User Manual

RIGOL
© 2006 RIGOL Technologies, Inc.
User’s Guide for DG3000 Series
3-18
Example 10: To Generate a PWM waveform
To generate a PWM waveform with 1kHz frequency, 300us pulse width, the carry
wave is 130Hz, and the width deviation is 200us.
Steps:
1. Choose Pulse as the carry wave, the default type of the source is internal.
2. Set the frequency, the amplitude and the offset of the carry wave.
(1) Press Freq , input the digit “1”, choose the unit “kHz”, set the frequency to
be 1kHz.
(2) Press Ampl , input the digit “4”, choose the unit “Vpp”, set the amplitude to
be 4Vpp .
(3) Press Offset , input the digit “0”, choose the unit “Vdc”, set the offset to be
0Vdc.
(4) Press DtyCyc , input the digit “300”, choose the unit “us”, set the duty
cycle to be 300us.
(5) Press Edge , input the digit “40”, choose the unit “ns”, set the edge to be
40ns.
3. Choose the modulation type PWM.
Press Mod, enter the PWM interface.
4. set the modulation frequency
Press PWM Freq , input the digit “130”, choose the unit “Hz”, set the
modulation frequency to be 130Hz.
5. set the width deviation
Press Width Dev , input the digit “200”, choose the unit “us”, set the width
deviation to be 200us.
6. Choose the modulation wave
Press Shape , choose “sine” as the modulation wave.
Then the generator will put out a PWM waveform according to the parameters
we have just set.
7. Close the modulation function
Press Mod, close the modulation function.