Snell & Wilcox SW2 and SW4 "Zone Plate" Test Chart (also referred to as Snell & Wilcox Test Pattern) were TV test cards introduced in the 1990s and used with NTSC, PAL and SDTV systems. [1]
Popular versions of the test charts were made available on Laserdisc and DVD-Video, allowing home users and professionals to test and calibrate their equipment. [2] [3] [4] [5] [6] [7] Several broadcast widescreen variations exist. [8] [9] [10] [11]
They were created using equipment like the Snell & Wilcox TPG20/21 Test Pattern Generators. [12] [13]
The Snell & Wilcox Test Chart #2 (or SW2) is used for general adjustments of video processors, mixing equipment, and display devices such as CRT TVs and projectors. Main features and tests allowed by the chart are: [12] [14] [3]
Snell & Wilcox SW2 and SW4 "Zone Plate" Test Chart (also referred to as Snell & Wilcox Test Pattern) were TV test cards introduced in the 1990s and used with NTSC, PAL and SDTV systems. [1]
Popular versions of the test charts were made available on Laserdisc and DVD-Video, allowing home users and professionals to test and calibrate their equipment. [2] [3] [4] [5] [6] [7] Several broadcast widescreen variations exist. [8] [9] [10] [11]
They were created using equipment like the Snell & Wilcox TPG20/21 Test Pattern Generators. [12] [13]
The Snell & Wilcox Test Chart #2 (or SW2) is used for general adjustments of video processors, mixing equipment, and display devices such as CRT TVs and projectors. Main features and tests allowed by the chart are: [12] [14] [3]