Agilent Technologies E8247C PSG CW - Manual (Page 192)

182 Chapter 9
Two-Tone Waveform Generator
Creating, Viewing, and Modifying Two-Tone Waveforms
Figure 9-2
To View a Two-Tone Waveform
This procedure describes how to configure the spectrum analyzer to view a two-tone waveform and its IMD
products. Actual key presses will vary, depending on the model of spectrum analyzer you are using.
1. Preset the spectrum analyzer.
2. Set the carrier frequency to 20 GHz.
3. Set the frequency span to 60 MHz.
4. Set the amplitude for a 10 dB scale with a 4 dBm reference.
5. Adjust the resolution bandwidth to sufficiently reduce the noise floor to expose the IMD products. A 9.1
kHz setting was used in our example.
6. Turn on the peak detector.
7. Set the attenuation to 14 dB, so you’re not overdriving the input mixer on the spectrum analyzer.
You should now see a two-tone waveform with a 20 GHz center carrier frequency that is similar to the one
shown in
Figure 9-3 on page 183 . You will also see IMD products at 10 MHz intervals above and below the
generated tones, and a carrier feedthrough spike at the center frequency with carrier feedthrough distortion
products at 10 MHz intervals above and below the center carrier frequency.