IS 15039 (2001): Information Technology Equipment
Contents
1. ISO 9241 3 1992 Ergonomic requirements for office work with visual display terminals VDTs Part 3 Visual display requirements ITU T Recommendation 1 241 1 Telephony ITU T Recommendation 1 411 Integrated service digital network ISDN user network interfaces ITU T Recommendation K 15 Protection of high capacity transmission systems against overvoltages and HF disturbances ITU T Recommendation K 17 Tests on power fed repeaters using solid state devices in order to check the arrangements for protection from external interferences ITU T Recommendation K 20 Resistibility of telecommunication switching equipment overvoltages and overcurrents ITU T Recommendation K 21 Resistibility of subscribers terminals overvoltages and overcurrents ITU T Recommendation K 22 Overvoltage resistibility of equipment connected to an ISDN T S bus Blue Book Volume IX November 1988 3 Definitions For the purpose of this publication the definitions contained in the following documents apply ITU T Recommendation 1 411 60050 161 International Electrotechnical Vocabulary IEV Chapter 161 In addition the following specific definitions apply 3 1 continuous wave CW Electromagnetic waves the successive oscillations of which are sinusoidal and identical under steady state conditions which can be interrupted or modulated to convey information IS 15039 2001 CISPR 24 1997 3 2 degradation The unwanted change2. area MOtwOrks tet e 25 D Printers ERE EE E 26 Copying machino 27 F Automatic teller macnines 28 G Pointotsale terminals POS E cee 30 IS 15039 2001 CISPR 24 1997 As in Original Standard this Page is Intentionally Left Blank IS 15039 2001 CISPR 24 1997 Indian Standard INFORMATION TECHNOLOGY EQUIPMENT IMMUNITY CHARACTERISTICS LIMITS AND METHODS OF MEASUREMENT 1 Scope and object This CISPR publication applies to information technology equipment ITE as defined in CISPR 22 Procedures are defined for the measurement of ITE and limits are specified which are developed for ITE and within the frequency range from 0 Hz to 400 GHz The object of this publication is to establish requirements which will provide an adequate level of intrinsic immunity so that the equipment will operate as intended in its environment For exceptional environmental conditions special mitigation measures may be required Owing to testing and performance assessment considerations some tests are specified in defined frequency bands or at selected frequencies Equipment which fulfils the requirements at these frequencies is deemed fulfil the requirements in the entire frequency range from Hz to 400 GHz for electromagnetic phenomena The object of this pu
3. used in audiometry IS 15039 2001 CISPR 24 1997 61000 4 2 1995 Electromagnetic compatibility EMC Part 4 Testing and measurement techniques Section 2 Electrostatic discharge immunity test Basic EMC Publication 61000 4 3 1995 Electromagnetic compatibility EMC Part 4 Testing and measurement techniques Section 3 Radiated radio frequency electromagnetic field immunity test Basic EMC Publication 61000 4 4 1995 Electromagnetic compatibility EMC Part 4 Testing and measurement techniques Section 4 Electrical fast transient burst immunity test Basic EMC Publication 61000 4 5 1995 Electromagnetic compatibility EMC Part 4 Testing and measurement techniques Section 5 Surge immunity tests Basic EMC Standard 61000 4 6 1996 Electromagnetic compatibility EMC Part 4 Testing and measurement techniques Section 6 Immunity to conducted disturbances induced by radio frequency fields IEC 61000 4 8 1993 Electromagnetic compatibility EMC Part 4 Testing and measurement techniques Section 8 Power frequency magnetic field immunity test 61000 4 11 1994 Electromagnetic compatibility EMC Part 4 Testing and measurement techniques Section 11 Voltage dips short interruptions and voltage variations immunity tests CISPR 22 1997 Information technology equipment Radio disturbance characteristics Limits and methods of measurement
4. where the TTE is intended to provide a data non voice service the time required for a transmission shall not as a consequence of the application of the test increase beyond that defined by the manufacturer For ISDN equipment for primary access only the following also applies The number of loss of frame alignments shall be less than 10 within a test period of 10 seconds Where it can be clearly established that a voice call is maintained throughout the test it is not then required to evaluate the loss of frame alignment Performance criterion B The following shall be fulfilled A call established prior to the application of the phenomena shail be maintained Requirements to be checked after the application of the phenomena the shall be able to establish a call the shall be able to receive call the TTE shall be able to clear a call Performance criterion C Requirements to be checked after the application of the phenomena the TTE shall be able to establish a call the TTE shall be able to receive a call the TTE shalli be able to clear a call 19 IS 15039 2001 CISPR 24 1997 A 3 Facsimile A 3 1 Particular test conditions The EUT shall be connected to a second EUT or simulator which permits a test pattern to be sent to and be received from the EUT A test pattern selected from the relevant ITU T recommendation is preferred but is not mandatory The following requirements ar
