What is this BS EN 61237-3 - Broadcast video tape recorders about?
BS EN 61237-3 discusses broadcast video tape recorders and methods of measurement with a focus on electrical measurements for analogue component video signals. BS EN 61237-3 is the third part of the BS EN 61237 multi-series on broadcast video tape recorders that describes the test signals and measurement methods for equipment mainly dedicated to record/playback of analogue component TV signals on magnetic tape on reels or in cassettes.
BS EN 61237-3 applies to measuring methods for general use in television production and transmission. The allowable tolerances for the rated values for acceptable performance are not given in BS EN 61237-3 but are derived from appropriate system specifications, manufacturers’ specifications, etc. The necessary reference and calibration tapes are either mentioned in the specific IEC Publication of the equipment under test or included in IEC 1105 (reference tapes) and IEC technical report 1295 (calibration tapes).
The methods are applicable to acceptance tests, performance comparisons and as far as possible, routine checks.
Who is BS EN 61237-3 - Broadcast video tape recorders for?
BS EN 61237-3 on broadcast video tape recorders is useful for:
- Video production technicians
- Video producers
- Recording and dubbing studios
- Television manufacturers
Why should you use BS EN 61237-3 - Broadcast video tape recorders?
The luminance bar amplitude error is the difference between the actual luminance bar amplitude and its nominal value, expressed as a percentage of the nominal value. The sign of the error is positive if the bar amplitude is greater than the nominal value.
BS EN 61237-3 discusses test conditions, measuring methods and test signals, measurement of characteristics, luminance bar amplitude error, synchronizing pulse amplitude error, and bar tilt.
BS EN 61237-3 helps to describe the methods of measurement, test signals and procedures that is applied to characteristics of video recording/playback machines mainly intended for professional use.
