Instructions
Chapter 2 Front Panel Operations RIGOL
DG2000 User Guide 2-41
Phase Modulation (PM)
For phase modulation (PM), the phase of the carrier waveform varies with the
instantaneous voltage of the modulating waveform.
To Select PM Modulation
When the Shift key is illuminated, press Home/Menu Modulation "PM" to
enable the PM function. When Modulation is enabled, Sweep or Burst will be
automatically disabled (if enabled currently). Tap the icon
at the upper-right
corner of the interface (when Sine is selected as the carrier waveform) to view and
set the parameters of the current carrier waveform. Tap the icon
at the
upper-right corner of the interface again to go back to the current modulation
parameter interface.
To Select the Carrier Waveform
PM carrier waveform could be Sine, Square, Ramp, or Arbitrary waveform. The
default is Sine.
When the Shift key is illuminated, press Home/Menu Continuous to
select the desired carrier waveform. Also, when the Shift key is not illuminated,
you can directly press the corresponding waveform function key on the front
panel to select the desired carrier waveform.
Pulse, Noise, Harmonic, Dual-tone, and DC could not be used as carrier
waveform.
To Set Carrier Waveform Parameters
The different settings of various parameters (e.g. frequency, amplitude, and offset)
of the carrier waveform will affect the output PM modulated waveform. For different
carrier waveform shapes, the ranges of the various parameters are different (the
ranges are related to the instrument model that you are using and the currently
selected carrier waveform). For all carrier waveform shapes, the default values are 1
kHz frequency, 5 Vpp amplitude, and 0 Vdc offset.
When the carrier waveform currently selected is Sine, Square, or Ramp, please
refer to descriptions in "To Output Basic Waveform" to set the parameters of
the carrier waveform currently selected.
When the carrier waveform currently selected is arbitrary waveform, please
refer to descriptions in "To Output the Arbitrary Waveform" to set the
parameters of the carrier waveform currently selected.