5. Functions and or information stored in non volatile memory or protected by a battery backup shall not be lost 7 2 Particular performance criteria The particular performance criteria which are specified in the normative annexes take precedence over the corresponding parts of the general performance criteria Where particular performance criteria for specific functions are not given then the general performance criteria shall apply 8 Product documentation The specification used by the manufacturer to define the performance criteria for the testing required by this standard shall be made available to the user upon request Environmental phenomenon 1 1 Power frequency magnetic field Table 1 Immunity enclosure port Units Basic Remarks Performance standard criterion Hz 61000 4 8 1 A m r m s See annex B 1 2 Radio frequency lt 80 1 000 MHz 61000 4 3 The test level specified A electromagnetic field 3 V m unmodulated is prior to modulation Amplitude modulated See 2 and 3 Electrostatic discharge 61000 4 2 1 kHz 1 Applicable only to equipment containing devices susceptible to magnetic fields such as CRT monitors Hall elements electrodynamic microphones magnetic field sensors etc Test specification 50 or 60 1 4 Contact discharge kV charge voltage 8 Air discharge kV charge volta
6. be used if non linearity is experienced due to for example saturation of screening material The EUT shall be tested in two positions both perpendicular to the magnetic field Performance criterion Screen disturbances during the application of the test are permissible Performance criterion C Failures which are not self recovered after removal of the external disturbance but which can be recovered to normal operation by reset or reboot are permissible B 3 Data input B 3 1 Particular test conditions Data shall be acquired with input devices such as keyboard mouse magnetic card reader optical character reader image scanner input pen or miscellaneous sensors Though continuous input is preferable testing in the stand by condition is permitted for equipment which requires operator s attendance for operation 22 IS 15039 2001 CISPR 24 1997 When the EUT is a mass data input device such as a character reader or scanner then the central processing unit shall run a program which reads an appropriate test chart continuously for the duration of the test Read data inputs are displayed printed directly or stored for later evaluation B 3 2 Particular performance criteria Performance criterion A Unintended input from input device is not allowed Input devices shall maintain the specified quality image data Performance criterion B Keyboard mouse lock is not allowed For equipment with manually
7. can repeat the sequences for functions of equipment and in case of failure enable an operator to recognise the nature of failure by display or by operator s operation The test sequences shall be selected from the following below according to the functions defined by the manufacturer of the equipment to be tested and the performance criteria A B or G shall be selected according to the disturbance to be tested B 1 Read write and storage of data B 1 1 Particular test conditions Data read and write cycles shall be repeated with internal storage devices such as semi conductor memories magnetic or optical disks or magnetic tape devices and then the copied back data shall be compared with the original Read only memories ROM shall be read repeatedly and this data compared with the expected data B 1 2 Particular performance criteria Performance criterion A Storage devices shall maintain normal operation both in read write and in stand by conditions Performance criterion B Failures which can be recovered by read and write retries are permissible temporary delay in processing caused by this process is acceptable Normal operation of the EUT shall be restored after the test self recovery to the conditions immediately prior to the application of the test is accepted where this is a normal means of recovery In these cases operator response is permitted to re initialise an operation Performance criterion C Failures resulting i
8. direction shall greater than the values given in table A 3 17 IS 15039 2001 CISPR 24 1997 Table 3 Maximum demodulated differential mode noise and acoustic sound pressure levels at the telecommunications port and at the acoustic receiving device measurement method 1 Type of Demodulated Acoustic sound piequency pang immunity differential mode noise pressure level MHz dB spl 30 to 40 66 Conducted 40 66 to 40 70 Conducted 40 70 to 80 Conducted 80 to 1 000 except at 900 Radiated Radiated This requirement is not applicable for countries where no digital mobile services operating at 900 MHz exist See note to table A 1 Measurement method 2 The volume control where it exists shall be set at a fixed level during calibration and shall not be changed during the test The following shall be fulfilled during a sweep in the whole specified frequency range the shall be able to maintain an established call for supporting telephony service the following also applies with the audio channel open and active the demodulated differential mode noise and acoustic sound pressure level from the EUT measured in the assigned B channel shall not be greater than the values given table The measurement bandwidth shall be 100 Hz maximum at 1 kHz for having an acoustic interface the following also applies An A law coded digital si
