Indian-Head Test Pattern - Classic Analog Television Calibration Image #2310140 (License: Personal Use)

This black-and-white test pattern features a central circular target with grayscale wedges, radial lines, and numerical markings (e.g., -20, -30, -35, -45) for luminance and resolution testing. At the top center sits a stylized illustration of a Native American chief in a feathered headdress, flanked by four corner targets and precise measurement guides (e.g., 325, 575, 300, 50 units). Designed for analog NTSC television systems, it enabled engineers to adjust contrast, brightness, geometry, and focus during station sign-on or maintenance.

Used historically by TV stations during off-air hours or before programming began; now featured in media history articles, retro tech exhibits, and vintage broadcasting documentation to illustrate early television engineering practices.