4 Remote Interface Reference
216 Keysight 33210A User’s Guide
PWM Commands
PWM:SOURce {INTernal|EXTernal}
PWM:SOURce?
Select the source of the modulating signal. The function generator will accept an
internal or external modulation source. The default is INT. The :SOUR? query
returns “INT” or “EXT”.
–If you select the External source, the carrier waveform is modulated with an
external waveform. The pulse width or pulse duty cycle deviation is controlled
by the ±5V signal level present on the rear-panel Modulation In connector. For
example, if you have set the pulse width deviation to 50 μs using the PWM:DEV
command, then a +5V signal level corresponds to a 50 μs width increase.
Lower external signal levels produce less deviation.
PWM:INTernal
:FUNCtion {SINusoid|SQUare|RAMP|NRAMp|TRIangle|NOISe|USER}
:FUNCtion?
Select the shape of the modulating waveform. Used only when the
Internal
modulation source is selected (
PWM:SOUR INT
command).
(The carrier must be a pulse waveform for PWM.)
The default is SIN. The :FUNC?
query returns “SIN”, “SQU”, “RAMP”, “NRAM”, “TRI”, “NOIS”, or “USER”.
– Select “SQU” for a square waveform with a 50% duty cycle.
– Select “RAMP” for a ramp waveform with 100% symmetry.
– Select “TRI” for a ramp waveform with 50% symmetry.
– Select “NRAM” (negative ramp) for a ramp waveform
with 0% symmetry.
Use the APPLy command or the equivalent FUNC, FREQ, VOLT, and VOLT:OFFS
commands to configure the carrier waveform.
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