1、Canadian Standards Association CSA Standard ClO8.1.1-1977 r med 2003) Electromagnetic Interference Measuring Instrument -C.I,SmPmRm Type A Part of the CSA C108.1 Series ISSN 0317-5669 Published, February, 1977 by the Canadian Standards Association flncorporated 79 791 178 Rexdale Boulevard Rexdale,
2、Ontario, Canada M9W 1R3 0 Canadian Standards Association-1977 Canadian Standards Association RcrQle C 108.1.1 -1977 Electromagnetic In terderence Measuring Inst rum en t-C .LS.P. R. Type The attached amendments covering Table 2 and Appendix A have been formally approved. September, 1980 Table 2 (peg
3、e 9)-Revise to read: TABLE 2 VAKIATION IN IN PUT AMPLITUDE WITH FREQUENCY FOR CONSTANT INDiCATlON Repetition Frequency (Hz) 1000 100 (reference) 20 10 2 1 Single Pulse Input Amplitude (dB) 0.15-30 MHz -4.5 2 1.0 0 6.5 2 1.0 10.0 ? 1.5 20.5 ? 2.0 22.5 F 2.0 23.5 2 2.0 30-1000 MHz -8.0 ? 1.0 0 9.0 f 1
4、.0 14.0 +_ 1.5 26.0 f 2.0 28.5 f 2.0 31.5 ? 2.0 September, 1980 .4rnendment No. I ClO8.l.l-1977 Appendh A (page 16)-Add the following C.I.S.P.R. Publication: No. 16-1977, Specification for Radio Interference Measuring Apparatus and Measure men t Met hods. September, 1980 Amendment No. 2 ClO8.1.1-197
5、7 Standards Update ServiceC108.1.1-1977February 1977Title: Electromagnetic interference measuring instrument C.I.S.P.R. typeTo register for e-mail notification about any updates to this publicationgo to shop.csa.caclick on CSA Update ServiceThe List ID that you will need to register for updates to t
6、his publication is 2001022.If you require assistance, please e-mail techsupportcsagroup.org or call 416-747-2233.Visit CSA Groups policy on privacy at csagroup.org/legal to find out how we protect your personal information.Electromagnetic Interference Measuring Instrument-C.I.S.P.R. Type 3 CONTENTS
7、Page 4 Committee on Electromagnetic Interference 5 Preface Measuring Instruments STANDARD 7 7 9 9 9 10 10 10 10 10 10 10 10 11 11 16 1. Scope 2. General 3. Measuring Instrument 3.1 Measuring Instrument Characteristics 3.2 Pulse Response 3. 2.1 Response of Measuring Ixstrument 3.2.2 Variation in Resp
8、onse with Pulse Repetition Frequency .3.3 Selectivity 3. 3.1 Overall Selectivity 3.3. 2 Intermediate-Frequency Rejection Ratio 3. 3.3 Image-Frequency Rejection Ratio 3.3.4 Spurious Response Rejection Ratio 3.4 Intermodulation 3.4. I Degradation of Response 3.4.2 Measurement of IntermoduZation 3.5 In
9、strument Background Noise 3.5.1 Error 3.5.2 Measurement of the Effect of Background ?Joise 3.6 Shielding 3.7 Accuracy Appendix A-Bibliography 4 CSA Standard C108.1.1-1977 TECHNICAL COMMITTEE ON ELE CT ROL4AGNET IC INTE RFE REN CE 14EASURING INSTRUMENTS C.F. Pattenson (Chairman) National Research Cou
10、ncil of Canada, Ottawa, Ontario D.R. Beattie Mississauga, Ontario R. Campbell (Associate) Erie Technological Products Limited, Trenton, Ontario M.B. Crouch Rusint Electronics and Sales Canada Limited, Ottawa , Ontario J.S. Fryer Be.31 Canada, Ottawa, Ontario Representing Canadian Te le communi ca ti
11、 ons Carriers Association F.E. Garlington Sprague Electric Company, North Adams, Massachusetts, U.S.A. A. Holdway Hewlett Packard (Canada) Ltd., Mississauga, Ontario D.E. Jones Ontario Hydro, Toronto Representing Canadian Electrical Association A.R. Lavis Department of Comrnunica- tions, Ottawa, Ont
12、ario R.E. Santo Canadian Broadcasting Corpor.ation, Montreal, Quebec W. Ward Megatronix Limited, Weston, Ontario H.Z. Rogers (Secretary, Non- voti nq) Canadian Standards Association, Rexdale, Ontario T. Higgins Canadian Standards Association, Rexdale, Ontario Electromagnetic Interference Measuring I
13、nstrument-C.Z.S.P.R. Type 5 PREFACE This is the first edition of CSA Standard C108.1.1, Electromagnetic Inferference Measuring Instrument- C.I.S.P.R. Type, which forms part of the CSA C108.1 Series on Electromagnetic Interference Measuring Instruments. It defines the performance character- istics of
14、 an instrument or instruments complying with the requirements of the International Special Committee on Radio Interference of the International Electro- technical Commission. The remaining Standards corn- prising the C108.1 Series are: C108.1.0, Electromagnetic Interference Measurement and Ancillary
