This test is not easy for ordinary people who do not know much about mountings and diamonds. This test is not easy and does not assure a reliable result, especially if the cracks are hidden behind the mountings.
Testing at multiple wavelengths should always be performed as it is the best way to ensure that you'll find bends or cracks in the fiber. Even if the application will only use the lower wavelength for transmission, when troubleshooting with your OTDR, it's best to test at both 850 and 1300nm for mutimode and 1300 and 1550 for singlemode. Normally, the higher wavelength would show a lower loss, but if the fiber is stressed, the higher wavelength will show significantly higer loss, and the problem will be easier to detect. Note that the wavelengths are "bound", meaning that the wavelengths noted above are sufficient for testing even if other wavelengths will be used in operation. If the problem is located at a splice-on pigtail, you may need a VFL to determine if the problem is a cracked or kinked fiber rather than the pigtail connector as the event on the trace will typically show up at about the distance to the connector. OptiFiber Pro features a handy built-in VFL for just this sort of situation.
They jolted to a stop, and Amory peered up, startled. A woman was standing beside the road, talking to Alec at the wheel. Afterward he remembered the harpy effect that her old kimono gave her, and the cracked hollowness of her voice as she spoke:
Isabelle and her mother drove into town at four, and they rode up smiling Prospect Avenue, through the gay crowd, to have tea at Cottage. The clubs had their annual dinners that night, so at seven he loaned her to a freshman and arranged to meet her in the gymnasium at eleven, when the upper classmen were admitted to the freshman dance. She was all he had expected, and he was happy and eager to make that night the centre of every dream. At nine the upper classes stood in front of the clubs as the freshman torchlight parade rioted past, and Amory wondered if the dress-suited groups against the dark, stately backgrounds and under the flare of the torches made the night as brilliant to the staring, cheering freshmen as it had been to him the year before. 2b1af7f3a8