CEA-2028-2005.pdf
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1、 ANSI/CEA Standard Color Codes for Outdoor TV Receiving Antennas ANSI/CEA-2028 September 2005 Copyright Consumer Electronics Association Provided by IHS under license with CEA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/30/2007 21:45:40 MDTNo reproduction or networking pe
2、rmitted without license from IHS -,-,- NOTICE 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 the
3、 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 such
4、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 an
5、d 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 other t
6、echnical 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 does n
7、ot 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. (Formul
8、ated under the cognizance of the CEAs R5 Antennas Committee.) Published by CONSUMER ELECTRONICS ASSOCIATION 2002 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, consti
9、tute 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 lis
10、ted here. 2.2.1 Informative Reference List ATSC Recommended Practice A/74, Receiver Performance Guidelines, June 18, 2004. CEA-909, Antenna Control Interface, June, 2002. Copyright Consumer Electronics Association Provided by IHS under license with CEA Licensee=IHS Employees/1111111001, User=Wing, B
11、ernie Not for Resale, 03/30/2007 21:45:40 MDTNo reproduction or networking permitted without license from IHS -,-,- 2 2.2.2 Informative Reference Acquisition ATSC Standards: Advanced Television Systems Committee, 1750 K Street, NW, Suite 1200, Washington, DC USA 20006; Phone 202-872-9160; Fax 202-87
12、2-9161; 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 Pattern A plot of the horizontal radiation patte
13、rn of an antenna. CEA Test Channels The TV channels on which tests are to be conducted. These are defined in CEA-774-A, 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 sig
14、nals along with recommendations for appropriate antennas with which to receive these signals. Consumers may access this program at http:/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
15、radiation pattern plot containing the direction of the maximum lobe, the angle between the two directions 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
16、 High Frequency VHF Very High Frequency 2.5 Compliance Notation As used in this document “shall” and “must” 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 implem
17、entation of which is optional. “Optional” denotes items that may or may not be present in a compliant device. 3 Color Coding of Outdoor TV Receiving Antennas Use of color codes and various trademarked CEA logos associated with the antennaweb.org program require a license agreement with CEA. The lice
18、nse agreement regulates the way color codes and logos can be used. Copyright Consumer Electronics Association Provided by IHS under license with CEA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/30/2007 21:45:40 MDTNo reproduction or networking permitted without license fro
19、m IHS -,-,- 3 The color codes are: yellow, green, light green, red, blue, and violet. The color coding is nominally 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 r
20、ed antenna would also qualify as a light green, green, and yellow antenna. All antenna gain measurements shall be 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 b
21、e eligible for the yellow color code an antenna must have antenna gain: that exceeds an average of -25.0 dBd on CEA 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 singl
22、e channel exceeding -19.0 dBd; and that exceeds an average of -10.0 dBd on CEA Test Channels 14, 20, 26, 32, 38, 44, 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 pr
23、e-amplifier criteria described in 3.3. 3.1.2 Green Requirements To be eligible for the green color code an antenna 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 o
24、n CEA Test Channels 7, 9, 11 and 13, with the gain on any single channel exceeding 13.0 dBd; and that exceeds an average of 6.0 dBd on CEA Test Channels 14, 20, 26, 32, 38, 44, 50, 56, 62 and 69, with the gain on any single channel exceeding 10.0 dBd. When employing a built-in active amplifier stage
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