YD/T 7065-2026Optical Time Domain Reflectometer (OTDR) (English PDF)

YD/T 7065-2026 is the English-translated version of 光时域反射仪（OTDR）.

The document defines the terms and definitions for optical time domain reflectometers (OTDR) and describes their structure and working principle. It specifies the classification, functions, optical performance, data storage and export, interfaces, safety, environmental performance, electromagnetic compatibility, power supply adaptability and restricted substance content, describes the corresponding test methods, and specifies inspection rules, marking, packaging, transport and storage. It applies to the production, use and acceptance of OTDRs that measure the attenuation characteristics of class B single-mode fibre and class A1 multimode fibre.

It is used by instrument manufacturers, test laboratories, and telecommunication operators and contractors who buy and use OTDRs. It is a voluntary standard issued by the Ministry of Industry and Information Technology on 1 June 2026 and effective from 1 September 2026. It is a new standard.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

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