Editing List of BBC test cards (section)

==Test Card H==
[[File:BBC Test Card H.jpg|thumb|upright=0.8|Test Card H]]
Test Card H was designed as a line up chart for cameras in-studio, possibly to test [[chrominance|chroma]] specifications as well as [[display resolution|resolution]] and [[bandwidth (signal processing)|bandwidth]]. The "H" designation was solely used for this chart, and was therefore never allocated to a Test Card used for broadcasting; following this, the letter "I" was also passed over as a Test Card letter, having been considered too similar to the number "1", therefore leading to Test Card J being the next in the series.<ref name="Barney-wol.net">{{cite web |title=Test Card J |publisher=Barney-wol.net |date=29 March 2000 |url=http://www.barney-wol.net/video/testcardj/testcardj.html |archive-url=https://archive.today/20070701213757/http://www.barney-wol.net/video/testcardj/testcardj.html |url-status=dead |archive-date=1 July 2007 |accessdate=14 August 2009 }}</ref>