A fiber cable distortion detection system includes a broadband source, an optical source fiber disposed in optical communication with the broadband source, an optical fiber under test (FUT) disposed in optical communication with the optical source fiber and an optical spectrum analyzer disposed in optical communication with the optical source fiber. The system combines the refection of the distortion with the reflection from the source/FUT interface using a 1×2 fiber coupler, the location of the distortion is precisely determined with high resolution by the spectrum of the combined signal. The system is miniaturized to the size of a hand-held device suitable for use in airplane cable plant installation or in an environment where space is limited.