User Manual

RIGOL Chapter 4 Common Modulation Output
User‟s Guide for DG5000
4-12
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” rate of the output amplitude between “carrier
amplitude” and “modulation amplitude” is determined by “ASK Rate”.
2. External Source
When external source is selected, the generator accepts the external modulating
signal from the [ExtTrig] connector (as shown in the picture bellow) at the rear
panel.
Notice that, the [ExtTrig] connector used to control ASK modulation externally is
different from the [ModIn] connector used to control AM/FM/PM modulation
externally. In ASK modulation, [ExtTrig] has an adjustable edge polarity.
To Set ASK Rate
When internal source is selected, press ASK Rate to set the “shift” rate at which the
output amplitude shifts between “carrier amplitude” and “modulation amplitude”.
 Input the desired frequency value using numeric keyboard or knob.
 The available frequency ranges from 2 mHz to 1 MHz, and the default value is 100
Hz.
Notice that, this menu will be grayed out and disabled when external source is
selected.