1、- ._ EIA TIA-382-A 90 m 3234b00 0009059 I m - -L km ANSU EW TIA-382-A498 9 APPROVED: October 31,1989 EIA/TIA STANDARD Minimum Standards - Citizens Band Radio Service Amplitude Modulated (AM) Transceivers Operating in the 27 MHz Band EIAJTIA-382-A (ROvl8l of EIA-382) MARCH 1990 ELECTRONIC INDUSTRIES
2、ASSOCIATION ENGINEERING DEPARTMENT INOUSTRY ASSOCIATION EIA TIA-382-A 90 W 3234b00 00090b0 8 W NOTICE EIA/TIA Engineering Standards and Publications are designed to serve the public interest through eliminating misunderstandings between manufacturers and purchasers, facilitating interchangeability a
3、nd 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 and Publications shall not in any respect preclude any member or nonmember of EIA/TIA from manufacturing or selling products n
4、ot conforming to such Standards and Publications, nor shall the existence of such Standards and Publications preclude their voluntary use by those other than EIA/TIA menbers, whether the standard is to be used either domestically or internationally. Recommended Standards and Publications are adopted
5、 by EIA/TIA without regard to whether or not their adoption may involve patents on articles, materials, or processes. By such action, EIA/TIA does not assume any liability to any patent owner, nor does it assume any obligation whatever to parties adopting the Recommended Standard or Publication. Thi
6、s EIA/TIA 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 EIA/TIA Standard and the IEC document can be made. This Standard does not purport to add
7、ress 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. COPYRIGHT 1990 Published
8、 by ELECTRON IC IN DUSTRI ES ASSOCIATION Engineering Department 2001 Pennsylvania Ave, N.W. Washington, D.C. 20006 (Temporary Headquarters 1722 Eye St., N.W. Washington, D.C. 20006) PRICE: $16.00 All rights reserved Printed in U.S.A. EIA TIA-382-A 90 i 323qbOO OOOObL T EIA/TIA-382-A MINIMUM STANDARD
9、S - CITIZENS BAND RADIO SERVICE AMPLITUDE MODULATED (AM) TRANSCENERS OPERATING IN THE 27 MHz BAND Section CONTENTS Page 1 SCOPE 1 2 STANDARD TEST CONDITIONS. 1 3 RECEIVER SENSITIVITY 4 RECEIVER AUTOMATIC GAIN CONTROL 4 4 5 RECEIVER AUDIO SQUELCH SENSITIVITY 5 6 I 8 O 9 10 11 12 13 RECEIVER SELECTIVI
10、TY RECEIVER DESENSITIZATION IMMUNITY RECEIVER ADJACENT CHANNEL REJECTION RECEIVER SPURIOUS RESPONSE ATIENUATION RECEIVER CROSS MODULATION REJECTION RECEIVER RADIO FREQUENCY INTERMODULATION REJECTION RECEIVER AUDIO OUTPUT POWER RECEIVER AUDIO FREQUENCY RESPONSE 9 10 10 14 RECEIVER HUM AND NOISE SUPPR
11、ESSION 11 15 RECEIVER IMPULSE NOISE LIMITER/BLANKER FIGURE OF MERIT 12 16 RECEIVER ANTENNA CONDUCTED EMISSIONS 13 17 RECEIVER POWER LINE CONDUCTED EMISSIONS 14 EIA TIA-382-A 90 m 3234b00 0009Ob2 II m COaNTS (continued) Page Section 18 RECEIVER RADIATED SPURIOUS EMISSIONS (CABINET RADIATION) 15 18 19
12、 TRANSMITIER CARRIER POWER OUTPU“ 20 TRANSMITTER POWER LINE CONDUCTED EMISSIONS 18 21 TRANSMITTER CONDUCTED SPURIOUS AND 19 HARMONIC EMISSIONS 22 TRANSMITTER RADIATED SPURIOUS AND HARMONIC EMISSIONS 20. 23 23 TRANSMITTER MODULATION OCCUPIED BANDWIDTH 23 24 TRANSMITTER MODULATION LIMITING TRANSMITTER
13、 AUDIO FREQUENCY RESPONSE 26 27 27 25 TRANSMITTER AUDIO HARMONIC DISTORTION 26 TRANSMITTER HUM AND NOISE SUPPRESSION 27 TRANSMITTER CARRIER FREQUENCY TOLERANCE 28 28 29 31 31 32 28 TEMPERATURE PERFORMANCE 29 30 31 32 HIGH HUMIDITY PERFORMANCE VIBRATION STABILITY SHOCK STABILITY POWER SUPPLY VOLTAGE
14、RANGE 33 34 SUGGESTED TEST EQUIPMENT LIST 35 APPENDIXA 34 35 ii ./=- h EIA TIA-32-A 90 = 323Ll600 0009063 3 EIA/TIA-382-A Page 1 (From Standards Proposal No. 1986 formulated under the cognizance of the TR-32 Committee on Personal Radio Equipment.) 1. SCOPE This Standard details definitions, methods
15、of measurement, and minimum standards for characteristics of mobile and base AM transceivers, transmitters, and receivers, utilizing 6KOOA3E type emissions. These devices are intended for operation in the Citizens Band (CB) Radio Service as defined in Part 95 and Part 15 of Code of Federal Regulatio
