The sample population is divided as equally as possible into three specimen groups. Eachgroup is mounted in a holding fixture (e.g. adapter panel) at the following distances from thefloor: 0,9 m, 1,4 m and 1,8 m.For each connector pair, perform an initial cleaning and record baseline optical measurements(e.g. attenuation, return loss). For each connector pair, perform optical measurements onevery 25 th mating. Clean only the cycled connector prior to every 25 th mating. Clean bothconnectors prior to every 50 th mating. The following sequence is an example: