Editing List of BBC test cards (section)

==Test Card B==
[[File:BBCtestcardb.png|thumb|upright=0.7|Test Card B (generic reconstruction)]]
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Test Card B was an early BBC television test card. It was very similar to Test Card A and also only broadcast as engineering tests.<ref name=":1" /> The original card has since gone missing. The only differences were that the frequency bars were juxtaposed, the values were deleted, and an [[Ilford Photo|Ilford]] Panchromatic Response Chart placed below the circle where the letter box had been, the letter box in Test Card A was moved to the top of the card replacing the vertical resolution test.<ref name="meldrum">{{cite web |date=29 March 2000 |title=BBC Test Cards |url=http://www.meldrum.co.uk/mhp/testcard/bbc_test.html |accessdate=14 August 2009 |publisher=Meldrum}}</ref><ref name=":1" />