HDO6000 High Definition Oscilloscope
SET UP MATH ON PARAMETERS USING SCRIPT
1. Touch Measure → My Measure... on the menu bar.
2. Touch the output Px tab or button to display the parameter setup dialog.
3. Touch the Math on Parameters button.
4. Touch Source1 and Source2 and select the input parameters (P1 to P8).
If you are applying math to a single parameter (for example, invert), just select it in Source1.
5. Touch Math Operator and choose P Script from the Select Measurement menu.
6. In the right-hand Script Math dialog, touch Script Language and choose either VBScript or JScript.
7. Touch the Edit Code button.
The Script Editor window opens.
8. Enter code in the script editor, or call up an existing script from a file storage location.
If you create your script in this window, you can export it to a new file.
Calculating Measurements
Determining Top and Base Lines
Proper determination of the top and base reference lines is fundamental for ensuring correct parameter
calculations. The analysis begins by computing a histogram of the waveform data over the time interval
spanned by the left and right measurement gates. For example, the histogram of a waveform transitioning
in two states will contain two peaks (see figure). The analysis will attempt to identify the two clusters
that contain the largest data density. Then the most probable state (centroids) associated with these two
clusters will be computed to determine the top and base reference levels: the top line corresponds to the
top and the base line to the bottom centroid.
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