328 Chapter 8
Frequency-Offset Measurement (Option 008)
Measurement of Harmonic Distortion
4. Harmonic Distortion Measurement
Harmonic distortion is a typical measurement parameter of nonlinear devices such as
mixers and amplifiers. As shown in
Figure 8-13, the second and third distortions increase
by square and cube values of the fundamental signal, respectively. Thus the distortion
component increases as a function of the fundamental signal power, and the harmonic
distortion can be measured as the proportion of the 2nd and 3rd harmonic power levels to
the fundamental signal power level.
Figure 8-13 Harmonic distortion
Connection of DUT
Connect the DUT, as shown in Figure 8-14.
R3 (n) Absolute measurement in Port 3, reference receiver
R4 (n) Absolute measurement in Port 4, reference receiver
*1. n in the parentheses is the stimulus port number.
Softkey
*1
Function
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