9. frequency range the TTE shall be able to maintain an established call for TTE supporting telephony service the following also applies the demodulated narrowband 1 kHz maximum measurement bandwidth of 100 Hz differential mode signal measured on the telecommunications port shall not be greater than the values given in table A 1 measured at the TTE nominal impedance as specified by the manufacturer for TTE having an acoustic interface the following also applies the acoustic demodulated sound pressure level spl in the receive direction shall not greater than the values given in table A 1 14 iS 15039 2001 CISPR 24 1997 Table 1 Maximum acoustic demodulated levels at the telecommunications port and at the acoustic receiving device measurement method 1 Type of immunity test Acoustic sound F requency band pressure level Noise signal MHz dBm dB spl C eene _ gt This requirement is not applicable for countries where no digital mobile services operating at 900 MHz exist NOTE These tests are designed to ensure a minimum acceptable immunity to amplitude modulated radio frequency disturbances for devices having acoustic interfaces The demodulated disturbance levels are higher than those that will be found acceptable in practice The levels in the tests have been chosen for their practical test convenience having regard for the maximum allowed backgrou
10. inputted data which can be confirmed by reading the display errors which can be recognised by the operator and easily corrected are permissibie Performance criterion C Failures resulting in a delay in processing after the external disturbance is removed but which can be recovered to normal operation by reset or reboot are permissible Failures resulting in a system abort which can be recovered to normal operation by reset or reboot are permissible B 4 Data printing B 4 1 Particular test conditions Data shall be printed by printers or plotters For equipment which has several operation modes test shall be selected in the most typical operation mode B 4 2 Particular performance criteria Performance criterion A Printers shall maintain the specified printing quality and normal operation Performance criterion B No degradation of the printing quality beyond the manufacturer s specification such as distortion of character s or missing pixels is permissible Performance criterion C Printing errors or omission of character s which require reprinting are permissible Input output failure which can be recovered to normal operation by reset or reboot are also permissible 23 IS 15039 2001 CISPR 24 1997 B 5 Data processing B 5 1 Particular test conditions Data processing such as computation data conversion storage or transfer shall be performed and the results of processing shall compared with resul
11. performance as described in criterion A is permitted provided that the normal operation of the EUT is self recoverable to the condition immediately before the application of the test In these cases operator response is permitted to re initiate an operation Performance criterion C There shall be no loss of function following the restoration of the system by the operator Loss or corruption of the contents of Random Access Memory RAM and information stored on permanent storage media such as hard drive optical or floppy disk is not permitted Degradation of the performance as described in criteria A and B is permitted provided that the normal operation of the EUT is self recoverable or can be restored after the test by the operator 29 IS 15039 2001 CISPR 24 1997 Annex G normative Point of sale terminals POST G 1 Particular test conditions The Point of Sale Terminal POST shall be connected to each of its peripheral devices such as scales scanner card reader and one of each type of communication line shall be connected to the correct terminating equipment or a representative load Interconnecting cables shall be of a type and length specified in the individual equipment requirements One subassembly of each type of ITE necessary for the basic operation shall be included in the POST to be evaluated For a system one of each type of ITE that can be included in the possible system configuration shall be included in t
12. shall be assessed C 2 Particular performance criteria Performance criterion A During and after the test the EUT shail operate without error rate beyond the figure defined by the manufacturer requests for retry beyond the figure defined by the manufacturer speed of data transmission rate beyond the figure defined by the manufacturer protocol failure loss of link Performance criterion B Error rate request for retry and speed of data transmission rate may be degraded during the application of the test Degradation of the performance as described in criteria A is permitted provided that the normal operation of the EUT 15 self recoverable to the condition immediately before the application of the test In these cases operator response is permitted to re initiate an operation Performance criterion C Degradation of the performance as described in criteria A and B is permitted provided that the normal operation of the EUT is self recoverable to the condition immediately before the application of the test or can be restored after the test by the operator 25 IS 15039 2001 CISPR 24 1997 Annex D normative _ Printers D 1 Particular test conditions Data shall be printed with printers or plotters No standard image is required but the use of a text containing more than three character fonts and at least one grid of lines is recommended Character pitch and line spacing should be small If the dot
