:MEASure Commands 24
Keysight InfiniiVision 4000 X-Series Oscilloscopes Programmer's Guide 569
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 zoomed (delayed) time base mode
(:TIMebase:MODE WINDow), the oscilloscope will attempt to make the
measurement inside the zoomed 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 digital channels or 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.)
Return Format
The following is a sample response from the :MEASure? query. In this case, the
query was issued following a *RST command.
:MEAS:SOUR CHAN1,CHAN2;STAT ON
Measurement Type Portion of waveform that must be displayed
period, duty cycle, or frequency at least one complete cycle
pulse width the entire pulse
rise time rising edge, top and bottom of pulse
fall time falling edge, top and bottom of pulse
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