Definition: | 1. an assembly, obtained by frequency division multiplexing, of a specified number of mastergroups, normally 3, in adjacent positions in a frequency band of specified width with guard bands between adjacent mastergroups
2. a frequency band of standardized width, 3 872 kHz, in a multichannel carrier system and occupying one of a number of specified positions in the spectrum
NOTE 1 – A supermastergroup is normally an assembly of 900 FDM telephone channels.
NOTE 2 – Signals, other than those derived from an assembly of mastergroups but having specified characteristics, may occupy the whole or a part of a frequency band normally assigned to a supermastergroup.
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