1、BRITISH STANDARD BS 6160-3: 1990 IEC 60489-3: 1988 Incorporating Amendment No. 1 Methods of measurement for radio equipment used in the mobile services Part 3: Receivers employing A3E, F3E or G3E emissions NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS 6160-3:1990 This Brit
2、ish Standard, having been prepared under the direction of the Electronic Equipment Standards Policy Committee, was published under the authority of the Board of BSI and comes into effect on 27 July 1990 BSI 10 May 2002 First published October 1981 Second edition July 1990 The following BSI reference
3、s relate to the work on this standard: Committee reference EEL/25 Draft for comment 84/21922 DC ISBN 0 580 18215 0 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Electronic Equipment Standards Policy Committee (EEL/-) to Technical Commi
4、ttee EEL/25, upon which the following bodies were represented: British Broadcasting Corporation British Radio and Electronic Equipment Manufacturers Association British Telecommunications plc Department of Trade and Industry (Radiocommunications Division) Independent Broadcasting Authority Instituti
5、on of Electrical Engineers Radio Electrical and Television Retailers Association The following bodies were also represented in the drafting of the standard, through sub-committees and panels: British Approvals Board for Telecommunications EEA (the Electronics and Business Equipment Association) ERA
6、Technology Ltd GAMBICA (BEAMA Ltd) OFTEL (Office of Telecommunications) Radio Society of Great Britain Telecommunication Engineering and Manufacturing Association Amendments issued since publication Amd. No. Date Comments 13483 10 May 2002 See national foreword and correction to title of standardBS
7、6160-3:1990 BSI 10 May 2002 i Contents Page Committees responsible Inside front cover National foreword iv Section 1. General 1S c o p e 1 2O b j e c t 1 Section 2. Supplementary definitions and conditions of measurement 3 Supplementary terms and definitions 3 4 Standard test conditions 4 5 Suppleme
8、ntary test conditions 4 6 Characteristics of the measuring equipment 8 Section 3. Methods of measurement for receivers equipped with suitable antenna terminals 7S e n s i t i v i t y 9 8 Acceptable radio-frequency displacement 10 9 Noise-quieting input-signal level 10 10 Audio-frequency response 11
9、11 Total distortion factor 11 12 Relative audio-frequency intermodulation product level 12 13 Squelch characteristics 13 14 Signal-to-residual output-power ratio 15 15 Expander characteristics 16 16 Impulsive noise 17 17 Selectivity 19 18 Automatic gain-control (A.G.C.) characteristic 24 19 Radiated
10、 spurious components 26 20 Conducted spurious components 27 21 Evaluation of the receiving part of the equipment under duplex conditions 28 22 Receiver performance under conditions deviating from standard test conditions 28 Section 4. Methods of measurement for receivers with integral antennas 23 Re
11、ceiver output power 31 24 Radiation sensitivity 33 25 Remarks on measurements requiring the use of a coupling device (radio-frequency and/or acoustic) 38 26 Acceptable radio-frequency displacement 40 27 Noise-quieting input-signal level (under consideration) 40 28 Audio-frequency response (RFCD) 40
12、29 Total distortion factor 41 30 Relative audio-frequency intermodulation product level 42 31 Squelch characteristics 43 32 Signal-to-residual output-level ratio 46 33 Selectivity 46 34 Automatic gain-control (A.G.C.) characteristic 46 35 Dynamic automatic gain-control characteristic 47 36 Impulsive
13、-noise tolerance (integral antenna) 48BS 6160-3:1990 ii BSI 10 May 2002 Page Appendix A Examples of combining networks 49 Appendix B Supplementary recommended methods for testing measuring arrangements 51 Appendix C General information on impulsive noise and the random impulse generator 52 Appendix
14、D Intermodulation responses 56 Appendix E Example of a mains power line impedance stabilization network 57 Appendix F to Appendix H deleted Annex M Rayleigh fading simulators 69 Annex N Accuracy for diversity receiver sensitivity measurement 76 Figure 1 Input-signal source arrangement 4 Figure 2 Exa
15、mple of an arrangement for testing receivers for duplex operation 6 Figure 3 General arrangement for measuring receiver characteristics 9 Figure 4 Arrangement for measuring the relative intermodulation product level 12 Figure 5 Squelch opening and closing levels 13 Figure 6 Noise-quieting input leve
16、l as a function of input-signal frequency in the presence of impulsive noise 23 Figure 7 Example of dynamic A.G.C. characteristic 26 Figure 8 Deleted 26 Figure 9 Measurement arrangements for antenna terminal and a.c power terminal conducted spurious components 27 Figure 10 Arrangements for measuring
