test card
Appearance
See also: testcard
English
[edit]![](http://upload.wikimedia.org/wikipedia/commons/thumb/9/9f/Snellen_chart.svg/220px-Snellen_chart.svg.png)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/6/66/SMPTE_Color_Bars.svg/220px-SMPTE_Color_Bars.svg.png)
Noun
[edit]test card (plural test cards)
- (optometry) A card printed with various letters or symbols, used in testing vision.
- Synonym: Snellen chart
- (UK, television) A test signal, typically broadcast at times when the transmitter is active but no programme is being broadcast (often at startup and closedown).
- Synonym: test pattern
Translations
[edit]vision test card
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broadcast test signal
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