1、 ANSI/CTA Standard Performance Specification for Public Alert Receivers ANSI/CTA-2009-B R-2016 (Formerly ANSI/CEA-2009-B) November 2010 NOTICE Consumer Technology Association (CTA) Standards, Bulletins and other technical publications are designed to serve the public interest through eliminating mis
2、understandings between manufacturers and purchasers, facilitating interchangeability and improvement of products, and assisting the purchaser in selecting and obtaining with minimum delay the proper product for his particular need. Existence of such Standards, Bulletins and other technical publicati
3、ons shall not in any respect preclude any member or nonmember of the Consumer Technology Association from manufacturing or selling products not conforming to such Standards, Bulletins or other technical publications, nor shall the existence of such Standards, Bulletins and other technical publicatio
4、ns preclude their voluntary use by those other than Consumer Technology Association members, whether the standard is to be used either domestically or internationally. Standards, Bulletins and other technical publications are adopted by the Consumer Technology Association in accordance with the Amer
5、ican National Standards Institute (ANSI) patent policy. By such action, the Consumer Technology Association does not assume any liability to any patent owner, nor does it assume any obligation whatever to parties adopting the Standard, Bulletin or other technical publication. Note: The users attenti
6、on is called to the possibility that compliance with this standard may require use of an invention covered by patent rights. By publication of this standard, no position is taken with respect to the validity of this claim or of any patent rights in connection therewith. The patent holder has, howeve
7、r, filed a statement of willingness to grant a license under these rights on reasonable and nondiscriminatory terms and conditions to applicants desiring to obtain such a license. Details may be obtained from the publisher. This document does not purport to address all safety problems associated wit
8、h its use or all applicable regulatory requirements. It is the responsibility of the user of this document to establish appropriate safety and health practices and to determine the applicability of regulatory limitations before its use. This document is copyrighted by the Consumer Technology Associa
9、tion (CTA) and may not be reproduced, in whole or part, without written permission. Federal copyright law prohibits unauthorized reproduction of this document by any means. Organizations may obtain permission to reproduce a limited number of copies by entering into a license agreement. Requests to r
10、eproduce text, data, charts, figures or other material should be made to the Consumer Technology Association (CTA). (Formulated under the cognizance of the CTA R6 Portable, Handheld and In-Vehicle Electronics Committee.) Published by CONSUMER TECHNOLOGY ASSOCIATION 2016 Technology Electromagnetic co
11、mpatibility and Radio spectrum Matters (ERM); Enhanced Radio MEssage System (ERMES); Part 5: Receiver conformance specification; European Telecommunications Standards Institute (ETSI); November 1997. FCC Bulletin OST 55, “Characteristics of Open Field Test Sites;” Federal Communications Commission F
12、ederal Information Processing Standards (FIPS) Publication 6-4 for Counties and Equivalent Entities of the United States, its Possessions, and Associated Areas National Weather Service Instruction 10-1710, NOAA Weather Radio (NWR) Dissemination, October 1, 2002. 2.1.2 Normative Reference Acquisition
13、 ANSI/EIA/CTA 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 ETSI Standards: European Telecommunications Standards Institute; 650 Route des Lucioles; Sophia Antipolis; Val
14、bonne; FRANCE; Phone +33 4 92 94 42 00; Internet http:/www.etsi.org FCC Bulletins: Federal Communications Commission, Office of Engineering and Technology, Customer Service Branch, MS 1300F2, 7435 Oakland Mills Road, Columbia, MD 21046, USA; Fax: (301) 344-2050; Email: labinfofcc.gov; Internet http:
15、/www.fcc.gov Federal Information Processing Standards: National Institute of Standards and Technology, Information Technology Laboratory, 100 Bureau Drive, Gaithersburg, MD 20899-3460; Internet http:/www.itl.nist.gov/ 1 CTA-2009-B NOAA Standards: U.S. Department of Commerce, National Oceanic and Atm
16、ospheric Administration, National Weather Service, Office of Operational Systems, 1325 East West Highway, Silver Spring, MD 20910; Internet http:/www.nws.noaa.gov 2.2 Informative References and Acquisition NOAA Marine Zone Number Data Files at: http:/www.nws.noaa.gov/geodata/ (follow the link under
17、“Code Listings for Special Applications: EAS and NWR“ to data files); NOAA Marine Zone Numbers: U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Weather Service, Office of Climate, Water and Weather Services, 1325 East-West Highway, Silver Spring, MD 20910-3283
