ECMA-62

This Standard ECMA-62 specifies the physical and magnetic characteristics of 12,7 mm, 9-track magnetic tape with reel, to enable interchangeability of such tapes. It also provides a format and three recording methods, thus allowing together with Standard ECMA-13 for Magnetic Tape Labeling full data interchange by means of such magnetic tapes.

The three methods defined in this Standard are:

•  NRZ1 at the physical recording density of 32 ftpmm, yielding a data density of 32 cpmm,
•  Phase Encoding at the physical recording density of 126 ftpmm, yielding a data density of 63 cpmm,
•  NRZ1 at the physical recording density of 356 ftpmm, yielding a data density of 246 cpmm when Group Coded Recording is used.