User manual

RIGOL Chapter 5 Modulated Waveform Output
DG4000 User's Guide
5-6
FM
Modulated waveform consists of carrier waveform and modulating waveform. For
frequency modulation (FM), the frequency of the carrier waveform varies with the
instantaneous voltage of the modulating waveform.
To Select FM Modulation
Press Mod  Type  FM to enable FM function.
 When Mod is enabled, Sweep or Burst will be disabled automatically (if
currently enabled).
 After FM is enabled, the instrument will generate FM waveform with the
currently specified carrier and modulating waveforms.
To Select the Carrier Waveform Shape
FM carrier waveform could be Sine, Square, Ramp or Arbitrary waveform (except
DC). The default is Sine.
 Press the front panel key Sine, Square, Ramp or Arb  Select Wform
(or User, the pre-defined waveform cannot be DC) to select a desired carrier
waveform shape.
 Pulse, Noise and DC could not be used as carrier waveform.
To Set the Carrier Frequency
Different carrier waveforms have different frequency ranges as shown in the table
below. For all the carrier waveforms, the default value is 1kHz.
Carrier Waveform Frequency Range
Sine 1μHz to 160MHz
Square 1μHz to 50MHz
Ramp 1μHz to 4MHz
Arbitrary Waveform 1μHz to 40MHz