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Materials for printed boards and other interconnecting structures - Reinforced base materials, clad and unclad. Base materials for integrated circuit card carrier tape, unclad. Original standard UNE-EN IEC 61249-2-51-2023 in PDF full version. Additional info + preview on request

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Materials for printed boards and other interconnecting structures - Sectional specification set for reinforcement materials. Specification for finished fabric woven from "E" glass for printed boards. Original standard UNE-EN IEC 61249-6-3-2023 in PDF full version. Additional info + preview on request

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Fibre optic communication subsystem test procedures - General communication subsystems. Light source encircled flux measurement method. Original standard UNE-EN IEC 61280-1-4-2023 in PDF full version. Additional info + preview on request

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Amendment 1 - Fibre-optic communication subsystem test procedures - Installed cabling plant. Multimode attenuation measurement. Original standard UNE-EN IEC 61280-4-1-2019 A1-2022 in PDF full version. Additional info + preview on request

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Fibre optic communication subsystem test procedures - Installed passive optical networks. Attenuation and optical return loss measurements. Original standard UNE-EN IEC 61280-4-3-2022 in PDF full version. Additional info + preview on request

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Optical amplifiers. Test methods - Power and gain parameters. Original standard UNE-EN IEC 61290-1-2022 in PDF full version. Additional info + preview on request

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