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HDMI Compliance and Sink Characterization Using the
DTG5000 Series Data Timing Generator
Introduction
The High Definition Multimedia Interface (HDMI) is
an emerging consumer electronics standard that is
fast gaining acceptance by manufacturers of digital
entertainment products. HDMI offers an efficient
one-cable interface for High Definition (HD) video
and audio content between receiver/playback
devices and display devices.
Typical receiver/playback devices include cable
boxes, DVD players, satellite receivers, and High
Definition tuners as well as personal computers.
Display devices connected via HDMI include LCD
displays, plasma displays, and projection units.
Thanks to the simplicity of setup and the resulting
quality of the presentation, consumers are accepting
HDMI as a "must-have" item for the full HD experience.
HDMI uses the existing Digital Video Interface (DVI)
architecture and adds capability for High Definition
Audio and High-Bandwidth Digital Content Protection
(HDCP). The latter technology enables true copy
protection of high-quality digital movie content.
HDCP is receiving an enthusiastic response from the
entertainment industry, which is advocating its use in
all HD consumer products.
Application Note
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Summary of Contents for Tektronix DTG5000 Series
- Page 1 HDMI Compliance and Sink Characterization Using the DTG5000 Series Data Timing Generator Introduction The High Definition Multimedia Interface (HDMI) is an emerging consumer electronics standard that is fast gaining acceptance by manufacturers of digital entertainment products. HDMI offers an efficient...
- Page 2 HDMI Compliance & Sink Characterization Using DTG5000 Series Data Timing Generator Application Note Figure 1. HDMI pixel data flow and organization from Source to Sink. HDMI supports standard, enhanced, or HD video as well as standard or multi-channel surround audio. The...
- Page 3 HDMI Compliance & Sink Characterization Using DTG5000 Series Data Timing Generator Display Standard Resolution Data Rate 640 x 480 252 Mb/s SVGA 800 x 600 400 Mb/s 1024 x 768 650 Mb/s SXGA 1280 x 1024 1080 Mb/s UXGA 1600 x 1200...
- Page 4 HDMI Compliance & Sink Characterization Using DTG5000 Series Data Timing Generator Application Note Electrical Signals Source Clock and/or Data Data-Data Single-ended Sink Cable Core HDMI tests. Table 2. Most HDMI product developers want to perform pre-compliance testing; they have a clear incentive to ensure interoperability and compatibility.
- Page 5 HDMI Compliance & Sink Characterization Using DTG5000 Series Data Timing Generator The jitter tolerance testing is performed in the follow- ing broad steps: 1. Determining Worst-case Clock-Data skew: The skew in data is varied until the worst point is determined. This test is performed over several iterations as illustrated in Figure 3.
- Page 6 HDMI Compliance & Sink Characterization Using DTG5000 Series Data Timing Generator Application Note Sink Test Instrument Requirements Digital Storage Oscilloscope Differential Probes TPA-R Test Adapter Set TPA-P Test Adapter Set 12 SMA Cables JAE Cable Emulator DC Power Supply GPIB USB Controller...
- Page 7 The user operates a set of simple graphic controls to set the signal parameters and variables. Every DTG5000 Series instrument is configured from a mainframe and plug-in output modules to provide the desired number and type of signals. Channels may be single-ended or differential, depending on the test requirement.
- Page 8 HDMI Compliance & Sink Characterization Using DTG5000 Series Data Timing Generator Application Note Sink jitter tolerance test setup using an AWG as the jitter source. Figure 5. Jitter tolerance tests require a variable amount of jitter to be imposed on signals being sent to the device under test.
- Page 9 The method uses a DTGM32 module (Figure 6) plugged into the DTG5000 Series mainframe, in conjunction with a 2 channel function generator to add the required jitter content. Figure 7 depicts this scheme. The DTGM32 module allows jitter components to be added to its output.
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Page 10: Test Adapters
HDMI Compliance & Sink Characterization Using DTG5000 Series Data Timing Generator Application Note Test Adapters The approach using the DTGM32 and the AFG allows for thorough compliance and pre compliance testing with a much simpler setup than the AWG method. - Page 11 TDSHT3 makes uses the GPIB interface to remotely control various parameters. The oscilloscope connects to the DTG5000 Series using a GPIB cable and to the AWG or arbitrary function generator using a GPIB-USB-B cable or E-Net to GPIB converter (available from National Instruments).
- Page 12 Please visit www.tektronix.com Copyright © 2005, Tektronix. All rights reserved. Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supersedes that in all previously published material.
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