Telefunken FuBK

Some elements present on the FuBK test card:[4]

• Cross hatch - makes up the background of the table and allows adjustment of CRT convergence and focussing
• Circle - provide a way to correct vertical and horizontal raster scan geometrical distortions;
• Colour bars - EBU color bars at 75% luminance to adjust color saturation and purity
• Grey staircase - five bars (0%, 25%, 50%, 75%, 100%) that allow setting brightness, linearity and contrast control
• 2T convergence cross - check for signal reflections and group delay, help with geometrical image centering
• Multiburst- four grating with sine curves at 1, 2, 3 and 4.433 MHz, as a test of horizontal resolution
• Black section- check for reflections, transient response and group delay
• ±V/ +U ramp - two lines that allow checking PAL decoder linearity with UV signals
• +V/ ±U anti PAL - two achromatic fields to test the PAL decoder delay line

On PAL broadcasts, with a maximum displayable video bandwidth of around 5 MHz, individual lines should just be visible in all Multiburst gratings. On other situations, like a VHS recording with reduced bandwidth, they become more and more indistinct, merging into a grey area.

The two special achromatic fields should display as grey if PAL decoding is functioning correctly. If not, colour will be seen on these areas.[4]

This pattern was used by many broadcasters, including:

• ARD[30] and ZDF[31] (Germany, ARD also used the 16:9 variation)[3]
• Norddeutscher Rundfunk (NDR Fernsehen; Northern German Broadcasting Hamburg)[32][3]
• Westdeutscher Rundfunk (WDR Fernsehen; West German Broadcasting Cologne)[33]
• Südwestrundfunk (SWR Fernsehen; southwest Germany)[34]
• Deutsche Bundespost (Germany)[35]
• Hessischer Rundfunk (hr-fernsehen, Germany)[36]
• Hrvatska radiotelevizija (Croatian Radiotelevision)
• Argentina Televisora Color, Telefe (Argentina)
• Rupavahini (Sri Lanka)[13]
• RTL9 (Luxembourg)
• Rádio e Televisão de Portugal (RTP; Portuguese public broadcasting corporation)[37][38]
• Islamic Republic of Iran Broadcasting (IRIB; used a variation of the pattern)
• RTL-TVI[39] and VT4[40] (Belgium)
• Canal+ (Belgium; used a modification of the pattern with grid cross)[41]
• NRK (Norwegian Broadcasting Corporation)[3]
• YLE,[42][43] Kolmoskanava,[44] MTV3[45] and Nelonen[46] (Finland)[3]
• Yugoslav Radio Television[47][3][38]
• SRG SSR (SF,[48] TSR,[49] TSI[50]); Teleclub[51] (Switzerland)[52][3][53][54]
• Doordarshan (Indian public television broadcaster; 4:3 version without circle)[8]
• BTV6[55] and GTV9[56] in Australia
• Channel 7 (Thailand)[57]
• Magyar Televízió (Hungarian public television broadcaster; replaced Philips PM5544 from 2009)[58]
• NPO 1, NPO 2, NPO 3 (Netherlands)[59]
• Nozema and Staatsbedrijf der Posterijen, Telegrafie en Telefonie (Netherlands)
• Televiziunea Română (Romanian public television broadcaster; with[60] and without[61] circle)[62]
• Czechoslovak Television[63]
• ERTT (Tunisia)[64][65]
• M-Net[66] and e.tv[67] (South Africa)
• al-Jamahiriya TV (Libya; original and modified versions)[68][18]
• Kanal 2 (Denmark)[12]

• Philips PM5544
• ETP-1
• Test card