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Chapter 4 Remote Interface Reference
Arbitrary Waveform Commands
4
• The function generator does not distinguish between upper- and
lower-case letters. Therefore, ARB_1 and arb_1 are the same name.
All characters are converted to upper case.
•Use the DATA:CAT? command to list the names of the five built-in
waveforms (non-volatile), “VOLATILE” if a waveform is currently
downloaded to volatile memory, and the names of any user-defined
waveforms (non-volatile).
FUNCtion USER
FUNCtion?
Select the arbitrary waveform function and output the current arbitrary
waveform. When executed, this command outputs the arbitrary
waveform currently selected by the FUNC:USER command (see the
previous page). The selected waveform is output using the current
frequency, amplitude, and offset voltage settings. The FUNC? query
returns “SIN”, “SQU”, “RAMP”, “PULS”, “NOIS”, “DC”, or “USER”.
•Use the APPLy command or the equivalent FREQ, VOLT, and
VOLT:OFFS
commands to select the frequency, amplitude, and offset
of the waveform
.
• The maximum amplitude will be limited if the data points do not
span the full range of the output DAC (Digital-to-Analog Converter).
For example, the built-in “SINC” waveform does not use the full
range of binary values between ±1 and therefore its maximum
amplitude is 6.087 Vpp (into 50 ohms).
• If you select an arbitrary waveform as the modulating waveshape
(“USER”), the waveform is automatically limited to 4K points.
Extra waveform points are removed using decimation.
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