Agilent Technologies E8267C PSG Manual de usuario Pagina 1

AgilentTwo-tone and Multitone Personalitiesfor the E8267C PSG Vector Signal GeneratorApplication Note 1410Generating two-tone and multitone signals at

10Figure 8. Generating multitone signals using an I/Q modulator1.Notice that when a modulating waveform is fed to the in-phase (I) path and zero is fe

11Because the signals are implemented digitally using the internal baseband generator, relative tone spacing, relative tone power, and initial tone ph

12Analog Test Stimulus Versus Vector Test StimulusThe following points summarize the main benefits, as well as the drawbacks, associatedwith employing

13Accurate and meaningful test results – A series of multitone signals with random phasesets are required to adequately simulate real world operating

14The PSG Vector Signal Generator Two-tone and Multitone PersonalitiesFundamentally, both the two-tone and multitone personalities operate in a simila

15Two-tone personalityTwo-tone signals are the most widely used for analyzing nonlinear distortion. The PSGtwo-tone personality provides a streamlined

16Multitone personalityThe PSG multitone personality provides a full featured, flexible configuration menu for multitone signals ranging from 2 to 64

Figure 12. Multitone signals to test for in-band and out-of-band distortion.The peak to average characteristics of the signal can also quickly be dete

18SpecificationsTwo-toneIM distortion250 kHz to 3.2 GHz <–45 dBc for RF levels < 0dBm (typical)>3.2 GHz to 20 GHz <–55 dBc for RF levels

19ConnectivityThe E8267C PSG vector signal generator offers a wide array of I/O capabilities to simplifymeasurement setups. You can perform firmware u

2What is IMD? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3How is IMD

Agilent Technologies’ Test and Measurement Support,Services, and AssistanceAgilent Technologies aims to maximize the value youreceive, while minimizin

3What is IMD?Two-tone and multitone signals are used extensively in the communications industry totest for nonlinear distortion at the component, devi

4How is IMD Characterized?OverviewIMD is measured by examining the output of a device under test (DUT) with a spectrumanalyzer while the DUT is being

Figure 3a. Figure 3b. When summing multiple frequencies, the phase relationships of the frequency components affectthe time-domain profile and peak-to

Random phase set 23rd order IMD-60.22 dB6Generating this signal implies that each discrete tone in the composite test signal isphase aligned so that t

7Because worst-case peak-to-average ratio does not imply worst-case IMD levels andIMD varies considerably depending upon the phase relationships of th

8Figure 6. Conventional analog setup to perform a multitone IMD measurement.Although this approach has been used for many years (primarily due to a la

9Vector Test StimulusRather than summing CW signals from multiple analog signal generators to create multitone signals, an equivalent test stimulus ca