Testing involves visual inspection of terminations with a microscope, tracing fibers visually and finding faults, measuring optical power and loss with power meters and light sources, testing with OTDRs and testers for special issues in long distance links. Fiber optic systems include both passive components and active electronics. System performance is typically evaluated on an individual link basis between any two given nodes of the. Fiber Optic Testing Testing is used to evaluate the performance of fiber optic components, cable plants and systems. As the components like fiber, connectors, splices, LED or laser sources, detectors and receivers are being developed, testing confirms their performance specifications and helps. this document is the property of JDSU. No part of this book may be reproduced or utilized in any form or means, electronic or mechanical, including photocopying, recording, or by any information storage and retrieval system, without pe n optical fiber to a distant receiver. An Optical Power Meter and Laser Light Source will be used to measure power loss on each completed ring or distribution span to verify continuity between fibers (no fibers incorrectly spliced. After all fiber optic cables are installed, spliced and terminated, they must be tested. For every fiber optic cable plant, you generally need to test for continuity and polarity, end-to-end insertion loss, verify installation with an OTDR and then troubleshoot any problems on every fiber in every.