Teledyne LeCroy WaveExpert 100H Operators Manual - Manual (Page 134)

Operator’s Manual
132
WE-OM-E Rev A
The lowest-value bin with events is that with a sub-range of 3.0 to 3.1 V. As TTL high voltages need
to be greater than 2.5 V, the lowest bin is within the allowable tolerance. However, because of its
proximity to this tolerance and the degree of the bin's separation from all other values, additional
investigation may be required.
DSO Process
The instrument generates histograms of the parameter values of input waveforms. But first, you
must define the following:
y The parameter to be histogrammed.
y The trace on which the histogram is to be displayed .
y The maximum number of parameter measurement values to be used in creating the
histogram.
y The measurement range of the histogram.
y The number of bins to be used.
Some of these are pre-defined but can be changed. Once they are defined, the oscilloscope is
ready to make the histogram. The sequence for acquiring histogram data is as follows:
1. Trigger.
2. Waveform
acquisition.
3. Parameter calculations.
4. Histogram update.
5. Trigger re-arm.
If you set the timebase for non-segmented mode, a single acquisition occurs prior to parameter
calculations. However, in Sequence mode an acquisition for each segment occurs prior to
parameter calculations. If the source of histogram data is a memory, saving new data to memory