15、 Apparatus (in preparation); C108.1.2, Electromagnetic Interference Measuring Instruments Having Characteristics Specified in Existing North American Standards; C108 .l. 3, Spectrum Analysers (proposed) . It should be recognized that this Standard represents the voluntary contributions of the electr
16、ical and communications industries toward the solution of problems that have arisen through the development of the communication services. This Standard was prepared by the Technical Committee on Electromagnetic Interference Measuring Instruments under the jurisdiction of the Standards Steering Com-
17、 mittee on Electromagnetic Interference Compatibility and was formally approved by these Committees. Riesdale, FeSruary, 1977 6 CSA Standard C108.1.1-1977 Note: CSA Standards are subjected to periodic review in order to keep them abreast of progress in the in- dustries concerned. Suggestions for imp
18、rovement will be welcomed at all times. They will be recorded and in due course brought to the attention of the appropriate Commi ttee for consideration. Also, requests for interpretation will be accepted by the Committee. They should be worded in such a manner as to permit a simple yes“ or “no“ ans
19、wer based on the literal text of the requirement concerned. All enquiries regarding this Standard should be addressed to Canadian Standards Association, 178 Rexdale Boulevard, Rexdale, Ontario M9W 1R3. 1. 1.1 - 2. - 2.1 - 3. - 3.1 - 7 C108.1.1-1977 ELECTROMAGNETIC INTERFERENCE MEASURING INSTRUMENT-C
20、.I.S.P.R. TYPE SCOPE This Standard sets forth the characteristics of an instrument conforming to C.I.S.P.R. require- ments for the measurement of electromagnetic interference I both conducted and radiated, in the frequency range 0.15 MHz-1000 I.Wz, as set forth in related CSA Standards on Tolerable
21、Limits of Electromagnetic Interference. The frequency range? methods of use, and tolerable limits are set forth in the applicable Standard. GENERAL The frequency range 0.15 MHz-1000 MHz is divided into three bands: (a) 0.15 MHZ-30 MHz; (b) 30 MHz-300 MHz; (c) 300 MHz-OOO MHz. Any given instrument ma
22、y or may not have the capability of tuning all bands, but it shall comply with this Standard within its tuning range. MEASURING INSTRUMENT Measuring Instrument Characteristics The characteristics of the measuring instrument shall be in accord with Table 1. 8 CSA Standard C103.1.1-1977 TABLE 1 CHARAC
23、TERISTICS OF MEASURING INSTRUMENT Characteristic 6 dB bandwidth Charge time constant Discharge time constant Meter time constant Pre-detection overload factor Post-detection overload factor Input impedance If output impedance Frequency Range (MHz) 3.15-30 9 kHz 1 ms 160 ms 160 rns 30 dB 12 dB 30-300
24、 120 kHz 1 ms 550 ms 100 ms 43.5 dB 6 dB 300-1000 120 kHz 1 ms 550 ms 100 ms 43.5 dB 6 dB 50 ohms unbalanced* I I 50 ohms unbalanced *Additional valiles of input impedance may be provided for. 3.2 Pulse Response 3 2 1 Response of lileasuring Instrument The response of the measuring instrument to pul
25、ses of 0.316 V-S (0.15 MHz-30 MHz) or 0.044 PV-S (30 MHz-1000 MHz) at a pulse repetition frequency of 100 Hz shall at all frequencies within the tuning range be equal to the response to an unmodulated sine wave at the frequency of tuning of 1 mV (60 dB (;lV) rms k 1.5 dB from a signal generator of m
26、atched impedance (see Figure 1). Electromagnetic Interference Measuring Instrument-C.I.S.P.R. Type 9 3.2.2 Variation in Response with Pulse Repetition Frequency The response of the measuring instrument to repeated pulses shall be such that, for constant indication on the indicating meter, the relati
27、on- ship between amplitude and repetition frequency shall be as shown in Figure 1 and lie within the limits given in Table 2. TABLE 2 VARIATION IN INPUT AMPLITUDE WITH FREQUENCY FOR CONSTANT INDICATION Input Amplitude (dB) Repetition Frequency (Ilz ) 3.15 MHz-30. MHz I 1000 10 0 (reference) 20 10 2
