These charts have an overall size of 12.5" x 10". Parallel bar pattern for precise measurement of frequency response and roll-off in video systems. Covers 0.5 to 4.0 Mhz. equivalent video bandwidth. (40 to 320 TV lines). Similar to multi-burst patterns produced by electronic test generators. Chart can be underscanned to produce 1.0 to 8.0 Mhz. range (80 to 640 TV lines) for computer and other high resolution applications.