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Commands by Subsystem 3
Agilent InfiniiVision 5000 Series Oscilloscopes Programmer's Reference 219
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.)
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,NONE