28、1 Single Pulse 3.3 3.3.1 3.3.2 Selectivity -4.5 -c 1.0 0 10.0 ? 1.5 20.5 f 2.0 20.5 4 2.0 22.5 5 2.0 23.5 2 2.0 30 MHz-1000 MHz -8.0 k 1.0 0 9.0 ? 1.0 14.5 2 1.5 26.0 k 2.0 28.5 k 2.0 31.5 ? 2.0 Overall Selectivity The curves representing the overall selectivity shall lie within the limits shown in
29、Figures 2 and 3. Intermediate-Frequency Rejection Ratio ratio shall 10 CSA Standard C108.1.1-I977 3.3.3 3.3.4 3.4 - 3.4.1 Image-Frequency Re ection Ratio The image-frequency rejection ratio shall be 40 dB or greater. Spurious Response Rejection Ratio The rej.ection ratio to spurious responses shall
30、be 40 dB or greater. Intermodulation Degradation of Response The response of the measuring instrument shall not b.e ,sensibly degraded by intermodulation effects. The intermodulation of the instrument shall be measured using the procedure outlined in Clause 3.4.2 and shall meet the limits set forth
31、therein. 3.4.2 Measurement of Intermodulation The apparatus for the measurement of intermodula- tion shall be arranged as shown in Figure 4. measuring instrument, tuned to a certain fre- The quency, is preceded by a rejection filter at this frequency. The filter has an insertion loss of 40 dB at the
32、 tuned frequency and a 6 dB bandwidth dependent on the tuning range of the measuring instrument, 1.e. 20 kHz-200 kHz for the range 0.15 WZ-30 FIHz and 0.5 MHz-2 NHz for the range 30 MHz-1000 MHz. When a pulse generator having a substantially uniform spectrum to the upper limit of the tuning range of
33、 the measuring instrument and at least 10 dB down at a frequency twice that of the upper limit is substituted for the signal generator, the attenuation introduced by the filter shall be not less than 36 dB. 3.5 Instrument Backsround Noise 3.5.1 Error - The background noise of the measuring instrumen
34、t shall not introduce an error greater than I dB in the measurement of the wanted signal. The method of measurement of background noise shall be as outlined in Clause 3.5.2. 3.5.2 Measurement of the Effect of Background Noise For a measuring instrunent incorporating an intermediate-frequency attenua
35、tor the measure- ment shall be made as follows: A sine wave Electromagnetic Interference Measuring Instrument-C.I.S.P.R. Type 11 signal is applied to the input of the measuring instrument and its amplitude adjusted to produce a reference deflection 0. An attenuation of 10 dB is then introduced in th
36、e intermediate- frequency amplifier and the amplitude of the input signal is increased to restore the output indication to the reference deflection 0. The increase in the amplitude of the input signal should be between 10 and 11 dB. 3.6 3-7 - Shielding The shielding of the measurinq instrument shall
37、 be such that with the antenna removed and the input terminated and shielded, the indication of field strength shall be 60 dB below the measured value. It shall be possible, under all condi- tions of measurement, to set the gain of the instrument to within k 1 dB of the value used during initial cal
38、ibration. Accur acv The error in the measurement of sine wave voltage shall not be greater than .t- 2 db. Note: The requirements for the accuracy of measurement of repetitive pulses have been discussed in Clauses 3.2.1 and 3.2.2. The effect of the instrument characteristics on its pulse response is
39、shown in Figure 1. 12 CSA Standard ClO8.1.l-1977 Lo cu rc) 0 m I Electromagnetic Interference Measuring Instrument-C.I.S.P.R. Type 13 I1 1 I I1 11 I1 1- IIlIl W!. 1- 14 CSA Standard C108.1.1-1977 -r C. I. S .P. R.+ Publications: No. 1-1972, Specification for C.I.S.P.R. Radio Interference Measuring A
40、pparatus for the Frequency Range 0.15 MHz to 30 MHz; No. 2-1975, Specification for C.I.S.P.R. Radio Interference Measuring Apparatus for the Frequency Range 25 MHz to 300 MHz; No. 4-1967, CISPR Measuring Set Specification for the Frequency Range 300 MHz to 1 000 NHz; No. 5-1967, Radio Interference M
41、easuring Apparatus Having Detectors Other than Quasi-peak. *The Ins ti tute of Electrical and Electronics Engineers, Inc. Comi te International Spgcial des Perturbations Radioglectriques. I consent to CSA collecting and using the above information to facilitate the collection of my suggestions and c
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