Agilent Technologies E8267D PSG, E8257D PSG Creating, Viewing, and Optimizing Multitone Waveforms

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.

186 Chapter 8