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Measurement of exposure to radio-frequency electromagnetic fields. Field strength in the frequency range 100 kHz to 1 GHz. Original standard BS EN 61566-1998 in PDF full version. Additional info + preview on request

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Methods of measurement for waveguides - Variation of group delay. Original standard BS EN 61580-3-1997 in PDF full version. Additional info + preview on request

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Methods of measurement for waveguides Part 4: Attenuation of waveguide and waveguide assemblies. Original standard BS EN 61580-4-1998 (2008) in PDF full version. Additional info + preview on request

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Methods of measurement for waveguides Part 6: Return loss on waveguide and waveguide assemblies. Original standard BS EN 61580-6-1997 (2000) in PDF full version. Additional info + preview on request

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Multichannel digital audio tape recorder (DATR), reel-to-reel system, for professional use - Format B. Original standard BS EN 61595-2-1998 in PDF full version. Additional info + preview on request

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Transmission of audio and/or video and related signals using infra-red radiation - Transmission systems for audio signals for conference and similar systems. Original standard BS EN 61603-3-1998 in PDF full version. Additional info + preview on request

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