pulse - amplitude modulation - frequency modulation

pulse - amplitude modulation - frequency modulation

[′pəls ¦am·plə‚tüd ‚mäj·ə‚lā·shən ′frē·kwən·sē ‚mäj·ə‚lā·shən]
(communications)
System in which pulse-amplitude-modulated subcarriers are used to frequency-modulate a second carrier; binary digits are formed by the absence or presence of a pulse in an assigned position.