unidirectional pulse-amplitude modulation

unidirectional pulse-amplitude modulation

[¦yü·nə·də′rek·shən·əl ¦pəls ¦am·plə‚tüd ‚mäj·ə′lā·shən] (communications) Modulation of pulse-amplitude type in which all pulses rise in the same direction. Also known as single-polarity pulse-amplitude modulation.