Skip to content

Course home

x
Sign up
x

Why we modulate

Why we modulate

Voice, music, and many data signals are low frequency, typically from about 20 Hz20 \, \text{Hz}20Hz to 20 kHz20 \, \text{kHz}20kHz. Such signals are poor candidates for direct radio transmission, so a high-frequency carrier wave is used instead.

Amplitude (AM) and frequency modulation (FM) techniques (A-level only) Lesson

  1. A Level
  2. /Physics
  3. /Amplitude (AM) and frequency modulation (FM) techniques (A-level only)

Step-by-step lessons on AQA A Level Physics Amplitude (AM) and frequency modulation (FM) techniques (A-level only). Each one builds up to exam-style questions. Physics is one of the most mathematically demanding A Levels -- at least 40% of the marks require maths skills at Level 2 (GCSE) standard or above, so build calculation and graph-handling fluency alongside the conceptual content from the start.

Lessons