X-Stream Operator’s Manual
WM-OM-E Rev I 401
ampl asym Amplitude Asymmetry
Definition aasym = 1 [ |(taa+ - taa-)| / (taa+ + taa-)]
Description For a perfectly symmetric waveform, aasym=1. If any one side of the
waveform is missing, aasym=0.
Parameter Settings Selecting this parameter displays a hysteresis-dialog for setting the
hysteresis value to a specified number of vertical divisions.
p@lv Period at Level
Definition Calculates the period of each cycle in an acquired waveform
Description For each cycle in a waveform, p@lv determines the time from the
beginning of the cycle as defined by a user specified threshold and slope
to the end of the cycle as shown in the diagram below.
Parameter Settings Selecting this parameter accesses a dialog to set hysteresis, level and
slope. A hysteresis value defines the hysteresis, in divisions. That is, a
voltage band is extended equidistantly above and below the selected
level. In order for the signal to be considered valid, and not as noise, the
signal must exceed the upper or lower limits of this band by half the
hysteresis-division setting.
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