Keysight 33210A, Руководство пользователя

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199
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
µ
s. 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