13. 20 BIS 2001 BUREAU OF INDIAN STANDARDS MANAK BHAVAN 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002 October 2001 Price Group 11 Electromagnetic Compatibility Sectional Committee LTD 22 NATIONAL FOREWORD This Indian Standard which is identical with CISPR 24 1997 Information technology equipment Immunity characteristics Limits and methods of measurements issued by the Special Committee on Radio Interference CISPR was adopted by the Bureau of Indian Standards on the recommendation of the Electromagnetic Compatibility Sectional Committee and approval of the Electronics and Telecommunication Division Council In the adopted standard certain conventions are not identical to those used in Indian Standards Attention is particularly drawn to the following a Wherever the words International Standard appear referring to this standard they should be read as Indian Standard b Comma has been used as a decimal marker while in Indian Standards the current practice is to use a point as the decimal marker CROSS REFERENCES In this adopted standard reference appears to certain International Standards for which Indian Standards also exist The corresponding Indian Standards which are to be substituted in their place are listed below along with their degree of equivalence for the editions indicated International Corresponding Degree of Standard Indian Standard Equivalence 60050 161 1990 Internatio
14. A h h h h k k k k k k k k k k k Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities in order to promote transparency and accountability in the working of every public authority and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public particularly disadvantaged communities and those engaged in the pursuit of education and knowledge the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public bl 19 Aare Bl BIS TT AH Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru The Right to Information The Right to Live Step Out From the Old to the New memes 2001 Information Technology Equipment Characteristics Limits and Methods of Measurement LITD 9 Electromagnetic Compatibility Satyanarayan Gangaram Pitroda Bhartrhari Nitisatakam oo OO kkk oo kkk BLANK PAGE PROTECTED BY COPYRIGHT IS 15039 2001 CISPR 24 1997 WNT AAP Waal after Aa ol ara Indian Standard INFORMATION TECHNOLOGY EQUIPMENT IMMUNITY CHARACTERISTICS LIMITS AND METHODS OF MEASUREMENT ICS 33 100
15. actical to simulate these measures during the tests then the applied test levels shall be reduced to 0 5 kV and 1 kV 13 5 15039 2001 CISPR 24 1997 Annex A normative Telecommunications terminal equipment 1 Telecommunications terminal equipment having an analogue interface A 1 1 Particular test conditions The telecommunications terminal equipment TTE shall be configured for connection to a telecommunication line or reference line at its nominal impedance Auxiliary equipment may be used to simulate the telecommunications network A 1 2 Particular performance criteria The following performance criteria are applicable only when the functions are implemented Performance criterion A a Swept frequency test Testing shall be carried out in accordance with one of the two measurement methods described below In case of dispute tests shall be carried out as originally performed Measurement method 1 The volume control where it exists shall be set as close as possible to the position which gives the nominal value as stated by the manufacturer The acoustic sound pressure level spl shall be measured using a calibrated artificial ear as defined in IEC 60318 coupled without loss to the acoustic receiving device of the TTE The background acoustic noise shall be less than 40 dB spl The audio channel shall be open and active The following shall be fulfilled during a sweep in the whole specified
16. be shown by checking the data sent to the line to avoid having an operator in the field the shall be able to establish a call with telephony service the TTE shall be able to receive a call the shall be able to clear a call where the TTE is intended to provide a data non telephony service the time required for a transmission shall not as a consequence of the application of the test increase beyond that defined by the manufacturer Performance criterion B The following shall be fulfilled A call established prior to the application of the disturbance shall be maintained Requirements to be checked after the application of the disturbance the shall be able to establish a call the shall be able to receive a call the shail be able to clear a call Performance criterion C Requirements to be checked after the application of the disturbance the shall be able to establish a call the TTE shall be able to receive call the shail be able to clear a call 16 IS 15039 2001 CISPR 24 1997 2 Telecommunications terminal equipment having a digital interface A 2 1 Particular test conditions The shall be configured for connection to a telecommunication line or reference line at its nominal impedance Auxiliary equipment may be used to simulate the telecommunications network For digital basic access ISDN int
17. been carried out to a lower frequency then the test range shall only extend up to this frequency 12 5 15039 2001 CISPR 24 1997 Table 4 Immunity input power ports including equipment marketed with a separate a c d c power converter Environmental Test Basic Performance Patera 4 4 Radio frequency 0 15 80 MHz 61000 4 6 See 1 and 3 continuous conducted 3 V unmodulated 5 80 AM 1 kHz 4 2 Voltage dips gt 95 reduction 61000 4 11 0 5 period 30 reduction 25 periods 44 Surges 1 2 50 8 20 Tr Th ps 61000 4 5 See 4 1 line to line kV peak ground 4 5 Fast transients 1 0 61000 4 4 5 50 functional test shall be carried out at a limited number of frequencies The selected frequencies for conducted test are 0 2 1 7 1 13 56 21 27 12 and 40 68 MHz 1 4 3 Voltage interruptions gt 95 reduction 61000 4 11 See 2 250 periods 2 line to earth kV peak 1 The frequency range is scanned as specified However when specified in annex A an additional comprehensive 2 Changes to occur at 0 degree crossover point of the voltage waveform kV peak Tr Th ns Repetition frequency kHz 3 If the radiated test has been carried out to a lower frequency then the test range shall only extend up to this frequency 4 When the manufacturer specifies protection measures and it is impr
