RIGOL DG4000 Series - Manual (Page 133)

Chapter 5 Modulated Waveform Output RIGOL
DG4000 Series User’s Guide 5-33
To Select Modulating Waveform Source
Press Mod  Source to select “Int” or “Ext” modulating waveform source.
1. Internal Source
When internal modulation source is selected, press Shape to select Sine,
Square, Triangle, UpRamp, DnRamp, Noise or Arb as modulating waveform.
The default is Sine.
 Square: 50％ duty cycle.
 Triangle: 50％ symmetry.
 UpRamp: 100％ symmetry.
 DnRamp: 0％ symmetry.
 Arb: when arbitrary waveform is selected as modulating waveform, the
generator would limit the waveform length to 2kpts automatically.
Note: Noise can be used as modulating waveform but can not be used as carrier
waveform.
2. External Source
When external modulation source is selected, the Shape menu will be grayed
out and disabled. The generator accepts the external modulating signal from
the [Mod/FSK/Trig] connector at the rear panel. The “WidthDev” (or
“DutyDev”) is controlled by the ±2.5 V signal level of the connector.
To Set Modulating Waveform Frequency
When internal modulation source is selected, press PWM Freq to set the
frequency of the modulating waveform.
 Use the numeric keyboard or direction keys and knob to input the desired
frequency value.
 The frequency range is from 2mHz to 1MHz and the default is 100Hz.
Note: when “Ext” modulation source is selected, this menu is grayed out and
disabled.