beautypg.com

Teledyne LeCroy WaveExpert 100H Operators Manual User Manual

Page 181

background image

Wave Expert

WE-OM-E Rev A

179

Qualified Parameters

Some LeCroy instruments and software packages give you the ability to constrain parameter
measurements to a vertically or horizontally limited range, or to occurrences gated by a second
waveform. Furthermore, both constraints can operate together. This capability enables you to
exclude unwanted characteristics from your measurements. It is much more restrictive than
Measure Gate, which is used only to narrow the span of the waveform for analysis, along the
horizontal axis.

Note: Since this feature operates on only a subset of the data, possible alerts or status indicators concerning the
measurement (such as "Data range too low") are not displayed.

Range Limited Parameters

To Set Up Range Qualifiers

1. From the menu bar, select Measure, then Measure Setup... from the drop-down menu.
2. Touch

a

Px tab to open the setup dialog.

3. Touch

inside

the

Source field and select a source from the pop-up menu.

4. Touch

inside

the

Measure field and select a parameter from the pop-up menu.

5. Touch

the

Accept tab of the right-hand dialog, then touch the Values In Range checkbox.

Depending on whether you select a vertical or horizontal parameter, the correct units will
be automatically displayed (V, s, Hz, dB) in the Between and And fields. Or, if you select a
simple ratio parameter (such as power factor) that yields a dimensionless number, no units
will be displayed.

6. Touch

the

Find Range button to quickly display the most recent value of the parameter

measurement. From there it is a simple matter to set the desired range.

Amplitude Parameter
(range set manually)