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Tektronix DTG5000 Series manual

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Table of contents for the manual

  • Page 1

    Introduction The High Definition Multimedia Interface (HDMI) is an emerging consumer electronics standar d that is fast gaining acceptance by manufacturers of digital enter tainment pr oducts. HDMI offers an ef ficient one-cable inter face for High Definition (HD) video and audio content between receiver/playback devices and display devices. T ypic[...]

  • Page 2

    H DMI Compliance & Sink Characterization Using DTG5000 Series Data T iming Generator Application Note 2 www .tektronix.com/signal_sources 2 HDMI supports standard, enhanced, or HD video as well as standard or multi-channel surr ound audio. The interface offers uncompressed digital video and a bandwidth of up to 5 gigabytes per second thr ough o[...]

  • Page 3

    H DMI Compliance & Sink Characterization Using DTG5000 Series Data T iming Generator Application Note 3 www .tektronix.com/signal_sources The basic TMDS transmission line is made up of three data channels and a clock channel. Data consists of 8-bit pixels (256 discrete levels) in each of thr ee channels (R/G/B). These are encoded into ten-bits [...]

  • Page 4

    H DMI Compliance & Sink Characterization Using DTG5000 Series Data T iming Generator Application Note 4 www .tektronix.com/signal_sources 4 Most HDMI product developers want to perform pre-compliance testing; they have a clear incentive to ensure inter operability and compatibility . While it is r ecommended to per for m as many tests as possib[...]

  • Page 5

    H DMI Compliance & Sink Characterization Using DTG5000 Series Data T iming Generator Application Note 5 www .tektronix.com/signal_sources The jitter tolerance testing is perfor med in the follow- ing broad steps: 1. Determining W orst-case Clock-Data ske w: The skew in data is varied until the worst point is determined. This test is per formed [...]

  • Page 6

    H DMI Compliance & Sink Characterization Using DTG5000 Series Data T iming Generator Application Note 6 www .tektronix.com/signal_sources 6 Intra-P air Ske w The Sink device also must tolerate a certain amount of intra-pair skew , that is, timing skew (misalignment) within respective dif ferential TMDS pairs. The CTS standar d defines a limit o[...]

  • Page 7

    H DMI Compliance & Sink Characterization Using DTG5000 Series Data T iming Generator Application Note 7 www .tektronix.com/signal_sources Hard ware Requirements: T est Equipment and P eripherals For Sink T ests T able 3 summarizes the measurement equipment and accessories (probes, cables, etc.) r equired for the sink tests just described. The l[...]

  • Page 8

    H DMI Compliance & Sink Characterization Using DTG5000 Series Data T iming Generator Application Note 8 www .tektronix.com/signal_sources 8 Jitter tolerance tests requir e a variable amount of jitter to be imposed on signals being sent to the device under test. The DTG5000 Series instruments are fully compatible with either of two recommended j[...]

  • Page 9

    H DMI Compliance & Sink Characterization Using DTG5000 Series Data T iming Generator Application Note 9 www .tektronix.com/signal_sources – DTGM32 and Function Generator Method: This appr oach is ideal for quick verification and cost- effective pr e-compliance testing. The method uses a DTGM32 module (Figure 6) plugged into the DTG5000 Series[...]

  • Page 10

    H DMI Compliance & Sink Characterization Using DTG5000 Series Data T iming Generator Application Note 10 www .tektronix.com/signal_sources 10 T est Adapters The approach using the DTGM32 and the AFG allows for thorough compliance and pr e compliance testing with a much simpler setup than the A WG method. This method was designed for pre/complia[...]

  • Page 11

    H DMI Compliance & Sink Characterization Using DTG5000 Series Data T iming Generator Application Note 11 www .tektronix.com/signal_sources Software T ools For Sink T ests Sink tests, like Source tests, can take a lot of time. In case of Sink tests, there is the complexity of contr olling several tools to conclude a measurement, as well as the c[...]

  • Page 12

    C ontact T ektronix: A SEAN / Australasia / Pakistan ( 65) 6356 3900 A ustria + 41 52 675 3777 B alkan, Israel, South Africa and other ISE Countries + 41 52 675 3777 B elgium 0 7 81 60166 B razil & South America 5 5 (11) 3741-8360 C anada 1 (800) 661-5625 C entral East Europe, Ukraine and Baltics + 41 52 675 3777 C entral Europe & Greece + [...]