: December 2003
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8. A second setup dialog opens to the right of the main with more setup options. The
options offered depend on the parameter you chose, but all include Level is, Percent
Level, Slope, and Hysteresis. A Find Level button is also provided in this mini-dialog.
Option Field Settings
Level Is Percent Absolute
Percent Level 0 to 100%
Slope Positive Negative
Hysteresis 0 div to 10 div
Note: The Hysteresis selection imposes a limit above and below the Level, which precludes measurements of noise or
other perturbations within this band. The width of the band is specified in milli-divisions.
Guidelines for Use
1. Hysteresis must be larger than the maximum noise spike you want to ignore.
2. The largest value of hysteresis usable is less than the distance from the level to the closest extreme value of the
waveform.
3. Unless you know the largest noise and closest extreme level that will ever occur on any cycle, leave some margin on
both sides of the level.