RIGOL Chapter 2 Front Panel Operations
2-54 DG1000Z User’s Guide
Pulse Width Modulation (PWM)
For PWM (Pulse Width Modulation), the pulse width of the carrier waveform varies
with the instantaneous voltage of the modulating waveform.
To Select PWM Modulation
PWM can only be used to modulate pulse. To select PWM modulation, press Pulse at
the front panel first and then press Mod to enable PWM function.
If the Pulse function key has not been selected, PWM in Type menu is
unavailable.
When Mod is enabled but the modulation type is not PWM, pressing Pulse will
select PWM automatically.
When Mod is enabled, Sweep or Burst will be automatically disabled (if
enabled currently).
To Select Carrier Waveform Shape
As mentioned before, PWM can only be used to modulate Pulse. To select Pulse
waveform, press Pulse at the front panel.
To Set Carrier Waveform Parameters
The different settings of various parameters (frequency, amplitude, DC offset, pulse
width, duty cycle and etc.) of the carrier waveform will influence the PWM modulated
waveform. For all pulses, the ranges of the various parameters are different. And the
default values are 1kHz frequency, 5Vpp amplitude, 0V
DC
offset 500µs pulse width
and 50% duty cycle.
Please refer to the introduction in “To Output Basic Waveform” to set the
parameters of the carrier waveform.
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