dibit

A dibit is a related group of two bits. A dibit represents four digital states (`2^2`): 00, 01, 10 and 11.

Dibits are used for control purposes and in modulation methods, for example for the four phases of phase shift keying( PSK), quadrature phase shift keying( QPSK) or in pulse amplitude modulationPAM5.

Binary units and their valences

If three bits are combined to form a group, this is referred to as a tribit; if four bits are combined, this is referred to as a quadbit, nibble or half- byte; if 8 bits are combined, this is referred to as a byte.