Episode 3 · FM · Series 02: RF principles

Why does FM sound clean?

Coming soon

Release: Nov 13, 2026
Length: 3:37
Subject: Modulation

What it covers

How FM radio works: the deviation, the sidebands, Carson's rule, the limiter and the discriminator. With a real voice on AM and on FM, with the same power and the same noise.

Operate it in the lab: Riding the Wave

Chapters

0:00What is FM?
0:23How does the transmitter make it?
0:47The FM signal by frequency
1:19How does the receiver get the voice back?
1:41Why does FM sound clean?
1:59A real voice, with real noise
2:40What if the signal is weak?
3:09AM, SSB or FM?

Frames from the draft

FM: How does the transmitter make it? — 02 How does the transmitter make it?

FM: The FM signal by frequency — 03 The FM signal by frequency

FM: How does the receiver get the voice back? — 04 How does the receiver get the voice back?

FM: Why does FM sound clean? — 05 Why does FM sound clean?

FM: A real voice, with real noise — 06 A real voice, with real noise

FM: What if the signal is weak? — 07 What if the signal is weak?