17、 the characteristics of receivers having integral antennas 39 Figure A.1 Network for combining two signals 49 Figure A.2 Network for combining three signals 49 Figure A.3 Example of combining network using a hybrid ring 50 Figure A.4 Example of a matching network 51 Figure E.1 Mains power line imped
18、ance stabilization network (also known as an artificial mains network) 58 Figure E.2 Vector diagram of interference voltages 58 Figure E.3 Example of a mains power line impedance stabilization network 59 Figure F.1 Deleted 59 Figure F.2 Deleted 59 Figure G.1 Deleted 59 Figure H.1 Deleted 59 Figure H
19、.2 Deleted 59 Figure J.1 RFCD (stripline) 62 Figure J.2 Detail of stripline load 63 Figure J.3 Detail of stripline input matching resistor 63 Figure J.4 Antenna voltage versus frequency (example) 64BS 6160-3:1990 BSI 10 May 2002 iii Page Figure K.1 Measuring arrangement for radio pagers on a radiati
20、on test site (30 m) 65 Figure L.1 Measuring arrangement for equipment emitting radio-frequency electromagnetic energy (30 m) 68 Table C.I 54 Table C.II 55 Table E.I 57BS 6160-3:1990 iv BSI 10 May 2002 National foreword This Part of BS 6160 has been prepared under the direction of the Electronic Equi
21、pment Standards Policy Committee. It is identical with IEC 489-3:1988, Methods of measurement for radio equipment used in the mobile services Part 3: Receivers employing A3E, F3E or G3E emissions, including amendment 1:1999, published by the International Electrotechnical Commission (IEC). This Part
22、 of BS 6160 supersedes BS 6160-3:1981 which is withdrawn. This Part of BS 6160 should be read, where applicable, in conjunction with BS 6160-1. For the purposes of this British Standard any references to IEC page numbers in the text should be ignored. The start and finish of text introduced or alter
23、ed by amendment is indicated in the text by tags . Tags indicating changes to IEC text carry the number of the IEC amendment. For example, text altered by IEC amendment 1 is indicated by . Cross references The British Standards which implement international or European publications referred to in th
24、is document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Use
25、rs of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, pages 1 to 79 and a back cover. The BSI c
26、opyright notice displayed in this document indicates when the document was last issued.BS 6160-3:1990 BSI 10 May 2002 1 Section 1. General 1 1 Scope This standard refers specifically to mobile radio receivers having audio-frequency bandwidths generally not exceeding 10 kHz for the reception of voice
27、 and other types of signals, using: a) angle modulation frequency modulation (F3E)/phase modulation (G3E), or b) double-sideband amplitude modulation with full carrier (A3E). This standard is intended to be used in conjunction with IEC Publication 60489-1. The supplementary terms and definitions and
28、 the conditions of measurement set forth in this standard are intended for type tests and may also be used for acceptance tests. 2 Object The object of this standard is to standardize the definitions, the conditions and the methods of measurement used to ascertain the performance of receivers within
29、 the scope of this standard and to make possible a meaningful comparison of the results of measurements made by different observers and on different equipment.2 blankBS 6160-3:1990 BSI 10 May 2002 3 Section 2. Supplementary definitions and conditions of measurement 2 3 Supplementary terms and defini
30、tions For the purpose of this standard, the following supplementary terms and definitions apply. 3.1 Output level 3.1.1 rated output level the level, as defined in the equipment specifications, corresponding to: the power at the audio output terminals when these are connected to a specified load; or
31、 the voltage appearing across the output transducer; or the sound pressure; in the absence of a value specified by the manufacturer, the rated output level is 3 dB below the maximum output level 3.1.2 reference output level a) where there is a continuously variable gain control, the reference output
32、 level is that which is 6 dB below the rated output level; b) where there is step-by-step output control, the reference output level is that which is closest to the level defined in step a) above; c) where there is no gain control, the reference output level is the level obtained when the standard i
33、nput signal is applied to the receiver. 3.2 Audio-frequency load For equipment with an integral audio-frequency output transducer, the load is the output transducer. The manufacturer shall specify the method of connection and state the impedance (and tolerance) of the output transducer at 1 000 Hz.
