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3 - 14 USING THE COMBISCOPE INSTRUMENTS
READ? Requests to execute the default DC measurement.
Since this is not possible with the chosen
configuration, an execution error is generated and
no result is returned.
CONFigure:RISE:TIME Configures the CombiScope instrument to perform a
rise time measurement.
READ:RISE:OVERshoot? Requests to read the rise time overshoot. Because the
CombiScope instrument is able to calculate the rise
overshoot value when it is set up for a rise time
measurement, the desired result is calculated and
returned.
A READ? also allows the same parameter sets as the corresponding CONFigure
instructions. But, these sets only serve to specify the desired result. They are
ignored as far as they affect instrument settings. The parameters can be sent for
compatibility with the preceding CONFigure command.
Example:
CONFigure:RISE:TIME Configures the oscilloscope to perform a default rise
time measurement (10% to 90% increase of the
signal amplitude).
READ:RISE:TIME? 20,80 Requests for the rise time of the 20 to 80% increase
of the signal amplitude. As the CombiScope
instrument is able to respond to this request, the
desired rise time is calculated and returned.
3.3.5 Multiple measurements
Sometimes it is necessary to perform multiple measurements of the same signal
characteristic. This can be realized by executing multiple MEASure? queries.
However, this implies that the relative time-consuming configuration portion of
MEASure? is unnecessarily repeated. This can be easily avoided by using the
CONFigure and READ? concept as described in the preceding chapter. This
concept allows you to do the configuration only once by sending the CONFigure
command one time. Sending multiple READ? queries next, causes the instrument
to repeatedly execute the desired measurement.
Example:
CONFigure:FREQuency Configures the instrument to perform a frequency
measurement.