Test patterns

Television Graphics Around the World "A small selection of Test Cards and graphics from around the world, featuring Australia, Singapore, Ireland, Sweden and North America"
Test Card Gallery

ELECTROMUSICATIONS from Transdiffusion, Dedicated to British television and radio presentation and history

Broadcasting101 - he's got to get a faster server

WWW Test Pattern

DisplayMate Demo Test Pattern Images

The Test Pattern List, v2.04

GEKCO VIDEO TEST PATTERN GENERATORS
video tutorial