UNE EN IEC 61280-4-3:2022
Fibre optic communication subsystem test procedures - Part 4-3: Installed passive optical networks - Attenuation and optical return loss measurements (Endorsed by Asociación Española de Normalización in November of 2022.)
Procedimientos de ensayo para subsistemas de comunicación por fibra óptica. Parte 4-3: Redes ópticas pasivas instaladas. Medición de la atenuación y de la pérdida del retorno óptico. (Ratificada por la Asociación Española de Normalización en noviembre de 2022.)
| Standard number: | UNE EN IEC 61280-4-3:2022 |
| Pages: | 65 |
| Released: | 2022-11-01 |
| Status: | Standard |
UNE EN IEC 61280-4-3:2022
This part of IEC 61280-4 describes the measurement of attenuation, optical return loss and optical power in installed passive optical networks (PON) using single-mode fibre. This document specifies two methods for measuring the attenuation before activation of the PON: " Method A: One-cord method using a light source and a power meter (LSPM); " Method B: Optical time-domain reflectometer (OTDR) method in upstream direction only, with reduction of uncertainties due to the variation of backscatter coefficient. In addition, method C, which is described in informative Annex C, provides an estimate of the attenuation after partial activation of the PON by using a U band filtered optical time-domain reflectometer (FOTDR) in an upstream direction.