Test Card X is a BBC

BBC

The British Broadcasting Corporation is a British public service broadcaster. Its headquarters is at Broadcasting House in the City of Westminster, London. It is the largest broadcaster in the world, with about 23,000 staff...

 testcard, used on the BBC HD channel

BBC HD

BBC HD is a high-definition television network provided by the BBC. The service was initially run as a trial from 15 May 2006 until becoming a full service on 1 December 2007...

, designed for 1080 line

1080p

1080p is the shorthand identification for a set of HDTV high-definition video modes that are characterized by 1080 horizontal lines of resolution and progressive scan, meaning the image is not interlaced as is the case with the 1080i display standard....

 vision. It includes a picture of Carole Hersee

Carole Hersee

Carole Hersee is a costume designer who is best known for appearing in the centrepiece of the iconic United Kingdom television Test Card F, which aired on BBC Television from 1967 to 1998 and was revived in 2009...

 and Bubbles the clown, which also appears on the BBC testcards Test Card F

Test Card F

Test Card F is a test card that was created by the BBC and used on television in the United Kingdom and in countries elsewhere in the world for more than four decades...

, Test Card J

Test Card J

Test Card J is a test card, an image used to determine the quality of a broadcast television picture. It is an updated version of Test Card F, which was created by BBC engineer George Hersee, and is used to test analogue television signals...

 and Test Card W

Test Card W

Test Card W is a test card, an image used to determine the quality of a broadcast television picture. It is an updated 16:9 widescreen version of Test Card F, which was created by BBC engineer George Hersee. Test Card W is similar to Test Card J, the latter being a 4:3 version...

. The testcard can be viewed every two hours as part of the BBC HD preview slot. The testcard, when viewed, is enhanced with 5.1 surround sound tests. Certain beeps at different frequencies are made from each of the different surround sound speakers, with markers (such as FL, FL, RL, RR) appearing inside some of the grey boxes of the testcard.

See also

• List of test cards
• Test Card F
  Test Card F
  Test Card F is a test card that was created by the BBC and used on television in the United Kingdom and in countries elsewhere in the world for more than four decades...
  
  
• Test Card J
  Test Card J
  Test Card J is a test card, an image used to determine the quality of a broadcast television picture. It is an updated version of Test Card F, which was created by BBC engineer George Hersee, and is used to test analogue television signals...
  
  
• Test Card W
  Test Card W
  Test Card W is a test card, an image used to determine the quality of a broadcast television picture. It is an updated 16:9 widescreen version of Test Card F, which was created by BBC engineer George Hersee. Test Card W is similar to Test Card J, the latter being a 4:3 version...
  
  
• Carole Hersee
  Carole Hersee
  Carole Hersee is a costume designer who is best known for appearing in the centrepiece of the iconic United Kingdom television Test Card F, which aired on BBC Television from 1967 to 1998 and was revived in 2009...