Physics · A-Level · AQA · AQA A-level Physics (7408) · Specification point · 3.13.6.4 · Electronics (A-level only) · Data communication systems (A-level only)
Read Notes
Read clear notes for this topic.
Exam Questions
Coming soon
Flashcards
Flip through flashcards to lock it in.
Lesson
Coming soon
Ask Sage
Get help from Sage on this topic.
3.13.6.4 Amplitude (AM) and frequency modulation (FM) techniques (A-level only)
| Content |
|---|
Principles of modulation; bandwidth. Carrier wave and information signal. Details of modulation circuits for modulating a carrier signal with the information signal will not be required. Graphical representation of both AM and FM modulated signals. A detailed mathematical treatment is not required. Students will be expected to identify the carrier frequency and the information frequency from a graph of the variation of signal voltage with time. Bandwidth requirements of simple AM and FM: for AM |
for FM
Data capacity of a channel.
Comparison of bandwidth availability for various media.