42 Chapter 3
Making Fault Location Measurements
Basic Measurement Procedures
Figure 3-1 Effect of frequency sweep range on resolution
The sweep range affects the width of the impulse signal and the rise time of the step
signal. The width of the impulse signal and the rise time of the step signal are
inversely proportional to the sweep range. Therefore, the wider the sweep range is,
the shorter these times are.
The resolution is equal to the width defined at the point of 50% of the impulse signal
or the rise time defined at the points of 10% and 90% of the step signal. (
Figure 3-2)
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