TIA TIA/EIA-455-226

Abstract

This International Standard provides procedures for calibrating single-mode optical time domain reflectometers (OTDRs). It only covers OTDR measurement errors and uncertainties. It does not cover correction of the OTDR response. <br>In order for an OTDR to qualify as a candidate for complete calibration using this standard, it is to be equipped with the following minimum feature set: <br>a) a programmable index of refraction, or equivalent parameter; <br>b)&#160;the ability to present a display of a trace representation, with a logarithmic power scale and a linear distance scale; <br>c) two markers/cursors, which display the loss and distance between any two points on a trace display; <br>d) the ability to measure absolute distance (location) from the OTDR\'s zero-distance reference; <br>e)&#160;the ability to measure the displayed power level relative to a reference level (for example, the clipping level).