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Chapter 4 Remote Interface Reference
Arbitrary Waveform Commands
4
• If you copy to a waveform name that already exists, the previous
waveform is overwritten (and no error will be generated).
However, you cannot overwrite any of the five built-in waveforms.
• Up to four user-defined waveforms can be stored in non-volatile
memory. If memory is full and you try to copy a new waveform to non-
volatile memory, a “Not enough memory” error is generated. Use the
DATA:DEL command to delete the waveform in volatile memory or
any of the four user-defined waveforms in non-volatile memory.
Use the DATA:CAT? command to list all waveforms currently stored
in volatile and non-volatile memory. The default selection is
EXP_RISE.
• The following statement shows how to use the DATA:COPY command
to copy the VOLATILE waveform into named storage “ARB_1”.
DATA:COPY ARB_1, VOLATILE
FUNCtion:USER {<arb name>|VOLATILE}
FUNCtion:USER?
Select one of the five built-in arbitrary waveforms, one of four user-defined
waveforms, or the waveform currently downloaded to volatile memory.
The
:USER?
query returns “EXP_RISE”, “EXP_FALL”, “NEG_RAMP”,
“SINC”, “CARDIAC”, “VOLATILE”, or the name of any user-defined
waveforms in non-volatile memory. The default selection is “EXP_RISE”.
• Note that this command does not output the selected arbitrary
waveform. Use the FUNC USER command (see the following page)
to output the selected waveform.
• The names of the five built-in arbitrary waveforms are:
“EXP_RISE”, “EXP_FALL”,
“NEG_RAMP”,
“SINC”, and “CARDIAC”.
• To select the waveform currently stored in volatile memory, specify
the VOLATILE parameter. The keyword “VOLATILE” does not have
a short form.
• If you select a waveform name that is not currently downloaded,
a “Specified arb waveform does not exist” error is generated.
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