16、ns, Title 47 (CFR 47) which are known as the Rules and Communications Commission. Regulations of the Federal The minimum standards herein apply to all channel settings included in the equipment and over the range of carrier frequencies specified in Section 95.625 of CFR 47. This standard is intended
17、 to promote the capability of these transmitters and receivers with the communications systems in which they will operate; however, they should not be construed as a guideline for definition of a high performance product. Rather, the individual minimum standards define a level of performance below w
18、hich consistently satisfactory operation within the intended service could not be achieved. Although some of the standards herein are prepared as a guide for compliance measurements, familiarization with appropriate sections of Parts 2, 15, and 95; in CFR 47, as well as appropriate Measurement Proce
19、dures (MP Series) issued by the Commission is essential to assure absolute understanding of the particular limits that have been established by the Federal Communications Commission. a 2. STANDARD TEST CONDITIONS 2.1 Definition Standard Test Conditions are those conditions that shall apply to a tran
20、sceiver while it is being tested for minimum requirements. these conditions shall apply unless otherwise specified. EIA TIA-32-A 90 3234600 00090b4 5 EIA/TIA-3 82-A Page 2 2.2 Specific Standard Test Conditions 2.2.1 Power Supply Test Voltage is the primary voltage applied to the input of the power c
21、able normally supplied with the equipment during all tests unless otherwise specified. Standard Test Voltage shall be as follows: Test Voltage 6.6 volts 13.8 volts 26.4 volts 36 volts 72 volts 110 volts 120 volts rms 208 volts rms 240 volts rms 220 volts rms b 2.2.2 Standard Temperatures and Humidit
22、y shall be as follows: 25 (+ /- 5) Degrees (Celsius) and less than 90% relative humidity. 2.2.3 Standard Transmitter Output Load shall consist of a nonreactive 50 ohm resistive termination. 2.2.4 Standard RF Input Signal Source shall consist of a calibrated signal generator whose internal plus exter
23、nal resistance is 50 ohms, the voltage to be measured across terminals A and B, when A and B are terminated in a 50 ohm resistive load (see Figure 2-1). 2.2.5 Standard Audio Output Load for receiver tests shall consist of a nonreactive resistive load equal to the nominal output load specified by the
24、 manufacturer. EIA TIA-382-A 90 I 3234b00 00090b5 7 I EIA/TIA-382-A Page 3 Generator Receiver Rg + Rext = 50 ohms RECEIVER TEST CONFIGURATION FIGURE 2-1 2.2.6 Standard Receiver Conditions The receiver squelch control shall be unsquelched to its maximum extent unless otherwise specified, the noise bl
25、anker disabled, the RF gain control at full gain, tone control adjusted for maximum high frequency response, and audio type automatic noise limiter to be turned “off“ if switchable. 2.2.6.1 Standard Receiver Audio Test Level The receiver shall be adjusted to produce a standard audio test level of 10
26、 dB below manufacturers rated audio output power at standard modulation with the signal generator set at 1000 microvolt signal level. . 2.2.7 Associated Equipment The standard associated equipment to be used with the unit under test is that which is supplied by the manufacturer for that unit. 2.2.8
27、Standard Modulation The RF input signal source shall be amplitude modulated at 1000 Hz at such a level to produce 30% modulation. EIA TIA-382-A 30 m 323i.1600 OOOSOfib 3 m EIA/TIA-382-A Page 4 3. RECEIVER SENSITIVITY 3.1 Definition The Receiver Sensitivity of the receiver is the minimum value of inp
28、ut signal that will produce a 10 dB signal plus noise to noise, (S + N)/N, ratio, with standard modulation. 3.2 Method of Measurement A standard input signal source shall be connected to the receiver antenna input terminals. A standard audio output load and voltmeter shall be connected to the audio
29、output terminals, With the signal source set for 1000 UV, the volume control shall be adjusted for the standard audio test level. The standard signal source shall then be adjusted until the ratio of audio output level with standard modulation to the audio output level, without modulation, is 10 dB.
