CEA-2028-A-2008.pdf
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1、 CEA Standard Color Codes for Outdoor TV Receiving Antennas CEA-2028-A December 2008 Copyright Consumer Electronics Association Provided by IHS under license with CEA Licensee=Boeing Co/5910770001 Not for Resale, 01/31/2009 04:45:14 MSTNo reproduction or networking permitted without license from IHS
2、 -,-,- NOTICE Consumer Electronics Association (CEA) Standards, Bulletins and other technical publications are designed to serve the public interest through eliminating misunderstandings between manufacturers and purchasers, facilitating interchangeability and improvement of products, and assisting
3、the purchaser in selecting and obtaining with minimum delay the proper product for his particular need. Existence of such Standards, Bulletins and other technical publications shall not in any respect preclude any member or nonmember of CEA from manufacturing or selling products not conforming to su
4、ch Standards, Bulletins or other technical publications, nor shall the existence of such Standards, Bulletins and other technical publications preclude their voluntary use by those other than CEA members, whether the standard is to be used either domestically or internationally. Standards, Bulletins
5、 and other technical publications are adopted by CEA in accordance with the American National Standards Institute (ANSI) patent policy. By such action, CEA does not assume any liability to any patent owner, nor does it assume any obligation whatever to parties adopting the Standard, Bulletin or othe
6、r technical publication. This CEA Standard is considered to have International Standardization implication, but the International Electrotechnical Commission activity has not progressed to the point where a valid comparison between the CEA Standard and the IEC document can be made. This Standard doe
7、s not purport to address all safety problems associated with its use or all applicable regulatory requirements. It is the responsibility of the user of this Standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations before its use. (For
8、mulated under the cognizance of the CEAs R5 Antennas Committee.) Published by CONSUMER ELECTRONICS ASSOCIATION 2008 Technology Phone 800-854-7179; Fax 303-397-2740; Internet http:/; Email 2.2 Informative References The following standards contain provisions that, through reference in this text, con
9、stitute informative provisions of this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards
10、listed here. 2.2.1 Informative Reference List ATSC Recommended Practice A/74, Receiver Performance Guidelines, June 18, 2004, with Corrigendum No. 1 and Amendment No. 1. ANSI/CEA-909-A, Antenna Control Interface, December 2007 Copyright Consumer Electronics Association Provided by IHS under license
11、with CEA Licensee=Boeing Co/5910770001 Not for Resale, 01/31/2009 04:45:14 MSTNo reproduction or networking permitted without license from IHS -,-,- CEA-2028-A 2 2.2.2 Informative Reference Acquisition ATSC Standards: Advanced Television Systems Committee, 1750 K Street, NW, Suite 1200, Washington,
12、DC USA 20006; Phone 202-872-9160; Fax 202-872-9161; Internet http:/www.atsc.org CEA Standards: Global Engineering Documents, World Headquarters, 15 Inverness Way East, Englewood, CO USA 80112-5776; Phone 800-854-7179; Fax 303-397-2740; Internet http:/; Email 2.3 Definitions Antenna Directivity Patt
13、ern A plot of the horizontal radiation pattern of an antenna. Average Gain to Null Ratio The average gain to null ratio is the ratio of the average gain of all lobes within 3 dB of the maximum lobe to the minimum null CEA Test Channels The TV channels on which tests are to be conducted. These are de
14、fined in CEA-774-B, Section 5. CEA TV Antenna Selector Map Program A computer program that allows consumers to input their location and receive a listing of receivable terrestrial over- the-air TV signals along with recommendations for appropriate antennas with which to receive these signals. Consum
15、ers may access this program at www.AntennaWeb.org. Front to Back Ratio The ratio of an antennas maximum gain (front, 0) to the highest gain between 90 and 270 (back). Half Power Beam Width In a radiation pattern plot containing the direction of the maximum lobe, the angle between the two directions
16、in which the radiation pattern shows one-half the maximum value. 2.4 Symbols and Abbreviations dB Decibel dBd Decibels with respect to a dipole dBm Decibels with respect to a milliwatt UHF Ultra High Frequency VHF Very High Frequency 2.5 Compliance Notation As used in this document “shall” and “must
17、” denote mandatory provisions of the standard. “Should” denotes a provision that is recommended but not mandatory. “May” denotes a feature whose presence does not preclude compliance, and implementation of which is optional. “Optional” denotes items that may or may not be present in a compliant devi
18、ce. Copyright Consumer Electronics Association Provided by IHS under license with CEA Licensee=Boeing Co/5910770001 Not for Resale, 01/31/2009 04:45:14 MSTNo reproduction or networking permitted without license from IHS -,-,- CEA-2028-A 3 3 Color Coding of Outdoor TV Receiving Antennas Use of color
19、codes and various trademarked CEA logos associated with the www.AntennaWeb.org program require a license agreement with CEA. The license agreement regulates the way color codes and logos can be used. The color codes are: yellow, green, light green, red, blue, and violet. The color coding is nominall
20、y hierarchical in that higher gain antennas will, in general, (see Annex A for more information and application information) qualify for the color of lower gain antennas. For example a red antenna would also qualify as a light green, green, and yellow antenna. All antenna gain measurements shall be
21、without external amplification (i.e., only the antenna as defined herein is to be measured). 3.1 Multidirectional Antennas Coded Yellow, Green, Light Green 3.1.1 Yellow Requirements To be eligible for the yellow color code an antenna must have antenna gain: that exceeds an average of -25.0 dBd on CE
22、A Test Channels 2, 4 and 6, with the gain on any single channel exceeding -29.0 dBd; that exceeds an average of -15.0 dBd on CEA Test Channels 7, 9, 11 and 13, with the gain on any single channel exceeding -19.0 dBd; and that exceeds an average of -10.0 dBd on CEA Test Channels 14, 20, 26, 32, 38, 4
23、4, 50, 56, 62 and 69, with the gain on any single channel exceeding -14.0 dBd. When employing a built-in active amplifier stage yellow coded antennas must meet the intermodulation and pre-amplifier criteria described in 3.3. 3.1.2 Green Requirements To be eligible for the green color code an antenna
24、 must have antenna gain: that exceeds an average of 12.0 dBd on CEA Test Channels 2, 4 and 6, with the gain on any single channel exceeding 16.0 dBd; that exceeds an average of 9.0 dBd on CEA Test Channels 7, 9, 11 and 13, with the gain on any single channel exceeding 13.0 dBd; and that exceeds an a
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