RIGOL DG4000 Series - Manual (Page 132)

RIGOL Chapter 5 Modulated Waveform Output
DG4000 Series User’s Guide 5-32
PWM
A PWM (Pulse Width Modulation) modulated waveform consists of carrier
waveform and modulating waveform. 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).
 After PWM is enabled, the instrument will generate PWM waveform with the
currently specified carrier and modulating waveforms.
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 Pulse Width/Duty Cycle
After the carrier waveform shape is selected, press Width/Duty to highlight
“Width” or “Duty” and input the desired value using the numeric keyboard or
direction keys and knob.