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The Consumer Electronics Association (CEA) announced that its R5 Antenna Systems Committee has adopted a new edition of the CEA-774 standard for television antennas. Titled CEA-774A - TV Receiving Antenna Performance Presentation and Measurement, the updated standard provides manufacturers of television antennas with the test and measurement procedures necessary to make their products compliant with the antenna categories defined at www.antennaweb.org. The web site is used by consumers and professional installers to determine which types of television antennas are most appropriate for specific street addresses.
This enhanced standard will allow manufacturers to design and build high-quality antennas to help ensure that viewers can receive over-the-air digital television signals. The most significant improvement in the new version of the standard is the addition of a method for measuring antenna performance in a Gigahertz Transverse Electromagnetic Mode (GTEM) cell. GTEM cells are relatively small, specially designed compartments.
The methods allow testing of antennas to be conducted indoors in appropriately equipped laboratories with no impact from the laboratory environment. The standard previously required that tests be conducted outdoors on an open field test range.
"CEA-774A not only embraces and refines the time tested antenna range test methods," said Ray Connover, chair of the Antenna Systems committee that developed the standard and consultant to CONUS Communications and Hubbard Broadcasting, "it also adds new alternate test methodologies such as the addition of a GTEM cell. Use of these new test methods allow antennas to be tested quickly without any environment effects. Antennas for digital television service are especially well suited to the new test methods defined in CEA-774A."
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