The first "Tuning Signals" test card was broadcast by the BBC in 1934. It was a simple line and circle broadcast using Baird's30-line system, and was used to synchronise the mechanical scanning system.[1]
Test Card A
Test Card A made its debut in 1937. However, it and Test Card B were soon replaced by the more useful Test Card C.[2]
Test Card B was an early BBC television test card. It was very similar to Test Card A but was never broadcast, possibly used by BBC engineers for internal use. The original card has since gone missing. The only difference was it had an extra greyscale stripe below the circle.
The letter box in Test Card A was moved to the top of the card.[2]
Test Card C
Test Card C
Test Card C[3] was a BBC television test card first broadcast in 1948. It was the first test card to resemble the famous Test Card F.[2] It was also available as individual rolls of test film in the UK and many Commonwealth countries up until the end of the black-and-white television era.[4][5]
Test Card D
Test Card D was a BBC television test card first broadcast in 1964. This was the first test card to be based on a specification.[6] Later, a "Reduced Power" Test Card D was introduced.[2][7]
Test Card E (later Test Card C)
Modified Test Card C
Test Card E was a television test card designed in 1964 and made to accommodate the 625-line system on BBC2, as opposed to the 405-line system of Test Card D. However, depending on the source, Test Card E was either reported to have lasted for only one day or for up to a month before being withdrawn. Test Card E was thereafter replaced by a modified version of Test Card C, which lasted on BBC2 until 1967 when the colour Test Card F was introduced.[2] The modified Test Card C also aired on BBC1 (with the BBC1 logo replacing the "BBC2 625 LINES" caption) until it was similarly replaced by Test Card F around 1969–1972. Test Card E did however see later usage by RTÉ in Ireland and RTP in Portugal alongside Test Card D.
Test Card F was the BBC's longest-running and most famous test card, featuring Carole Hersee and Bubbles the Clown. There have been many different Test Card F variations.[2] It was first broadcast on 2 July 1967 (the day after the first colour pictures appeared to the public on television) on BBC2.
Test Card G
Test Card G was a television test card broadcast occasionally by the BBC. It was the first electronically generated test card to be broadcast, and was a variant of the Philips PM5544 test card.[2] This test card was generally used by local transmitters for opt outs or during times when a particular region was not showing a programme broadcast from London. It was also used in place of Test Card F nationally from time to time when the projector showing the latter test card's photographic slide was not available or undergoing maintenance until Test Card F was converted to electronic form in 1984.[8] Test Card G was also occasionally used by ITV alongside Test Card F before completely switching over to the ETP-1 test card in 1979.
Another Test Card G, unrelated, was developed by Pye as a monochrome variant on Test Card C. It was used in other countries that use 625-line PAL, such as Bulgaria,[9]Denmark,[10]Luxembourg,[11]ThailandBarbados and Malaysia,[12] but not in Britain.[2] A slightly modified version of the Pye Test Card G was used by YLE in Finland until it switched to the colour Telefunken FuBK test card in the 1970s, as well as in Norway where NRK used it in conjunction with the EIA 1956 resolution chart until it switched to the Philips PM5544, Test Card F and the Telefunken FuBK test cards in the 1970s.[13]
Test Card H
Test Card H
Test Card H was designed as a line up chart for cameras in-studio, possibly to test chroma specifications as well as resolution and 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.[14]
Test Card W is a widescreen update of Test Card F. A predecessor to Test Card W without an identifying letter first appeared in March 1998 as part of digital tests on the Astra 1D satellite, and was notably broadcast to the public on 6 November 1998 as part of a joke on Have I Got News For You to censor then-host Angus Deayton about discussing Peter Mandelson's life. Test Card W is an updated 16:9 (1.78:1) widescreen version of Test Card F. It first appeared in November 1999 alongside Test Card J, with which it bears some similarities. Both aforementioned test cards were designed for the 16:9 (widescreen) ratio.[2][15]
The high-definition version of Test Card W is visually similar but officially lacks a designation letter. This version is often referred to as Test Card X, but this is not a designation which the BBC recognises.[16] It is designed for use on high-definition TV services, & had been included a part of BBC HD's preview loop since November 2008 (though it had been in use internally at the BBC for several years prior) until the channel's closure in March 2013.
