IRE (Institute of Radio Engineers)
IRE (Institute of Radio Engineers) – a) The composite analog television signal’s amplitude can be described in volts or IRE units with 140 IRE representing a full amplitude composite analog signal. The 0 IRE point is at blanking level, with sync tip at -40 IRE and white extending to +100 IRE In the studio, the composite analog video signal is typically 1 volt in amplitude. Thus in the studio, 1 IRE is equal to 1/140 of a volt or 7.14 mV. IRE stands for Institute of Radio Engineers, the organization which defined the unit. b) Unit of video measurement. 140 IRE measures the peak-to-peak amplitude of the video signal (including sync) and is typically 1 volt.
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