BS EN 61237-4:1998

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

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.