Appendix
70
2.26 Outputting a PWM Waveform
You can configure the 81150A / 81160A to output a pulse width modulated
(PWM) waveform. The Keysight 81150A / 81160A provides PWM for pulse
carrier waveforms, and PWM is the only type of modulation supported for
pulse waveforms. In PWM, the pulse width or duty cycle of the carrier
waveform is varied according to the modulating waveform. You can specify
either a pulse width and width deviation, or a pulse duty cycle and duty
cycle deviation, the deviation to be controlled by the modulating waveform.
For this example, you will specify a pulse width and pulse width deviation
for a 1 kHz pulse waveform with a 100 Hz sine wave modulating waveform.
Select the carrier
waveform
parameters
Press and then press the Frequency, Delay, Ampl, Offset, Width,
and Lead Edge and Trail Edge softkeys to configure the carrier waveform.
For this example, select a 1 kHz pulse waveform with an amplitude of 1 Vpp,
a 0 V offset, a pulse width of 500 s, and a lead edge of 70 ns and trail edge
of 20 ns.
Press (PWM is the only modulation type for Pulse).
Notice that a status message "PWM by Sine" is shown in the status line.