Unidentified test card
Recreation of the BBC unnamed electronic test card
An electronically generated image was first broadcast on 21 June 1997 on BBC2 between 3am and 4am. It was also broadcast in October 1997 from 3:29am until 3:44am, when, at the same time, BBC1 showed Test Card G. Both channels reverted over to these at the same time, and reverted to TCF at the same time, as part of a switching test with BBC Birmingham, whereby in the event of a need to evacuate BBC TV to Pebble Mill Studios in Birmingham, such as a power failure as happened in June 2000, a switch would be thrown, putting Birmingham (nowadays Red Bee Media run by two Network Directors simultaneously at MediaCityUK, Salford Quays, Manchester and White City Place, London to negate the need for these Disaster Recovery arrangements) in control of the network, until BBC Television Centre (prior to 2013)/new Broadcasting House, London (since 2013) can regain control. Both TCG and this image were transmitted from Birmingham to prove the switching facility worked. This test card was then seen again on 17 April 2007 between 4am and 5am during the BBC Learning Zone. Both transmissions were accompanied by a 4-tone test tone, ranging from extremely low frequency to a very high shrill. It is unknown if this Test Card has a name,[2] though this test card has also been known to be used on point-to-point satellite links originating from the Fucino Space Centre[17] and other places in Italy (Telefisco,[17] Lapet,[17] etc), and by Marconi Portugal.[17] Another version, modified for NTSC, was used by Televisión Nacional de Chile (TVN)[18] in the 1990s.
Untransmitted test cards
There have been a number of untransmitted test cards. They would most likely be for internal use inside the BBC. Most of them are adapted from Test Card F.[2]
Comic Relief test card
A Comic Relief test card was broadcast on BBC1 on 18 March 1993 as part of Comic Relief.[2] This test card featured ten-year-old competition winner Hannah Marriott, wearing a red nose.
^"Question: this is a layout of a SMPTE-like test pattern used by Chilean channel TVN (which uses NTSC) that I don't remember having seen anywere else. Could have been a custom design for the channel?". reddit. Retrieved 13 January 2023.
External links
The Test Card Circle Details of the UK's Trade Test Transmissions including the history of the BBC and ITA Test Cards, a look at the music used and full details about the Trade Test Colour Films shown from the late fifties to 1973.
BBC Test Card Video
BBC Test Cards from meldrum.co.uk
A Very Concise History of Test Cards by Frank Mitchell
July 25, 2023
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The following is a list of test cards used by the BBC at various points in broadcasting Contents 1 Tuning Signals 2 Test Card A 3 Test Card B 4 Test Card C 5 Test Card D 6 Test Card E later Test Card C 7 Test Card F 8 Test Card G 9 Test Card H 10 Test Card J 11 Test Card W 12 Test Card X 13 Unidentified test card 14 Untransmitted test cards 15 Comic Relief test card 16 See also 17 References 18 External linksTuning Signals Edit First tuning signal The first Tuning Signals test card was broadcast by the BBC in 1934 It was a simple line and circle broadcast using Baird s 30 line system and was used to synchronise the mechanical scanning system 1 Test Card A EditTest Card A made its debut in 1937 However it and Test Card B were soon replaced by the more useful Test Card C 2 Test Card B Edit Test Card B This section s factual accuracy is disputed Relevant discussion may be found on Talk List of BBC test cards Please help to ensure that disputed statements are reliably sourced November 2017 Learn how and when to remove this template message Test Card B was an early BBC television test card It was very similar to Test Card A but was never broadcast possibly used by BBC engineers for internal use The original card has since gone missing The only difference was it had an extra greyscale stripe below the circle The letter box in Test Card A was moved to the top of the card 2 Test Card C Edit Test Card C Test Card C 3 was a BBC television test card first broadcast in 1948 It was the first test card to resemble the famous Test Card F 2 It was also available as