Agilent Technologies InfiniiVision 5000 Series Programmer's Manual page 257

Introduction to The commands in the MEASure subsystem are used to make parametric
:MEASure
measurements on displayed waveforms.
Commands
Measurement Setup
To make a measurement, the portion of the waveform required for that
measurement must be displayed on the oscilloscope screen.
Measurement Type
period, duty cycle, or frequency
pulse width
rise time
fall time
Measurement Error
If a measurement cannot be made (typically because the proper portion of
the waveform is not displayed), the value +9.9E+37 is returned for that
measurement.
Making Measurements
If more than one waveform, edge, or pulse is displayed, time
measurements are made on the portion of the displayed waveform closest
to the trigger reference (left, center, or right).
When making measurements in the delayed time base mode
(:TIMebase:MODE WINDow), the oscilloscope will attempt to make the
measurement inside the delayed sweep window. If the measurement is an
average and there are not three edges, the oscilloscope will revert to the
mode of making the measurement at the start of the main sweep.
When the command form is used, the measurement result is displayed on
the instrument. When the query form of these measurements is used, the
measurement is made one time, and the measurement result is returned
over the bus.
Measurements are made on the displayed waveforms specified by the
:MEASure:SOURce command. The MATH source is an alias for the
FUNCtion source.
Not all measurements are available on the FFT (Fast Fourier Transform).
Reporting the Setup
Use the :MEASure? query to obtain setup information for the MEASure
subsystem. (Currently, this is only :MEASure:SOURce.)
Agilent InfiniiVision 5000 Series Oscilloscopes Programmer's Guide
Commands by Subsystem
Portion of waveform that must be displayed
at least one complete cycle
the entire pulse
rising edge, top and bottom of pulse
falling edge, top and bottom of pulse
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