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Making Measurements
Measuring Magnitude and Insertion Phase Response
Figure 1-4 Example Insertion Phase Response Measurement
The phase response shown in Figure 1-5 is undersampled; that is, there is more than 180 phase delay
between frequency points. If the 180, incorrect phase and delay information may result. Figure 1-5
shows an example of phase samples being with
less than 180 and greater than 180.
Figure 1-5 Phase Samples
Undersampling may arise when measuring devices with long electrical length. To correct this problem, the
frequency span should be reduced, or the number of points increased until is less than 180 per point.
Electrical delay may also be used to compensate for this effect (as shown in the next example procedure).
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