Rewind

The museum of TV ephemera

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FROM THE ARCHIVE OF: Dave Baldwin

In this excerpt from a 1976 Open University programme, some discussion about the uses of the familiar Test Card F pattern.

VIDEO: Open University programme discussing test cards. TX DATE: 1976. COPYRIGHT: BBC. VREF: 24195-01.

Video content

[00:00:00] PROGRAMME: the programme discusses some of the uses of the test card.

Initially, the test card is used to demonstrate the effect of adding an extra path, causing ghosting.

Tests/uses covered:

  • High frequency response.
  • Low frequency response.
  • Non-linear effects on the video signal.
  • The ends of the arrows at the edges of the test card can be used to adjust the size of broadcast picture.
  • Reflection.

RELATED ARTICLE: the history of the BBC trade test transmission.

Acknowledgements

FEATURE IMAGE:
PICTURED: Open University programme discussing test card uses. COPYRIGHT: BBC.

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