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Media in category "Test cards" The following 3 files are in this category, out of 3 total. BBC Test Card H.jpg 320 × 240; 10 KB. Testcard c.jpg 325 × 242; 22 KB.
Test Card C [6] was a BBC television test card first broadcast in 1947. [2] It was the first test card to resemble the famous Test Card F. [5] Test Card C allowed adjustment and verification of parameters such as: [7] Aspect Ratio: central circles; Resolution: five gratings corresponding to frequencies of 1.0, 1.5, 2.0, 2.5 and 3.0 MHz
As Televisión Española adopted the PAL colour system in 1975, [4] [5] the test card has specific elements that allow proper colour adjustments. Being a creation of the same team behind the Philips PM5544 test card, [8] [9] it has many elements in common with it (like colour and grey bars or castellations [10]), but introduces some differences (for example, different resolution gratings and ...
In Denmark, where the Philips circle pattern was invented, it was used by its national broadcaster Danmarks Radio (DR) from its launch of regular colour broadcasts in 1970, [132] immediately replacing Test Card F and Philips PM5552, [133] and later on the monochrome Pye Test Card G and Philips PM5540; as well as its first nationwide commercial ...
In continental Europe, [42] another variation known as Telefunken Test Card T05 [43] was used. It had five diagonal bars on the top left of the centre white circle and different resolution wedges reminiscent of the RMA 1946 Resolution Chart. It was also available as individual rolls of test film, particularly in the DACH countries. [17]
The results of many tests using Zener cards fit with a typical normal distribution. Probability predicts these test results for a test of 25 questions with five possible answers if chance is operating: 79.3% of people will get between 3 and 7 correct. 10.9% will get 8 or more correct. One person in 73,700 will get 15 or more correct.
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