Keysight 33210A - Page 201

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Chapter 4 Remote Interface Reference
Pulse Width Modulation (PWM) Commands
4
• 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.
Note: Arbitrary waveforms are optionally available with the 33210A
(Option 002). To upgrade your 33210A to include arbitrary waveform
functionality, go to
www. keysight .com/find/33210U .
PWM:INTernal:FREQuency {<frequency>|MINimum|MAXimum}
PWM:INTernal:FREQuency? [MINimum|MAXimum]
Set the frequency of the modulating waveform. Used only when the
Internal modulation source is selected (PWM:SOUR INT command).
Select from 2 mHz to 20 kHz. The default is 10 Hz. MIN = 2 mHz.
MAX = 20 kHz. The :FREQ? query returns the internal modulating
frequency in hertz.
PWM:DEViation {<deviation in seconds>|MINimum|MAXimum}
PWM:DEViation? [MINimum|MAXimum]
Set the pulse width deviation in seconds. This value represents the
variation in width (in seconds) from the pulse width of the carrier pulse
waveform. The default is 10 µs. MIN = 0 s. MAX = 500 s (limited by the
period, minimum pulse width, and edge time). The :DEV? query returns
the pulse width deviation in seconds.
• The pulse width deviation cannot exceed the current pulse width.
• The pulse width deviation is also limited by the minimum pulse width
(Wmin):
Width Deviation < Pulse Width – Wmin
and
Width Deviation <
Period – Pulse Width – Wmin
where:
Wmin = 40 ns for period <
10 s.
Wmin = 200 ns for period > 10 s, but < 100 s.
Wmin = 2 µs for period > 100 s, but < 1000 s.
33210A users guide.book Page 199 Wednesday, July 16, 2008 11:16 AM