18. ble is provided this earth connection shall be installed according to the specifications of the manufacturer for the tests given in tables 1 to 4 at all other ports IS 15039 2001 CISPR 24 1997 6 2 Particular conditions EUT operational modes etc The particular conditions specified in the annexes take precedence over the corresponding parts of the general conditions Where particular conditions for specific functions are not given in this standard then the general conditions shall apply 7 Performance criteria The manufacturer has the obligation to express the performance criteria in terms which relate to the performance of his specific product when used as intended The following performance criteria are applicable and shall only be evaluated when the functions referred to are implemented 7 1 General performance criteria Examples of functions defined by the manufacturer to be evaluated during testing include but are not limited to the following essential operational modes and states tests of all peripheral access hard disks floppy disks printers keyboard mouse etc quality of software execution quality of data display and transmission quality of speech transmission Performance criterion A The equipment shall continue to operate as intended without operator intervention No degradation of performance or loss of function is allowed below a performance level specified by the manufac
19. blication is to define the immunity test requirements for equipment defined in the scope in relation to continuous and transient conducted and radiated disturbances including electrostatic discharges ESD The test requirements are specified for each port considered NOTES 1 Safety considerations are not covered in this publication 2 in special cases situations will arise where the level of disturbance may exceed the levels specified in this publication for example where a hand held transmitter is used in proximity to an equipment In these instances special mitigation measures may have to be employed 2 Normative references The following normative documents contain provisions which through reference in this text constitute provisions of this International Standard For dated references subsequent amendments to or revisions of any of these publications do not apply However parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below For undated references the latest edition of the publication referred to applies Members of ISO and maintain registers of currently valid International Standards 60050 161 1990 International Electrotechnical Vocabulary Chapter 161 Electromagnetic compatibility 60318 1970 An IEC artificial ear of the wideband type for the calibration of earphones
20. communication network 3 16 telephony service A service providing users with the ability for real time two way speech conversation via a network see ITU T Recommendation 1 241 1 3 17 telecommunications terminal equipment Equipment intended to be connected to a public or private telecommunications network that 15 a to be connected directly to the termination of a telecommunications network in order to send process or receive information or b to interwork with a telecommunications network being connected directly or indirectly to the termination of a telecommunications network in order to send process or receive information 4 Immunity test requirements 4 1 General The immunity test requirements for equipment are given on a port by port basis Tests shall be conducted in a well defined and reproducible manner The tests shall be carried out as single tests in sequence The sequence of testing is optional The description of the test the test generator the test methods and the test set up are given in IEC basic EMC standards which are referred to in the following tables The contents of these IEC basic EMC standards are not repeated here however modifications or additional information needed for the practical application of the tests are given in this publication 42 Particular requirements 4 2 1 Electrostatic discharges ESD Static electricity discharges shall be applied only to those points and surfaces of the EUT
21. density can be selected the highest density shall be chosen Tests shall be carried out with the EUT in the printing mode D 2 Particular performance criteria Performance criterion A The EUT shall operate without degradation of performance during and after the application of the disturbance For example there shall be no loss or corruption of data during input output operations degradation of the printed image beyond the manufacturer s specification change in output mode or character font perceptible change in dot pitch unintended line or page feed Performance criterion B As for performance criterion A with the following exceptions degradation of the printed image beyond the manufacturer s specification is allowed misalignment of the grid lines is allowed unintended line feed is allowed After the disturbance is removed normal operation of the EUT is self recoverable to the condition immediately before the application of the test this may involve an operator response to re initiate the operation Performance criterion Degradation of the performance as described in criteria A and B is permitted provided that the normal operation of the EUT is self recoverable to the condition immediately before the application of the test or can be restored after the test by the operator 26 IS 15039 2001 CISPR 24 1997 Annex E normative Copying machines E 1 Particular test condition
