ISO/IEC 13421:1993 Preview
Information technology -- Data Interchange on 12,7 mm, 48-track magnetic tape cartridges -- DLT 1 format
This standard was last reviewed and confirmed in 2010. Therefore this version remains current.
Specifies the physical and magnetic characteristics, to enable interchangeability of the cartridges. Also specifies the quality of the recorded signals, a format - called digital linear tape 1 (DLT 1) - and a recording method.