18、2.3 Definitions Event Code The event code indicates the nature of the Public Alert activation. FIPS Codes A standardized set of numeric or alphabetic codes issued by the National Institute of Standards and Technology (NIST) to ensure uniform identification of geographic entities through all U.S. fed
19、eral government agencies. The entities covered include: states and statistically equivalent entities, counties and statistically equivalent entities, named populated and related location entities (such as, places and county subdivisions), and American Indian and Alaska Native areas. Fixed Character
20、Display A display device that has a limited number of character sets (e.g., a multi-segment display). Institutional Device A device that meets more stringent performance requirements as defined in this standard. Location Codes PSSCCC is the location code and indicates the geographic area affected by
21、 a SAME message. P defines all or a portion of a county or other SS subdivision. SS is the state or marine area or other equivalent identified by the U.S. National Weather Service (NWS) or the Meteorological Service of Canada (MSC). CCC is the SS subdivision as defined by the NWS or MSC. CCC may be
22、defined as follows: FIPS numbers as described by the NIST publication ANSI INICTS 31200x Numbers for region, county, parish, district or cities as assigned Marine zone numbers as assigned by the NWS or the MSC. Rated Load Impedance The load impedance intended for connection to the output terminals o
23、f the receiver under test. Rated Output Level The standard output level applied to the Rated Load Impedance. Root Mean Square The square root of the mean of the squares of a series of instantaneous values of a varying waveform, commonly abbreviated as “RMS.” 2 CTA-2009-B Specific Area Message Encodi
24、ng A method of identifying a specific area for an alert by generating a digital data stream containing an alert message that has information about the type of alert, the time and duration of the alert, and the location of the alert based on the county or portion of the county (counties may be divide
25、d in up to 9 subsections). Total Harmonic Distortion A measurement of all of the energy within a specified bandwidth at plus Noise the output of an amplifier when a single specific frequency is being fed into the input of the amplifier, minus the energy at that specific frequency at the output of th
26、e amplifier. 2.4 Symbols and Abbreviations AC Alternating Current AFSK Audio Frequency Shift Keying CTA Consumer Technology Association CLC Canadian Location Code FIPS Federal Information Processing Standards (U.S.) ms Milliseconds MSC Meteorological Service of Canada NIST National Institute of Stan
27、dards and Technology (U.S.) NOAA National Oceanic and Atmospheric Administration (U.S.) NWR NOAA Weather Radio (U.S.) NWS National Weather Service (U.S.) SAME Specific Area Message Encoding THD+N Total Harmonic Distortion plus Noise 2.5 Compliance Notation As used in this document, “shall” and “must
28、” 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
29、ce. 3 Standard Test Conditions When reporting the results of tests conducted in accordance with this standard the user shall note that the measurements were made in accordance with CTA-2009. If the user makes additional measurements that are not specified in this standard, then this shall be noted i
30、n the report. 3.1 Power Supply Requirements Normal AC Supply Voltage: The supply voltage shall be within 1% of 120 V AC. Low (Brownout) Supply Voltage: The supply voltage shall be within 1% of 110 V AC. High (Over Voltage) Supply Voltage: The supply voltage shall be within 1% of 135 V AC. No (Blacko
31、ut) Supply Voltage: The supply voltage shall be within 1% of 105 V AC. Direct Current: Direct-current powered receivers shall be tested at the recommended supply voltage 1%, and this voltage shall be stated. The supply voltage frequency in the case of AC operated receivers shall be 60 Hz 2%. The sup
32、ply voltage waveform shall be a sine wave with harmonic distortion no greater than 2.0%. For DC operated receivers, the DC supply voltage waveform shall have a ripple content no greater than 0.1%. 3 CTA-2009-B 3.2 Environmental Conditions Unless otherwise stated by the manufacturer or the laboratory
33、 conducting the test measurements, all measurements shall be made at an ambient temperature of 23 degrees Celsius with relative humidity of 50%, 5%. Measurements may be made at any ambient temperature between 15 and 35 degrees Celsius, and a relative humidity between 45% and 75%, provided that no si
34、gnificant measurement error (i.e. no significant difference from the measurements at 23 degrees Celsius and 50% 5% relative humidity) results. 3.3 Equipment Preconditioning The unit to be tested shall be switched on under primary power for a period of 30 minutes prior to measurement, unless the omis