22. dicates that changes are needed it is taken up for revision Users of Indian Standards should ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of BIS Handbook and Standards Monthly Additions This Indian Standard has been developed from Doc No LTD 22 1905 Amendments Issued Since Publication Amend No Date of Issue Text Affected BUREAU OF INDIAN STANDARDS Headquarters Manak Bhavan 9 Bahadur Shah Zafar Marg New Delhi 110002 Telegrams Manaksanstha Telephones 323 01 31 323 3375 323 94 02 Common to all offices Regional Offices Telephone Central Manak Bhavan 9 Bahadur Shah Zafar Marg 323 76 17 323 38 41 NEW DELHI 110002 Eastern 1 14 C I T Scheme M V I P Road Kankurgachi 337 84 99 337 85 61 CALCUTTA 700054 337 86 26 337 91 20 Northern SCO 335 336 Sector 34 A CHANDIGARH 160022 60 38 43 60 20 25 Southern C I T Campus Cross Road CHENNAI 600113 254 12 16 254 14 42 0254 25 19 254 13 15 Western Manakalaya E9 MIDC Marol Andheri East 832 92 95 832 78 58 MUMBAI 400093 832 78 91 832 78 92 Branches AHMEDABAD BANGALORE BHOPAL BHUBANESHWAR COIMBATORE FARIDABAD GHAZIABAD GUWAHATI HYDERABAD JAIPUR KANPUR LUCKNOW NAGPUR NALAGARH PATNA PUNE RAJKOT THIRUVANANTHAPURAM Printed at Simco Printing Press Delhi
23. differential mode noise on the telecommunications port measured at the TTE nominal impedance as specified by the manufacturer shall not be greater than the values given in table A 1 The measurement bandwidth shall be 100 Hz maximum at 1 kHz for TTE having an acoustic interface the following also applies a sinusoidal signal of 1 kHz 40 dBm is impressed on the telecommunication line signal level without the radio frequency field The resulting acoustic sound leve is measured using a microphone The measured evel shall be used and recorded as the reference level The signal used to establish the reference level is switched off during the actual test The measurement bandwidth shall be 100 Hz maximum The background noise shall not exceed a levei 15 dB below the reference level The demodulated differential mode noise in the receive direction measured in the way described for the reference ievel shall not be greater than the values given table A 2 15 IS 15039 2001 CISPR 24 1997 Table A 2 Maximum demodulated differential mode noise levels at the telecommunications port measurement method 2 MHz immunity test dBm This requirement 5 not applicable for countries where no digital mobile services operating at 900 MHz exist See note to table 4 b Selected frequency test The following shall be fulfilled at the spot frequencies specified in tables 1 2 3 and 4 this may
24. e in addition to the TTE performance requirements A 3 2 Particular performance criteria Performance criterion A The EUT shall operate normally during and after the test without data transfer errors for example no retries beyond the specified maximum degradation of the printed image beyond the manufacturer s specification missing text either full or partial for example decapitated letters unintended line or page feed colour change beyond the manufacturer s specification re initiating a call Performance criterion B As for performance criteria A with the following exceptions which are permitted during the application of the disturbance provided that normal operation of the EUT is recoverable to the condition immediately before the application of the disturbance degradation of the printed image beyond the manufacturer s specification unintended line feed Performance criterion C Any degradation of performance is permitted provided that normal operation is self recoverable or can be restored after the test by the use of operator controls and provided that any interruptions in the transmission are logged and the user notified the EUT can re establish a call the EUT can receive a call the EUT can clear a 20 IS 15039 2001 CISPR 24 1997 Annex B normative Data processing equipment The test shall be carried out using an exercising program which
25. erfaces providing telephony service to the shall be in idle mode as defined for the applied digital to analogue conversion A 2 2 Particular performance criteria The following performance criteria are applicable only when the functions are implemented Performance criterion A a Swept frequency test Testing shall be carried out in accordance with one of the two measurement methods described below in case of dispute tests shall be carried out as originally performed Measurement method 1 The volume control where it exists shall be set as close as possible to the position which gives the nominal value as stated by the manufacturer The acoustic sound pressure level spl shall be measured using a calibrated artificial ear as defined in IEC 60318 coupled without loss to the acoustic receiving device of the The background acoustic noise shall be less than 40 dB spl The audio channe shall be open and active The following shall be fulfilled during sweep in the whole specified frequency range the TTE shall be able to maintain an established call for TTE supporting telephony service the following also applies the demodulated differential mode noise and acoustic sound pressure levels in the receive direction shall not be greater than the values given in table A 3 for having an acoustic interface the following also applies the acoustic demodulated sound pressure level spl in the receive
