Agilent Technologies Agilent 33500 Series Operating And Service Manual page 275

PWM Subsystem
When you select an arbitrary waveform as the modulating source, the frequency changes to the frequency of the
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arbitrary waveform, based on the sample rate and the number of points in the arbitrary waveform.
When using an arbitrary waveform for the modulating source, changing this parameter also changes the cached
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metadata representing the aribtrary waveform's sample rate. You can also change the modulating frequency of an
arbitrary waveform with FUNCtion:ARBitrary:FREQuency, FUNCtion:ARBitrary:PERiod, and
tion:ARBitrary:SRATe. These commands and the modulation frequency command are directly coupled in order to
keep the arbitrary waveform behaving exactly as it was last played. If you later turn modulation off and select that
same arbitrary waveform as the current function, its sample rate (and corresponding frequency based upon the
number of points) will be the same as it was when played as the modulation source.
If the internal function is TRIangle, RAMP, or NRAMp, the maximum frequency limited to 200 kHz. If the internal
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function is PRBS, the frequency refers to bit rate and is limited to 50 Mbps.
This command should be used only with the internal modulation source
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[SOURce[1|2]:]PWM:INTernal:FUNCtion < function >
[SOURce[1|2]:]PWM:INTernal:FUNCtion?
Selects shape of modulating waveform.
{SINusoid|SQUare|RAMP|NRAMp|TRIangle|NOISe|PRBS|ARB},
default SINusoid
View internal function waveforms.
Select a sine wave as the modulating waveform shape:
PWM:INT:FUNC SIN
This command should be used only with the internal modulation source
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Parameter
(PWM:SOURce INTernal).
Typical Return
SIN, SQU, RAMP, NRAM, TRI, NOIS, PRBS,
or ARB
(PWM:SOURce INTernal).
Agilent 33500 Series Operating and Service Guide
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