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UL Receives HDMI Forum Approval to Test New Ultra High Speed HDMI® Cables

The new testing services help HDMI® Authorized Test Centers (ATCs), cable manufacturers, buyers and other customers confirm the EMI compliance of cables.

Photo of an HDMI cable

November 20, 2020

Hong Kong, November 20, 2020 – UL’s Dongguan Songshan Lake laboratory testing house now offers electromagnetic interference (EMI) compliance testing for the new Ultra High Speed (UHS) High Definition Multimedia Interface (HDMI® cables, also known as Category 3 HDMI® cables). The new testing services help HDMI® Authorized Test Centers (ATCs), cable manufacturers, buyers and other customers confirm the EMI compliance of cables in accordance with the requirements outlined in the Ultra High Speed HDMI® Cable Certification Program.

All UHS HDMI® cables must pass certification testing before being placed on the market. Radiation emitted by the UHS HDMI® cable should be exceptionally low as low radiation minimizes interruption to the operation of peripheral wireless devices due to the EMI of the cable. 

Following testing, manufacturers need to affix an Ultra High Speed HDMI® Certification Label, allowing consumers and end users to easily verify the certification status of the cable. The HDMI Forum announced recently certification labels for the UHS HDMI® cable are available to order and industry stakeholders anticipate UHS HDMI® cables will soon appear in the market for consumers to purchase and use. 

Fred Shek, senior director of UL’s Wire and Cable division, said, “EMI compliance is an essential step for manufacturers who want to place UHS HDMI® cables on the market. We are excited to be approved by the HDMI Forum as an EMI test house and look forward to helping businesses solve critical safety and performance challenges, confirm compliance and gain market access.”

If you are interested in learning more about the EMI testing services, please visit

About UL

UL helps create a better world by applying science to solve safety, security and sustainability challenges. We empower trust by enabling the safe adoption of innovative new products and technologies. Everyone at UL shares a passion to make the world a safer place. All of our work, from independent research and standards development, to testing and certification, to providing analytical and digital solutions, helps improve global well-being. Businesses, industries, governments, regulatory authorities and the public put their trust in us so they can make smarter decisions. To learn more, visit To learn more about our nonprofit activities, visit

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