EN 61120-4:1992

Foreword
1 Scope
2 Normative references
3 Definitions
  3.1 Flux transitions
  3.2 Physical recording density
  3.3 Test density
  3.4 Recording current wave form
  3.5 Recording current peak-to-peak value
  3.6 Recommended recording current
  3.7 Reference recording current
  3.8 Test recording current
  3.9 Average signal level
  3.10 Standard reference level
4 Technical requirements and test conditions
  4.1 Standard atmospheric conditions
  4.2 Mechanical characteristics of test equipment
  4.3 Electrical characteristics of test equipment
  4.4 Reference tapes
  4.5 Condition of the tape to be tested
5 Electrical parameters to be measured
  5.1 Resolution
  5.2 Overwrite characteristic
  5.3 Drop-outs
  5.4 Relative average signal level to noise ratio
  5.5 Characteristics of the sub-tracks in case of bias-recording
6 Recommended parameters to be described in published data for
  professional digital audio tapes
7 Mechanical parameters to be measured
Annex A - Name and address of the manufacturer of primary standard
          IEC reference tapes
Annex ZA (normative) Other International Publications quoted
                     in this standard with the references
                     of the relevant European publications
Figures

Applies to methods of measurement for the properties of magnetic tapes used in digital audio reel-to-reel recording and reproducing systems using 6,3 mm magnetic tape for professional use.