26. ge 2 The frequency range is scanned as specified However when specified in annex A an additional comprehensive functional test shall be carried out at a limited number of frequencies The selected frequencies are 80 120 160 230 434 460 600 863 and 900 MHz 1 3 The test may be performed with a start frequency lower than 80 Mhz but not less than 26 MHz 11 IS 15039 2001 CISPR 24 1997 Table 2 Immunity signal ports and telecommunication ports Environmental Test nite Basic Performance phenomenon specification standard criterion 2 1 Radio frequency 0 15 80 MHz 61000 4 6 See 1 3 and 4 continuous conducted V unmodulated r m s AM 1 kHz 2 2 1 5 kV peak ITU T Rec See 2 and 5 See ITU T 4 KV K series Rec 10 700 ps K series 2 3 Fast transients kV peak Tr Th ns Repetition frequency kHz 1 The frequency range is scanned as specified However when specified in annex A additional comprehensive functional test shall be carried out at a limited number of frequencies The selected frequencies for conducted tests are 0 2 1 7 1 13 56 21 27 12 and 40 68 MHz 1 2 Applicable only to ports which according to the manufacturer s specification may connect directly to outdoor cables 3 Applicable only to cables which according to the manufacturer s specification supports communication on cable lengths greater tha
27. gnal representing a sinusoidal signal of 1 kHz 40 dBmO is impressed on the telecommunication line signal level without the radio frequency disturbance The resulting acoustic sound pressure level is measured using a microphone The measured level shall be used and recorded as the reference level The signal used to establish the reference level is switched off during the actual test The measurement bandwidth shall be 100 Hz maximum During the test the idle code shall be sent to the EUT in the assigned B channel The background noise shall not exceed a level 15 dB below the reference level The demodulated differential mode noise in the receive direction measured in the way described for the reference level shall not be greater than the values given in table A 4 18 IS 15039 2001 CISPR 24 1997 Table 4 Maximum demodulated differential mode noise levels measurement method 2 Frequency band Type of immunity test Demodulated differential mode noise MHz _ This requirement is not applicable for countries where no digital mobile services operating at 900 MHz exist See note to table A 1 b Selected frequency test The following shall be fulfilled at the spot frequencies specifed in tables 1 2 3 and 4 the TTE shall be able to establish a call with telephony service the shall be able to receive a call the TTE shall be able to clear a call
28. he test operator to select certain functions if so desired A parallel or serial execution of the test is permitted provided that the ATM can operate in that manner To facilitate the testing the software shall alert the operator when a failure has occurred The ATM shall be operated using the default settings upon start up The ATM shall be evaluated in all modes unless the most susceptible mode is already known from preliminary testing or previous experience in which case the most susceptible mode shall be used F 2 Particular performance criteria Performance criterion A The EUT shall operate without degradation of performance during and after the application of the disturbance For example there shall be no system response time beyond the figure defined by the manufacturer memory errors data corruption repeated self recoverable errors beyond a number specified by the manufacturer loss of stored data keyboard lock up system reset or shut down 28 IS 15039 2001 CISPR 24 1997 system change state network connections dropping money receipts inappropriately dispensed errors state change Performance criterion B There shall be no loss of stored data during the application of the disturbance A transaction may be aborted provided that this is correctly reported There shall be no incorrect dispensing of money or printed receipts Degradation of the
29. he POST In the case of POSTs which functionally interact with other ITE including any ITE that is dependent on the Central Processing Unit CPU for its power interface either the actual interfacing EUT or simulators may be used to provide representative operating conditions provided the effects of the simulator can be isolated or identified Note that it 15 important that any simulator used instead of the actual interfacing ITE properly represents the electrical and in some cases the mechanical characteristics of the interfacing ITE especially RF signals and impedances The POST shall execute a program which shall exercise each function whose integrity is to be assessed during the test As a minimum the functions noted below shall be assessed Where more than one function is to be assessed the software shall be flexible enough to permit the test operator to select certain functions if so desired A parallel or serial execution of the test is permitted provided that the POST can operate in this manner To facilitate the testing the software shall alert the operator when a failure has occurred The POST shall be operated in the condition that was found to produce the highest overall emissions if this is not known the default settings upon start up The POST shall be evaluated in all modes unless the most susceptible mode is already known from preliminary testing or previous experience in which case the most susceptible mode shall be u
