Option 100 Fault Location and SRL 4-19
Making SRL Measurements
How to Make and Interpret SRL Measurements
6. Interpret the SRL Measurement
Periodically spaced SRL response bumps will cause frequency spikes at a
frequency given by the following formulas:
The bumps may be located near one end of the cable or somewhere in the
middle. Although the bumps from individual defects may be small, fault
location measurements may be useful to determine the location(s) of the
cable's defect(s).
See Chapter 5, "Making Simultaneous Fault Location and SRL
Measurements" for information on how to perform SRL and fault
location measurements simultaneously.
See “SRL and Periodic Cable Faults” on page 1-10 for more information.
wavelength
c
f
---
≈
c
speed of light
= f frequency=
wavelength
2
------------------------------
spacing between the bumps
=
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