List of BBC test cards: Wikis

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From Wikipedia, the free encyclopedia

The following is a list of test cards used by the BBC at various points in broadcasting.

Contents

Tuning Signals

The first test card "Tuning Signals" 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]

First TV TestCard.svg

Test Card A

Test Card A made its debut in the late 1940s. However, it and Test Card B were soon replaced by the more useful Test Card C.[2]

Testcard A.jpg

Test Card B

Test Card B was an early BBC television test card. It was very similar to Test Card A but was never broadcast. The original card has since gone missing. Test Card B was very similar to Test Card A. 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. This card was never broadcast, possibly used for by BBC engineers for internal use. Below is a reconstruction of Test Card B using a studio picture of a partial Test Card B.[2]
Test B.jpg

Test Card C

Test Card C is a BBC television test card first broadcast in 1948. It was the first test card to resemble the famous Test Card F.[2]

Testcard c.jpg

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. Later, a "Reduced Power" Test Card D was introduced.[2]

Testcard D.jpg Testcard D2.jpg

Test Card E

Test Card E (shown on left) 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, it only lasted one day on television, and was soon replaced by a modified version of Test Card C (shown on right). This lasted until 1967 when the colour Test Card F was introduced.[2]

Testcard E.jpg Testcard E2.jpg

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]
Testcard F.jpg

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 pattern.[2]


Another Test Card G, unrelated, was developed by Pye as a variant on Test Card C. It was used in other countries that use 625-line PAL, but probably not in Britain.[2]

MonoscopeCU.jpg Testcard G2.jpg

Test Card H

Test Card H abandoned in development - it was never broadcast. The "H" designation was also used for a studio line-up card, so it was not allocated to a Test Card to avoid ambiguity.[3]

Test Card J

Test Card J is an enhanced revision of Test Card F.[2]

Test Card W

Test Card W is a widescreen update of Test Card F. The Test Card was designed for the 16:9 (widescreen) ratio.[2]

Test Card HD

The High Definition version of Test Card W is visually similar but lacks a designation letter. This version is often referred to as Test Card X, but this is not a designation which the BBC recognises.[4] It is designed for use on High Definition TV services, and has been included a part of BBC HD's preview loop since November 2008 (though has been in use internally at the BBC since several years earlier).
Testcard hd.jpg

Sky's HD Test Card Made to look like Test Card F

This is Sky's attempt to make a Sky HD test card that looks like Test Card F Myleene Klass replaces Carole Hersee.[5]
Sky Test Card F.jpg

Unidentified Test Card

An electronically generated image was first broadcast on 21 June 1997 on BBC2 between 3am and 4am. The test card was then seen again 17 April 2007 between 4am - 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]
Bbc2 1997TestCard.jpg

Un-Transmitted Test Cards

There has been a number of Un-Transmitted 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 Testcard was broadcast BBC1 on 18 March 1993 as part of Comic Relief.[2]

References

Notes

External links


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