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You can also make measurements using user-defined thresholds instead
of the standard thresholds.
When the command form of a measurement is used, the oscilloscope is
placed in the continuous measurement mode. The measurement result
will be displayed on the front panel. There may be a maximum of 5
measurements running continuously. Use the SCRatch command to turn
off the measurements.
When the query form of the measurement is used, the measurement is
made one time, and the measurement result is returned.
• If the current acquisition is complete, the current acquisition is
measured and the result is returned.
• If the current acquisition is incomplete and the oscilloscope is
running, acquisitions will continue to occur until the acquisition is
complete. The acquisition will then be measured and the result
returned.
• If the current acquisition is incomplete and the oscilloscope is
stopped, the measurement result will be 9.99999e+37 and the
incomplete result state will be returned if SENDvalid is ON.
All measurements are made using the entire display, except for
VAVerage and VRMS which allow measurements on a single cycle.
Therefore, if you want to make measurements on a particular cycle,
display only that cycle on the screen.
Measurements are made on the displayed waveforms specified by the
SOURce command. The SOURce command lets you specify two sources.
Most measurements are only made on a single source. Some
measurements, such as the DELTatime measurement, require two
sources.
If the waveform is clipped, the measurement result may be questionable.
In this case, the value returned is the most accurate value that can be
made using the current scaling. You might be able to obtain a more
accurate measurement by adjusting the vertical scale to prevent the
waveform from being clipped.
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