A large fiber optic system is presently being installed at Vandenberg Air Force Base (VAFB) for the transmission of data, telemetry, control, and video signals between various MX-missile flight testing facilities. The fiber optic system utilizes some 80 kilometers of six-and eight-fiber cable, one third of which includes dual-window fiber. Because of the large quantity of cable installed and strict cable plant testing/validation requirements, a good deal of field measurement data is being acquired. Field measurements include: fiber cable receiving inspection testing using an OTDR, end-to-end link attenuation testing at both short and long wavelengths, and end-to-end link bandwidth testing at short wavelength. Special test equipments were designed to provide the end to end link attenuation and bandwidth measurement capabilities. Measurements taken, along with their respective relationship to draft EIA (fac-tory type) procedures, and test results are discussed in detail.