Episode 7 · Sampling and Aliasing · Series 02: RF principles

How many samples are enough?

A frame from the draft of episode 7, Sampling and Aliasing

Coming soon

Release: Dec 11, 2026
Length: 2:36
Subject: Sampling

What it covers

How a computer takes in a radio signal, why the limit is half the sample rate, and what an alias is. With a real tone that folds back and a real voice with and without the filter in front.

Chapters

0:00From a wave to numbers
0:18How many samples are enough?
0:39Above the limit
1:03The spectrum folds
1:24The filter in front
1:46Hear the fold
2:20In a software radio

Frames from the draft

Sampling and Aliasing: From a wave to numbers — 01 From a wave to numbers

Sampling and Aliasing: How many samples are enough? — 02 How many samples are enough?

Sampling and Aliasing: Above the limit — 03 Above the limit

Sampling and Aliasing: The spectrum folds — 04 The spectrum folds

Sampling and Aliasing: The filter in front — 05 The filter in front

Sampling and Aliasing: Hear the fold — 06 Hear the fold

Sampling and Aliasing: In a software radio — 07 In a software radio