Test Card F
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Test Card F is a test card that was created by the BBC and used on television in the United Kingdom and in countries elsewhere in the world for more than four decades. Like other test cards, it was us
Off-air screen capture of BBC Test Card F, as seen on BBC1 between 17 February 1991 and 4 October 1997. (September 1993 Variant Picture)
Original transparency of the central image created for Test Card F. (1966 Variant)
Philips circle pattern
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The Philips circle pattern refers to a family of related electronically generated complex television station colour test cards. The content and layout of the original colour circle pattern was designe
Test Card F
…seen during engineering work, and was last seen in this role in 2011. The card was also seen on ITV in the 1970s, occasionally used in conjunction with Test Card G. In the digital age, Test Card F and its variants are very infrequently broadcast, as downtime hours in schedules have largely been discontinued. Several…
Philips PM5544 generator (bottom left) used to display test pattern on a CRT television set, connected to a PM6645 frequency counter (topmost left) and PM3400 sampling oscilloscope (bottom right)
Philips PM5544 generator with top lid opened.
![PM5644[G/M/L/P/N/I]/00 - Typical front panel of a 4:3 model.](https://upload.wikimedia.org/wikipedia/commons/thumb/8/87/PM5644_GBG.jpg/500px-PM5644_GBG.jpg)
PM5644[G/M/L/P/N/I]/00 - Typical front panel of a 4:3 model.
PM5644G/924 (PAL 16:9 non-PALplus).