RIGOL DG4000 Series - Manual (Page 110)

RIGOL Chapter 5 Modulated Waveform Output
DG4000 Series User’s Guide 5-10
To Set Modulating Waveform Frequency
When internal modulation source is selected, press PM_Freq to set the
modulating waveform frequency.
 Input the desired frequency value using the numeric keyboard or direction
keys and knob.
 The modulating waveform frequency ranges from 2mHz to 50kHz, and the
default value is 100Hz.
Notice that, this menu will be grayed out and disabled when external modulation
source is selected.
To Set Phase Deviation
Phase deviation is the deviation of the modulating waveform phase relative to the
carrier waveform phase. Press Deviation to set the PM phase deviation.
 Use the numeric keyboard or direction keys and knob to input the desired
phase value.
 The range of phase deviation is from 0º to 360º.
When “Ext” modulation source is selected, the phase deviation is controlled by the
±2.5V signal level at the [Mod/FSK/Trig] connector at the rear panel. For
example, if the phase deviation is set to 180º, +2.5V signal level corresponds to a
180º phase variation. The lower the external signal level, the less deviation would
be generated.