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Ríomhairí, Ríomheolaíocht Modh tarchurtha comharthaí ina seasann dhá mhinicíocht (ton) ar leith don 1 agus don 0. Tugtar ar an minicíocht athrú ag amanna tábhachtacha trí thrasdula réidh chomh maith le trasdula groda. Go hiondúil seasann minicíocht amháin do 1-ghiotán, agus minicíocht eile do 0-ghiotán.
Computers, Computer Science A form of signal transmission in which the 1 and the 0 are represented by two distinct frequencies (tones). Frequency is made to vary at significant times by smooth, as well as abrupt, transitions. Typically a 1-bit is represented as one frequency, and a 0-bit as another frequency.