228 Chapter 9
Multitone Waveform Generator
Creating, Viewing, and Optimizing Multitone Waveforms
4. Press Done.
5. Press
Apply Multitone.
6. Press
More (1 of 2) > ARB Setup > Waveform Utilities > Waveform Statistics > Plot CCDF.
You should now see a display that is similar to the one shown in Figure 9- 7. The CCDF plot
displays the peak to average characteristics of the waveform with all phases set to zero.
Figure 9-7 CCDF Plot with Fixed Phase Set
7. Press
Mode Setup > Initialize Table.
8. Press
Initialize Phase Fixed Random to Random.
9. Press
Random Seed Fixed Random to Random.
10. Press
Done.
11. Press
Apply Multitone.
12. Press
More (1 of 2) > Waveform Statistics > Plot CCDF.
You should now see a display that is similar to the one shown in Figure 9- 8. The CCDF plot
displays the peak to average characteristics of the waveform with randomly generated phases and
a random seed.
The random phase setup simulates the typically random nature of multitone waveforms. Notice
that randomly distributed phases result in a much lower peak to average ratio than fixed phases.
An increase in the number of tones with random phases will decrease the probability of a
maximum peak power occurrence.
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