802BT/802R Video Test Generator User Guide 173
3. Use the I2CW command to modify the EDID structure in the connected display.
For example, to change the color characteristics of the EDID structure (a total of 10
bytes starting at byte 19), you could use the following command string:
i2cw eprom1 a0 25 A E88A82A0564796240F48
4. To program multiple segments or a complete EDID structure, use a text editor to enter
the commands in a text file, and then download the file to the generator from a terminal
emulator program such as HyperTerminal.
Testing EDID in HDMI sink device for HDMI compliance
The analyzer supports the following EDID and video HDMI compliance tests in
accordance with the HDMI Compliance Test Specification 1.0 (CTS):
• Test ID 8-1: EDID Readable
• Test ID 8-2: EDID VESA Structure
• Test ID 8-3: CEA Timing Extension Structure
• Test ID 8-17: 861B Format Support Requirements
• Test ID 8-18: HDMI Format Support Requirements
• Test ID 8-19: Pixel Encoding Requirements
• Test ID 8-20: Video Format Timing
These tests are intended for in-house testing of products before submission to an HDMI
ATC for full certification testing.

Overview of HDMI compliance testing

HDMI compliance testing is conducted through the generator’s transmit HDMI connector.
A standard HDMI-to-HDMI cable is used between the device under test and the generator.
The generator must be placed in the digital friendly mode and set to output HDMI signals,
which is the default configuration for HDMI equipped generators.
After making the physical connections you need to specify the capabilities of the sink
display under test. This enables the generator to compare the expected results with the
actual results measured from the display. Use the CDF_Sink image, which is based on the
Capabilities Declaration Form (Appendix 3) of the Compliance Test Specification, to
specify the display capabilities.
To test the sink device, load the EdidHDMI image, and turn the image knob to advance
through each test listed above in sequence.