Amplitude (AM) and frequency modulation (FM) techniques (AQA A-Level Physics): Flashcards

Process of making a signal suitable for its transmission medium

Information signal shape dictates carrier wave amplitude

Information signal amplitude defines carrier wave frequency

$2f_m$

$2(Delta f + f_m)$

$f_c + f_m$

$f_c - f_m$

FM less susceptible to noise; noise affects amplitude which remains constant in FM

Requires more bandwidth than AM

$2 \times \text{maximum available bandwidth}$