Agilent Technologies E8257D PSG User Manual page 242

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
displays the peak to average characteristics of the waveform with all phases set to zero.
Figure 9-7
Peak
Power
7. Press
Mode Setup > Initialize Table
8. Press
Initialize Phase Fixed Random
9. Press
Random Seed Fixed 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
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.
228
.
CCDF Plot with Fixed Phase Set
.
to Random.
to Random.
.
.
.
Figure 9- 7. The CCDF plot
Figure 9- 8. The CCDF plot
Chapter 9