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186 Chapter 8
Multitone Waveform Generator
Creating, Viewing, and Optimizing Multitone Waveforms
Creating, Viewing, and Optimizing Multitone Waveforms
This section describes how to set up, generate, and optimize a multitone waveform while viewing it
with a spectrum analyzer. Although you can view a generated multitone signal using any spectrum
analyzer that has sufficient frequency range, an Agilent Technologies PSA high-performance spectrum
analyzer was used for this demonstration. Before generating your signal, connect the spectrum
analyzer to the signal generator as shown in Figure 8-1.
Figure 8-1 Spectrum Analyzer Setup
To Create a Custom Multitone Waveform
Using the Multitone Setup table editor, you can define, modify and store user-defined multitone
waveforms. Multitone waveforms are generated by the dual arbitrary waveform generator.
1. Preset the signal generator.
2. Set the signal generator RF output frequency to 20 GHz.
3. Set the signal generator RF output amplitude to 0 dBm.
4. Press
Mode > Multitone > Initialize Table > Number of Tones > 9 > Enter.
5. Press
Freq Spacing > 1 > MHz.
6. Press
Initialize Phase Fixed Random to Random.
7. Press
Done.
8. Press
Multitone Off On to On.
9. Turn on the RF output.
The multitone signal should be available at the signal generator RF OUTPUT connector.
Figure 8-2 shows what the signal generator display should look like after all steps have been
completed. Notice that the M-TONE, I/Q, RF ON, and MOD ON annunciators are displayed and the
parameter settings for the signal are shown in the status area of the signal generator display. The
multitone waveform is stored in volatile ARB memory.