List of BBC test cards
The following is a list of test cards used by the BBC at various points in broadcasting. == Tuning Signals == The first "Tuning Signals" test card was broadcast by the BBC in 1934.
The following is a list of test cards used by the BBC at various points in broadcasting. == Tuning Signals == The first "Tuning Signals" test card was broadcast by the BBC in 1934.
The following is a list of test cards used by the BBC at various points in broadcasting. == Tuning Signals == The first "Tuning Signals" test card was broadcast by the BBC in 1934.
Source: Wikipedia "List of BBC test cards" · CC BY-SA 4.0
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