34、It is desirable also to state the impedance at specified upper and lower audio-frequency band limits. 3.2.1 audio-frequency test load an impedance network which replaces the load to which the receiver is connected under normal operating conditions. It simulates the impedance of the normal load and a
35、ny cables with which it is normally used. The network shall be specified by the manufacturer. It usually consists of a single pure resistance. 3.3 standard signal-to-noise ratio ratio of: the power of the signal-plus-noise-plus-distortion; to the power of the noise-plus-distortion at the test load;
36、this ratio is abbreviated as: it is expressed in decibels and is often referred to as SINAD the value of the standard signal-to-noise ratio is 12 dB the standard signal-to-noise ratio allows comparison between different equipment when the standard test modulation is used NOTE Other types and values
37、of signal-to-noise ratio may be used by agreement between the purchaser and the manufacturer. where S is the wanted audio-frequency signal due to standard test modulation; N is the noise with standard test modulation; D is the distortion with standard test modulation;BS 6160-3:1990 4 BSI 10 May 2002
38、 Section 2 3.4 radiation sensitivity of a receiver with an integral antenna, in a given direction (field strength) the field strength required to produce the standard signal-to-noise ratio under specified conditions of operation NOTE 1 An integral antenna is an antenna which is considered to be an i
39、ntegral part of the equipment. In some cases the receiver operates with the antenna inside the housing and in others with the antenna mounted on the exterior of the housing. NOTE 2 For certain applications another characteristic, for example the squelch opening level, may be specified. NOTE 3 In thi
40、s publication, the term “antenna” is synonymous with “aerial”. 3.5 de-emphasis the process intended to restore the original form of a signal which has been transmitted with pre-emphasis NOTE Pre-emphasis may be applied before modulation. 3.6 modulation depth for double-sided amplitude modulation, th
41、e modulation depth, in percent, is given by the following: 4 Standard test conditions Unless otherwise stated, measurements shall be performed under the general test conditions given in IEC Publication 489-1 and the supplementary test conditions described below. 5 Supplementary test conditions 5.1 I
42、nput-signal arrangements for testing receivers equipped with suitable antenna terminals The nominal radio-frequency input impedance (R n ) is that value stated by the manufacturer for which the equipment performance will be optimum when connected to an antenna of the same impedance. where V max is t
43、he peak-to-peak voltage at the crest of modulation; V min is the peak-to-peak voltage at the valley of modulation. 1 = radio-frequency signal generator with source impedance R i 2 = transmission line 3 = impedance matching network (pad) 4 = nominal input impedance of receiver R n 5 = artificial ante
44、nna (where required) R s= impedance of the input-signal source Figure 1 Input-signal source arrangementBS 6160-3:1990 BSI 10 May 2002 5 Section 2 The input-signal level should preferably be expressed as: the electromotive force present at the output of the unterminated input-signal source (e.m.f. of
45、 Figure 1) when the input-signal source impedance (R s ) is equal to the nominal radio-frequency input impedance (R n ) of the receiver. Alternatively, the input signal may be expressed as the matched-load voltage (V ml ) measured across an impedance having a value equal to R n , when the source imp
46、edance (R s ) is equal to the nominal radio-frequency input impedance (R n ). The matched-load voltage (V ml ) is equal to one-half the value of the e.m.f. When the meter that indicates the value of e gis not in close proximity to the receiver input terminals, the transmission line loss shall be tak
47、en into account in addition to the loss of the impedance matching network. 5.1.1 Input-signal source for receivers requiring a specified source resistance This sub-clause applies to receivers which are connected to the antenna by means of a transmission line (synonymous with “feeder line”). The inpu
48、t-signal source shall consist of a radio-frequency signal generator, a transmission line, and an impedance-matching network (pad) placed as close as possible to the receiver under test (see Figure 1, page 4). 5.1.2 Input-signal source receivers tested with the aid of an artificial antenna This sub-c
49、lause is applicable to receivers intended to operate with an antenna having a complex impedance. The input-signal source shall consist of a radio-frequency signal generator, a transmission line, an impedance matching network and an artificial antenna. The characteristics of the artificial antenna shall be specified by the manufacturer of the receiver. 5.2 Input-signal level In this standard, the input-signal level of the wanted and unwanted signals is the r.m.s. voltage of the unmodulated car
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