individual rolls of test film in the UK and many Commonwealth countries up until the end of the black and white television era 4 5 Test Card D EditTest Card D was a BBC television test card first broadcast in 1964 This was the first test card to be based on a specification 6 Later a Reduced Power Test Card D was introduced 2 7 Test Card E later Test Card C Edit Modified Test Card C Test Card E was a television test card designed in 1964 and made to accommodate the 625 line system on BBC2 as opposed to the 405 line system of Test Card D However depending on the source Test Card E was either reported to have lasted for only one day or for up to a month before being withdrawn Test Card E was thereafter replaced by a modified version of Test Card C which lasted on BBC2 until 1967 when the colour Test Card F was introduced 2 The modified Test Card C also aired on BBC1 with the BBC1 logo replacing the BBC2 625 LINES caption until it was similarly replaced by Test Card F around 1969 1972 Test Card E did however see later usage by RTE in Ireland and RTP in Portugal alongside Test Card D Test Card F EditMain article Test Card F Test Card F was the BBC s longest running and most famous test card featuring Carole Hersee and Bubbles the Clown There have been many different Test Card F variations 2 It was first broadcast on 2 July 1967 the day after the first colour pictures appeared to the public on television on BBC2 Test Card G EditTest Card G was a television test card broadcast occasionally by the BBC It was the first electronically generated test card to be broadcast and was a variant of the Philips PM5544 test card 2 This test card was generally used by local transmitters for opt outs or during times when a particular region was not showing a programme broadcast from London It was also used in place of Test Card F nationally from time to time when the projector showing the latter test card s photographic slide was not available or undergoing maintenance until Test Card F was converted to electronic form in 1984 8 Test Card G was also occasionally used by ITV alongside Test Card F before completely switching over to the ETP 1 test card in 1979 Pye Test Card G as seen on a monoscope Another Test Card G unrelated was developed by Pye as a monochrome variant on Test Card C It was used in other countries that use 625 line PAL such as Bulgaria 9 Denmark 10 Luxembourg 11 Thailand Barbados and Malaysia 12 but not in Britain 2 A slightly modified version of the Pye Test Card G was used by YLE in Finland until it switched to the colour Telefunken FuBK test card in the 1970s as well as in Norway where NRK used it in conjunction with the EIA 1956 resolution chart until it switched to the Philips PM5544 Test Card F and the Telefunken FuBK test cards in the 1970s 13 Test Card H Edit Test Card H Test Card H was designed as a line up chart for cameras in studio possibly to test chroma specifications as well as resolution and 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 14 Test Card J EditMain article Test Card J Test Card J is an enhanced revision of Test Card F first broadcast in November 1999 2 Test Card W EditMain article Test Card W Test Card W is a widescreen update of Test Card F A predecessor to Test Card W without an identifying letter first appeared in March 1998 as part of digital tests on the Astra 1D satellite and was notably broadcast to the public on 6 November 1998 as part of a joke on Have I Got News For You to censor then host Angus Deayton about discussing Peter Mandelson s life Test Card W is an updated 16 9 1 78 1 widescreen version of Test Card F It first appeared in November 1999 alongside Test Card J with which it bears some similarities Both aforementioned test cards were designed for the 16 9 widescreen ratio 2 15 Test Card X EditMain article Test Card X The high definition version of Test Card W is visually similar but officially lacks a designation letter This version is often referred to as Test Card X but this is not a designation which the BBC recognises 16 It is designed for use on high definition TV services amp had been included a part of BBC HD s preview loop since November 2008 though it had been in use internally at the BBC for several years prior until the channel s