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Proposal from the secretary of SC 86B: IEC 61300-3-31: Examinations and measurements - Coupled power ratio measurement for fibre optic sources

IEC 61280-2-2 Ed. 4.0: Fibre optic communication subsystem test procedures - Part 2-2: Digital systems - Optical eye pattern, waveform and extinction ratio measurement

IEC 62558 Ed.1: Ultrasonics - Real-time pulse-echo scanners - Phantom and method for automated evaluation and periodic testing of 3-D distributions of signal-to-noise ratio using voids

IEC 62558 Ed.1: Ultrasonics -Real-time pulse-echo scanners- Phantom with cylindrical, artificial cysts in Tissue-Mimicking Material and method for evaluation and periodic testing of 3D-distributions of VDR (void-detectability ratio)

IEC 61788-4 ED.3: Superconductivity - Part 4: Residual resistance ratio measurement - Residual resistance ratio of Nb-Ti composite superconductors

IEC 61788-11 Ed.2: Superconductivity - Part 11: Residual resistance ratio measurement - Residual resistance ratio of Nb3Sn composite superconductors

IEC 61788-12 Ed.2: Superconductivity - Part 12: Matrix to superconductor volume ratio measurement - Copper to non-copper volume ratio of Nb3Sn composite superconducting wires

Reciprocating internal combustion engines - Measurement method for exhaust silencers - Sound power level of exhaust noise and insertion loss using sound pressure and power loss ratio

Committees

IEC/TC 90/WG 4

Test method for residual resistivity ratio of Cu/Nb-Ti and Nb3Sn composite superconductors

Superconductivity - Part 12: Matrix to superconductor volume ratio measurement - Copper to non-copper volume ratio of Nb3Sn composite superconducting wires

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