The following steps are taken during the identification of fiber optic link problems with the visual fault locator. An Overview of Fiber Optic Visual Fault Locator A visual fault locator is a pen-like device that works with a laser and is designed to locate errors on a fiber link. It can be used to analyze the fiber network at locations such as splice points, connector link, and across the entire length of fiber cable. It can be used in a continuous laser detection mode or in flash mode, depending on the type of analysis being performed.
The visual flaw detector can only be used on fiber optic solutions in the field. Therefore, the first step is to test the transaction point by directing the laser pointer towards the connection location. The transaction point is where the connector meets the cable. Identify the presence of external optical energy, if any. If there is no external influence, test the splice connection. Check if the cable is spliced incorrectly, if not, find the following location. Slide the visual fault locator along the fiber cable. However, experienced fiber optic network testers can use a logical approach to locate a potential area of failure. Otherwise, the cable must be thoroughly tested. Along the entire length, check for fiber cuts, loss of signal intensity, etc. If loss of signal strength is identified in one location, the fiber should be tested for another 20 to 30 miles. If signal break traces cannot be indicated with the fault locator, the use of a time domain reflectometer may be required in extreme cases.