National Instruments 370753C-01 Manual De Usuario

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Chapter 5
Classical Feedback Analysis
5-18
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Figure 5-7.  Nyquist Plot of the Open-Loop System for Frequencies 
from 0.01 Hz to 10 Hz
Figure 5-8.  Nyquist Plot of the Open-Loop System for Frequencies 
from 0.5 Hz to 5 Hz