9-2 Signal Oriented Measurement Commands
Overview
The signal oriented measurement commands are used to acquire readings. You can use these
high-level instructions to control the measurement process. These commands are summarized in
Table 9-1.
Table 9-1
Signal oriented measurement command summary
NOTE For all array queries, make sure the computer’s buffer is large enough to accomodate
all array readings. For all non-array queries, the overflow readings are as follows:
exponential format = +9.9E37
2 decimal places format=99.99
3 decimal places format=99.999
4 decimal places format=99.9999
For all array queries, overflow readings are in the exponential format only.
:FETCh? Return last reading
:FETCh:ARRay? Return last array of readings
The :FETCh? command is used to return the last averaged reading, and the :FETCh:ARRay?
command is used to return the last array of readings. After sending either one of these com-
mands and addressing the power supply to talk, the averaged reading or reading array is sent to
the computer. These commands do not affect the instrument setup.
These commands do not trigger measurements. They return the last triggered averaged
reading or reading array. Note that they can repeatedly return the same reading or reading array.
Until there is a new triggered reading(s), these commands continue to return the old triggered
reading(s).
The number of readings to average or put in an array is set using the SENSe:AVERage (for
voltage, current and DVM readings) or SENSe:PCURrent:AVERage (for pulse-current read-
ings) command. See Sections 2 and 3 for details.
Command
Description
:FETCh? Returns the last reading.
:FETCh:ARRay? Returns the last array of readings.
:READ? Triggers a new reading and returns it.
:READ:ARRay? Triggers a new array of readings and returns them.
:MEASure[:<function>]? Performs a READ? on the specified function.
:MEASure:ARRay[:<function>]? Performs a READ:ARRay? on the specified function.
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