RIGOL DG5000 Series - Manual (Page 94)

RIGOL Chapter 4 Common Modulation Output
User’s Guide for DG5000 4-18
To Select Modulating Waveform Source
Press Mod  Source to select “Int” or “Ext” modulating waveform source.
1. Internal Source
When internal source is selected, the modulating waveform is set as a Square with
50% duty cycle, and the “shift” frequency at which the output phase shifts
between “carrier phase” and “modulating phase” is determined by “PSK Rate”.
2. External Source
When external source is selected, the generator accepts the external modulating
signal from the ExtTrig connector (see the following figure) at the rear panel.
Note: The ExtTrig connector used to control PSK modulation externally is
different from the Mod in/I connector used to control AM/FM/PM modulation
externally. In PSK modulation, ExtTrig has an adjustable edge polarity.
To Set PSK Rate
When internal source is selected, press PSK Rate to set the “shift” frequency at
which the output frequency shifts between “carrier phase” and “modulating phase”.
 Input the desired rate value using numeric keyboard or knob.
 The available rate ranges from 2 mHz to 1 MHz, and the default value is 100 Hz.
Note: This menu will be grayed out and disabled when external source is selected.