Front-Panel Menu Operation
81150A and 81160A User’s Guide 71
Press the Width Deviation softkey and set the value to 400 µs using the
numeric keypad or the knob and cursor keys.
Set the modulating
frequency
Press the PWM Frequency softkey and then set the value to 5 Hz using the
numeric keypad or the knob and cursor keys.
Select the
modulating
waveform shape
Press the PWM Shape softkey to select the shape of the modulating
waveform. For this example, select a sine wave.
At this point, the 81150A / 81160A outputs a PWM waveform with the
specified modulation parameters (if the output is enabled).
Press to view the waveform and parameters.
To turn off the Graph Mode, press again.
To really view the PWM waveform, you would need to output it to an
oscilloscope. If you do this, you will see how the pulse width varies, in this
case, from 100 to 900 µs. At a modulation frequency of 5 Hz, the deviation is
quite visible.
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