closure in March 2013 Unidentified test card Edit Recreation of the BBC unnamed electronic test card An electronically generated image was first broadcast on 21 June 1997 on BBC2 between 3 am and 4 am It was also broadcast in October 1997 from 3 29 am until 3 44 am when at the same time BBC1 showed Test Card G Both channels reverted over to these at the same time and reverted to TCF at the same time as part of a switching test with BBC Birmingham whereby in the event of a need to evacuate BBC TV to Pebble Mill Studios in Birmingham such as a power failure as happened in June 2000 a switch would be thrown putting Birmingham nowadays Red Bee Media run by two Network Directors simultaneously at MediaCityUK Salford Quays Manchester and White City Place London to negate the need for these Disaster Recovery arrangements in control of the network until BBC Television Centre prior to 2013 new Broadcasting House London since 2013 can regain control Both TCG and this image were transmitted from Birmingham to prove the switching facility worked This test card was then seen again on 17 April 2007 between 4 am and 5 am during the BBC Learning Zone Both transmissions were accompanied by a 4 tone test tone ranging from extremely low frequency to a very high shrill It is unknown if this Test Card has a name 2 though this test card has also been known to be used on point to point satellite links originating from the Fucino Space Centre 17 and other places in Italy Telefisco 17 Lapet 17 etc and by Marconi Portugal 17 Another version modified for NTSC was used by Television Nacional de Chile TVN 18 in the 1990s Untransmitted test cards EditThere have been a number of untransmitted test cards They would most likely be for internal use inside the BBC Most of them are adapted from Test Card F 2 Comic Relief test card EditA Comic Relief test card was broadcast on BBC1 on 18 March 1993 as part of Comic Relief 2 This test card featured ten year old competition winner Hannah Marriott wearing a red nose See also EditTrade test colour films PM5544 ETP 1 Video signal generatorReferences Edit BBC Tuning Signals Meldrum 29 March 2000 Archived from the original on 23 February 2009 Retrieved 14 August 2009 a b c d e f g h i j k l m BBC Test Cards Meldrum 29 March 2000 Retrieved 14 August 2009 Test Card C BBC 16 July 2015 via Flickr BBC Testcard C Telecine Lineup 16mm Film Loop YouTube Telecine a brief guide YouTube Test Card D BBC 30 July 2015 via Flickr Test Card D ITA Reduced Power 30 July 2015 via Flickr Test Card Memory Lane Archived from the original on 14 March 2016 Non UK Television Test Cards Tuning Signals Clocks and Idents Bulgaria 7 June 2019 Archived from the original on 7 June 2019 Retrieved 13 January 2023 Non UK Television Test Cards Tuning Signals Clocks and Idents Denmark 7 June 2019 Archived from the original on 7 June 2019 Retrieved 13 January 2023 Kemp AUTHOR D How to receive Continental television Transdiffusion Retrieved 13 January 2023 Mann Anthony 21 March 2005 TV Malaysia received in Perth Western Australia 1975 1987 Anthony Tony Mann s TVDX page Archived from the original on 21 March 2005 Retrieved 13 January 2023 Vintage Electronics Blog amp Forum Radios Television Hi Fi 15 February 2020 Test Card J Barney wol net 29 March 2000 Archived from the original on 1 July 2007 Retrieved 14 August 2009 YouTube www youtube com Quested Andy 17 December 2008 A Christmas Present from the HD Channel BBC Retrieved 14 August 2009 a b c d Testcards feeds ing sat what hu Question this is a layout of a SMPTE like test pattern used by Chilean channel TVN which uses NTSC that I don t remember having seen anywere else Could have been a custom design for the channel reddit Retrieved 13 January 2023 External links EditThe Test Card Circle Details of the UK s Trade Test Transmissions including the history of the BBC and ITA Test Cards a look at the music used and full details about the Trade Test Colour Films shown from the late fifties to 1973 BBC Test Card Video BBC The Television Test Card BBC Test Cards from meldrum co uk A Very Concise History of Test Cards by Frank Mitchell Retrieved from https en wikipedia org w index php title List of BBC test cards amp oldid 1163015673, wikipedia, wiki, book, books, library,
