• BS EN 61237-4:1998

    Current The latest, up-to-date edition.

    Broadcast video tape recorders. Methods of measurement Analogue audio performance measurements

    Available format(s):  Hardcopy, PDF

    Language(s):  English

    Published date:  15-02-1998

    Publisher:  British Standards Institution

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    Table of Contents - (Show below) - (Hide below)

    1 General
        1.1 Scope and object
        1.2 Normative references
        1.3 Definitions
    2 Manual and automatic measurements
    3 Procedure of measurement
    4 Environmental conditions
    5 Measurements on analogue audio baseband recording
        using bias
        5.1 Reproducing performance using calibration tape
        5.2 Overall performance using reference tape
    6 Measurement on analogue audio recording using
        frequency modulation (FM audio)
        6.1 Reproducing performance using calibration tape
        6.2 Overall performance using reference tape
    7 Special measurements
        7.1 Measurements on FM carrier (unmodulated carrier
              and deviation)
        7.2 Measurements on AGC (amplitude characteristic;
              attack time; hold time)
        7.3 Measurements on switchable noise reduction circuits
        7.4 Measurements on non-switchable noise reduction
              systems (in combination with a non-switchable AGC)
        7.5 Polarity test
    Annexes
    A Method of measurement for magnetic tape flux
    B Bibliography
    ZA (normative) Normative references to international
       publications with their corresponding European publications

    Abstract - (Show below) - (Hide below)

    Describes methods of measurement and test signals for the analogue audio part of equipment for recording/reproduction of TV signals on magnetic tape reels or cassettes.

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    Committee EPL/48
    Development Note Also numbered as IEC 61237-4 Supersedes 93/216468 DC (11/2005)
    Document Type Standard
    Publisher British Standards Institution
    Status Current
    Supersedes

    Standards Referencing This Book - (Show below) - (Hide below)

    IEC 60268-8:1973 Sound system equipment - Part 8: Automatic gain control devices
    HD 483.3 : 200S2 SOUND SYSTEM EQUIPMENT - AMPLIFIERS
    EN 61041-3:1995 Non-broadcast videotape recorders - Methods of measurement - Part 3: Audio characteristics for FM recording
    IEC 60268-3:2013 Sound system equipment - Part 3: Amplifiers
    ANSI S4.6 : 82(R1992) RECORDED FLUX OF MAGNETIC SOUND RECORDS AT MEDIUM WAVELENGTHS, METHOD OF MEASURING
    HD 574 : 1990 TYPE B HELICAL VIDEO RECORDERS
    EN 60094-3:1996/A3:1996 MAGNETIC TAPE SOUND RECORDING AND REPRODUCING SYSTEMS - PART 3: METHODS OF MEASURING THE CHARACTERISTICS OF RECORDING AND REPRODUCING EQUIPMENT FOR SOUND ON MAGNETIC TAPE
    EN 61105:1993 Reference tapes for video tape recorder systems
    EN 61041-1 : 1995 Non-broadcast video tape recorders - Methods of measurement - Part 1: General video (NTSC/PAL) and audio (longitudinal) characteristics
    IEC TR 61295:1994 Calibration tapes for broadcast VTRs
    IEC 61213:1993 Analogue audio recording on video tape - Polarity of magnetization
    IEC 61041-3:1993 Non-broadcast video tape recorders - Methods of measurement - Part 3: Audio characteristics for FM recording
    IEC 60094-2:1994 Magnetic tape sound recording and reproducing systems - Part 2: Calibration tapes
    IEC 61105:1991 Reference tapes for video tape recorder systems
    HD 483.1 : 200S2 SOUND SYSTEM EQUIPMENT - GENERAL
    IEC 60268-1:1985 Sound system equipment. Part 1: General
    EN 61213:1994 Analogue audio recording on video tape - Polarity of magnetization
    IEC 60094-3:1979 Magnetic tape sound recording and reproducing systems - Part 3: Methods of measuring the characteristics of recording and reproducing equipment for sound on magnetic tape
    EN 60651:1994/A2:2001 SOUND LEVEL METERS (IEC 60651:1979/A2:2000)
    IEC 61260:1995 Electroacoustics - Octave-band and fractional-octave-band filters
    DIN 45520:1973-01 MAGNETIC TAPE RECORDERS - MEASUREMENT OF THE ABSOLUTE LEVEL OF THE MAGNETIC FLUX AND ITS FREQUENCY RESPONSE ON MAGNETIC TAPES
    HD 483.2 : 200S2 SOUND SYSTEM EQUIPMENT - EXPLANATION OF GENERAL TERMS AND CALCULATION METHODS
    EN 61260:1995/A1:2001 ELECTROACOUSTICS - OCTAVE-BAND AND FRACTIONAL-OCTAVE-BAND FILTERS
    IEC 60651:1979+AMD1:1993+AMD2:2000 CSV Sound level meters
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