35、sion of the stabilization time does not result in any errors. 3.4 Audio Signal Levels If the receiver under test has a volume control, tests shall be conducted with the volume control adjusted for the maximum audio output level for which the THD+N does not exceed 10% within the frequency range 300-3
36、,000 Hz. If THD+N never exceeds 10% then it shall be tested at the maximum audio output. If the receiver under test has other audio controls, such as loudness or automatic level controls, then the position of these controls must be indicated when data is reported. If no such indication is made in th
37、e report, it is assumed that any such features were turned off during testing. 3.5 Standard Load Impedance For audio measurements, a load consisting of a 10,000 ohm 1% resistor in parallel with a 200 pF 5% capacitor shall be connected to each line output terminal. The measuring device shall be conne
38、cted as specified by the vendor. 4 REQUIREMENTS TUNER SECTION Unless otherwise specified, all measurements shall be made under the standard test conditions described in Section 3, with output terminations in place. 4.1 Channel Availability The device shall be capable of receiving and successfully de
39、coding signals on the following VHF FM frequencies: Channel Frequency 1 162.400 MHz 2 162.425 MHz 3 162.450 MHz 4 162.475 MHz 5 162.500 MHz 6 162.525 MHz 7 162.550 MHz 4.2 Channel Selection Methods The user shall be able to manually select the channel (this shall be the default channel selection mod
40、e). When a channel is selected the unit will automatically return to that channel on the next power up. If an automatic channel selection method is included may cause the unit to tune to the strongest RF signal available. If no single channel provides the strongest RF signal the unit shall select a
41、single channel from among those multiple channels that provide the strongest signal level and use that channel 4 CTA-2009-B as the default channel. If the unit is intended for mobile or portable use, the automatic channel selection method may be initiated at regular intervals, or at power up, to con
42、tinually update the strongest signal. 4.3 Selectivity The adjacent channel selectivity is a measure of the capability of the receiver to receive a wanted modulated signal without exceeding a given degradation due to the presence of an unwanted signal which differs in frequency from the wanted signal
43、 by an amount equal to the adjacent channel separation for which the equipment is intended. This specification shall not apply to receivers incorporating AFC (automatic frequency control). 4.3.1 Measuring system block diagram See Figure 1. Figure 1: Measuring System Block Diagram 4.3.2 Measurement m
44、ethod a) Two signal generators A and B shall be connected to the receiver under test via a combiner. b) The wanted signal, provided by signal generator A, shall be at the nominal frequency of the receiver and be modulated with a 1 kHz tone at +/-3 kHz deviation. c) The unwanted signal, provided by s
45、ignal generator B, shall be modulated with 400 Hz tone at +/-3 kHz deviation and shall be at the frequency of the channel immediately above that of the wanted signal. d) Initially, the unwanted signal shall be switched off. e) The level of the wanted signal from generator A shall be adjusted to a le
46、vel which the SINAD meter reading is 12 dB SINAD. f) Record the level of signal generator A as P1. g) Increase the signal generator A level by 3 dB h) The unwanted signal from signal generator B shall then be switched on. i) Adjust the output level of signal generator B until the SINAD meter reading
47、 returns to 12 dB SINAD. j) Record the level of signal generator B as P2. k) Calculate selectivity by subtracting P1 from P2. l) The measurement shall be repeated with the unwanted signal at the frequency of the channel Signal Generator A Signal Generator B Combiner Receiver Under Test Audio Frequen
48、cy Load/Acoustic Coupler SINAD Meter 5 CTA-2009-B below that of the wanted signal. m) The adjacent channel selectivity of the equipment under test shall be expressed as the lower of the two values calculated in step l) for the upper and lower channels nearest to the receiving channel. n) Selectivity
49、 shall be at least 50 dB. 4.4 Signal-to-Noise Ratio The S/N is measured under the following conditions: RF modulation: 1 kHz tone at +/- 3 kHz. RF level: 1 mV, for channels 1-7 A weighted or CCIT weighted RMS detection with line trap (15.734 kHz null filter is optional) De-emphasis. Measurement location: Line output (or speaker terminals) With standard test signal level applied, the ratio of rated audio power with standard test modulation to residual audio power with no modulation at the same volume setting shall be 37
