Application Examples
Motor Speed Co
ntrol by Pulse-Width Modulation
Pulse-width modulation is used for controlling the speed of a DC motor or the
luminance of a n LED (Light Emitting Diode). Use the instrument PWM function
to control th
e DC motor speed.
1. Connect the instrument
output and a
DUT using
a BNC-to-alligator clip
adapter.
2. Select Pulse as an output
waveform and then select
PWM as a mo
dulation
type.
Set the frequency to
approxi
mately 100 kH z.
3. Connect the output to an
oscilloscope. Confirm
that a pulse-width
modulation waveform
is displayed on the
oscilloscope screen.
Select Pulse Duty and
change the duty rate.
Observe that the motor
speed changes if you
change the duty rate.
94 AFG3000 and AFG3000C Series User Manual
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