30、3.3 Minimum Standard The Receiver Sensitivity shall be at least 1.0 microvolt under Standard Test Conditions. 4. RECEIVER AUTOMATIC GAIN CONTROL 4.1 Definition The Receiver Automatic Gain Control performance of the receiver is the measure of the ability of the unit to deliver a constant level of aud
31、io output power with input signal levels. 4.2 Method of Measurement A standard signal source with standard test modulation shall be connected to the input of the transceiver and a standard output load with a distortion meter shall be connected in place of a normal output load. The standard signal so
32、urce shall be adjusted for 50,000 microvolts output and the volume control of the transceiver adjusted to 50% rated audio power output. The standard signal source shall be reduced from 50,000 microvolts output until the audio output decreases 10 dB. The signal source output shall be measured at the
33、point where the audio output is reduced 10 dB. The audio power output and distortion versus RF input shall be plotted. The RF output change of the standard signal source shall be noted in dB. EIA TIA-382-A 70 m 3234600 0007067 O m EIA/TIA-382-A Page 5 4.3 Minimum Standard The RF output change in dB
34、required for 10 dB reduction in audio output shall be the measure of AGC performance. Under Standard Test Conditions, the minimum shall be 70 dB and distortion shall not exceed 10%. The output versus input curve shall be smooth and free from dips and discontinuities. 5. RECEIVER AUDIO SQUELCH SENSIT
35、IVITY 5.1 Definition The Receiver Audio Squelch Sensitivity is the minimum level of a standard input signal that, with standard modulation applied, will open the receiver squelch. 5.2 Method of Measurement 5.2.1 Threshold A standard input signal source, with standard modulation applied, shall be con
36、nected to the receiver antenna input terminals. A standard audio output load and voltmeter shall be connected to the audio output terminals of the receiver. The volume control shall be adjusted for the standard audio test level. With no RF signal input to the receiver, the squelch control shall be a
37、djusted to quiet the noise. The RF level of the input signal source shall be increased from zero until the receiver produces continuous audio output within 20 dB of the standard audio test level. The minimum input signal level required to produce this condition is defined as the squelch low threshol
38、d level. a 5.2.2 Tight The RF signal required to produce continuous audio output within 10 dB of the standard audio test level with the squelch control in its maximum position (usually one end of its mechanical range) is defined as the tight squelch. 5.3 Minimum Standards The Receiver Audio Squelch
39、Sensitivity threshold level under Standard Test Conditions shall be no greater than 1 microvolt and the tight level under Standard Test Conditions shall be no greater than 5000 microvolts nor less than 100 microvolts. EIA TIA-382-A 90 M 3234b00 00090b 2 M EIA/TIA-382-A Page 6 6. RECEIVER SELECTIVITY
40、 6.1 Definition Receiver Selectivity is the ability of the receiver to reject a single signal whose frequency is not the same as the channel frequency to which the receiver is tuned. 6.2 Method of Measurement A standard modulated RF signal source is coupled to the receiver antenna input and the audi
41、o output is terminated with the standard load and an audio voltmeter. The volume is adjusted to the standard test audio level. The RF signal level is readjusted for 10 dB (S + N)/N. Then the RF signal frequency is offset to the upper adjacent channel (+ 10 kHz) and its level is increased to obtain a
42、 10 dB (S + N)/N ratio. This process is repeated for the lower adjacent channel (-10 kHz) and again for the next adjacent channels (+ /- 20 kHz). The ratio in dB of the generator level for on channel 10 dB (S + N)/N relative to the smaller level which delivers 10 dB (S t N)/N when it is off channel
43、is recorded. The next adjacent channel selectivity is the smaller of the ratios for the two 10 kHz offsets. The alternate adjacent channel is the smallest of the ratios for offsets of 20 kHz. 6.3 Minimum St andard The minimum Receiver Selectivity for the adjacent channel and for the alternate adjace
44、nt channel shall be 35 dB under Standard Test Conditions. 7. RECEIVER DESENSITIZATION IMMUNITY 7.1 Definition Receiver Desensitization Immunity is the measure of a receivers ability to maintain its sensitivity in the presence of a simultaneous signal which is at a frequency 100 kHz or greater from t
45、he desired signal frequency. EIA TIA-382-A 90 m 3234600 O009069 4 m EIA/TIA3 82-A Page 7 7.2 Method of Measurement Two standard RF signal sources shall be equally coupled to the receiver antenna input through a 6 dB coupler/combiner. A standard audio output load and voltmeter shall be connected to t
46、he receivers audio output. Signal source #1, with standard modulation, is adjusted to 10 dB (S + N)/N sensitivity as in paragraph 3. Signal source #2 is unmodulated, set to a frequency 100 kHz above the desired channel frequency, and increased to the lowest level which reduces the (S + N)/N to 5 dB.
47、 Repeat the above test with signal source #2 set for 100 kHz below the desired channel frequency. The desensitization is reported as the smallest dB ratio between signal source #1 and signal source #2 for spacings of 100 kHz or greater from the desired channel frequency. 7.3 Minimum Standard The min
48、imum Receiver Desensitization Immunity shall be 35 dB under Standard Test Conditions. 8. RECEIVER ADJACENT CHANNEL REJECTION 8.1 Definition Receiver Adjacent Channel Rejection is a measure of a receivers ability to satisfactorily receive a desired signal in the presence of a simultaneous signal whic
49、h differs in . frequency from the desired signal by the width of one channel (10 kHz). e 8.2 Method of Measurement Two standard input signal sources shall be connected to the receivers antenna input terminals through a 6 dB coupler/combiner. A standard audio output load and voltmeter shall be connected to the receivers audio output terminals. With standard modulation applied, signal source #1 shall be adjusted to a level 3 dB greater than the level required to produce 10 dB (S + N)/N. With 400 Hz, 30% modulation applied, signal source #2 shall be first tuned to the high (
