IEC 61120-4:1992

Foreword
Clause
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
Figures
Annex A (informative) Name and address of the
        manufacturer of primary standard IEC reference
        tapes

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.