Teledyne LeCroy HDO 4000 Operators Manual - Manual (Page 61)

HDO4000 High Definition Oscilloscope
Parameter Description
Width
Width of cyclic signal determined by examining 50% crossings in data input. If first transition after left cursor
is a rising edge, waveform is considered to consist of positive pulses and width the time between adjacent
rising and falling edges. Conversely, if falling edge, pulses are considered negative and width the time
between adjacent falling and rising edges. For both cases, widths of all waveform pulses are averaged for
the final result.
WidthN
(widn) Time of cyclic signal determined by examining 50% crossings in data input. The widthN is measured from
falling edge to rising edge.
Quick Measurements
Once you have set custom parameters in an available location, you can quickly hide or display them by
choosing Measure > Measure Setup and checking the Show Table box. You do not have to go through the
entire setup process.
Table of measurements open beneath grid. Far left cell opens the Measure dialog.
To quickly access the Measure Setup dialog if it is closed, touch the far left cell of the readout table
labeled Measure.
View Statistics
You can add the statistical measures value(last), mean, min., max., sdev, and num(ber of measurements
computed) to the measurement parameter readout table.
To turn on statistics, access the Measure dialog and check Statistics On. Clear the checkbox to remove
statistics from the readout. You can also choose Measure > Statistics from the menu bar.
The num statistic is the number of measurements computed. For any parameter that computes on an
entire waveform (like amplitude, mean, minimum, maximum, etc.) the value displayed represents the
number of sweeps.
For any parameter that computes on every event, the value displayed is equal to the number of events per
acquired waveform. If x waveforms were acquired, the value represents x times the number of cycles per
waveform. The value(last) statistic is equal to the measurement of the last cycle on the last acquisition.
To reset the statistics counter, touch Clear Sweeps on the display or Front Panel.
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