70 Chapter2
Making Measurements
Example 4: Harmonic Distortion
Figure 2-17 Harmonic Distortion in dBc (marker threshold set to −70 dB)
Find the harmonic distortion (method 1)
The difference in amplitude between the fundamental and second
harmonic shown in the figure is about −50 dB, or 0.33 percent harmonic
distortion (see Figure 2-18).
1. To measure the third harmonic, press
NEXT PK RIGHT again.
Measure additional harmonics
1. Continue reading amplitudes and comparing them to Figure 2-18 for
each additional harmonic you want to measure.
PEAK EXCURSN
defines what is and what is not a peak; the next-peak routines find
the corresponding peak.
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