RIGOL DG4000 Series - Manual (Page 127)

Chapter 5 Modulated Waveform Output RIGOL
DG4000 Series User’s Guide 5-27
4FSK
When 4FSK (4 Frequency Shift Keying) modulation is selected, you can configure
the generator to “shift” its output frequency among four preset frequencies
(“carrier frequency” and three “hop frequencies”). The “shift” frequency (4FSK
rate) is determined by the internal signal level of the instrument.
To Select 4FSK Modulation
Press Mod  Type  4FSK to enable 4FSK function.
 When Mod is enabled, Sweep or Burst will be automatically disabled (if
enabled currently).
 After 4FSK is enabled, the instrument will generate 4FSK waveform with the
currently specified carrier and modulating waveforms.
To Select Carrier Waveform Shape
4FSK carrier waveform could be Sine, Square, Ramp or arbitrary waveform (except
DC), and the default is Sine.
 Press the front panel key Sine, Square, Ramp or Arb  Select Wform
(or User, the pre-defined waveform can not be DC) to select the desired
carrier waveform shape.
 Pulse (basic waveform), Noise and DC could not be used as carrier waveform.
To Set 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.