30. in operational performance of an EUT due to electromagnetic disturbances This does not necessarily mean malfunction or catastrophic failure 3 3 equipment under test EUT A representative ITE or functionally interactive group of ITE that is a system which includes one or more host units and is used for evaluation purposes 3 4 information technology equipment ITE The definition of ITE is as described in CISPR 22 3 5 jitter of a cathode ray tube CRT monitor Peak to peak variation in the geometric location of picture elements on the viewing surface of the CRT monitor 3 6 temporal instability flicker The perception of unintended temporal variation luminance 3 7 port Particular interface of the specified equipment with the external electromagnetic environment see figure 1 Enclosure port DC power port Earth port Information technology AC power port equipment Signal port Telecommunication port Figure 1 Description of ports 3 8 enclosure port The physical boundary of the equipment through which electromagnetic fields may radiate or impinge For plug in units the physical boundary will be defined by the host unit 3 9 cable port A point at which a conductor or a cable is connected to the equipment Examples are signal and power ports 3 10 a telephony call The process exercised in the network and the telecommunication terminal equipment TTE to allow interchange of information speech video o
31. llowing qualifications and exceptions output input failures are only allowed if normal operation can be restored by reset reboot unintended start of copying from stand by mode is allowed 27 IS 15039 2001 CISPR 24 1997 Annex F normative Automatic teller machines ATM F 1 Particular test conditions The ATM shall be connected to each of its peripheral devices and one of each type of communication line shall be connected driven into the correct terminating equipment or a representative load Interconnecting cables shall be of a type and length specified in the individual equipment requirements One subassembly of each type of ITE necessary for the basic operation shall be included in the ATM to be evaluated For a system one of each type of ITE that can be included in the possible system configuration shall be included with the ATM In the case of ATMs which functionally interact with other ITE including any ITE that is dependent on the ATM for its power interface either the actual interfacing EUT or simulators may be used to provide representative operating conditions provided the effects of the simulator can be isolated or identified The ATM shall execute a program which shall exercise each function whose integrity is to be assessed during the test As a minimum the functions noted below shall be assessed Where more than one function is to be assessed the software shall be flexible enough to permit t
32. n 3 4 ifthe radiated test has been carried out to a lower frequency then the test range shall only extend up to this frequency 5 For ports where primary protection is intended surges are applied at voltages up to 4 kV with the primary protecters fitted Otherwise the 1 5 kV best level is applied without primary protection in place Table 3 Immunity input power port excluding equipment marketed with a c d c power converter if d c power is fed on conductors included in a signal cable then the requirements of table 2 only apply to this cable Environmental Test Units Basic Remarks Performance phenomenon specification standard criterion Radio frequency 0 15 80 MHz 61000 4 6 See 1 and 3 continuous couducted V unmodulated r m s AM 1 kHz 1 2 50 8 20 Tr Th ps kV peak 61000 4 5 Test applied lines to earth ground See 2 1 The frequency range is scanned as specified However when specified in annex A an additional comprehensive functional test shal be carried out at a limited number of frequencies The selected frequencies for conducted test are 0 2 1 7 1 13 56 21 27 12 and 40 68 MHz 1 2 Applicable only to ports which according to the manufacturer s specification may connect directly to outdoor cables Fast transients kV peak ns Repetition frequency kHz 3 Ifthe radiated test has
33. n a delay in processing after the external disturbance is removed but which can be recovered to normal operation by reset or reboot are permissible Failures resulting in a system abort which can be recovered to normal operation by reset or reboot are permissible 21 IS 15039 2001 CISPR 24 1997 B 2 Data display B 2 1 Particular test conditions Text or graphics shall be displayed on display devices such as CRT monitors and liquid crystal plasma or LED displays B 2 2 Particular performance criteria Performance criterion A When seen from the normal viewing distance the EUT shall operate with no change beyond the manufacturer s specification in flicker colour focus and jitter except for the power frequency magnetic field test Power frequency magnetic field test For CRT monitors the following also applies The jitter shall be measured using a measuring microscope as specified in 6 6 14 of ISO 9241 3 character height 0 3 x 2 5 33 3 The jitter in mm shall not exceed the value when the CRT monitor is immersed in a continuous magnetic field of 1 A m r m s at one of the power frequencies of 50 or 60 Hz Alternatively a field of 50 A m may be applied and a transparent graduated mask used to assess the jitter In that case the jitter shall not exceed 50 times the value in the above formula NOTE This test level is used to simplify the measurement of jitter Lesser vaiues of the test level may
34. nal 15 1885 Part 64 Sec 1 and 2 1987 Technically Electrotechnical Vocabulary Electrotechnical vocabulary Part 64 Equivalent Chapter 161 Electromagnetic Electromagnetic compatibility Section compatibility 1 General terms Section 2 Specific terms 61000 4 2 1995 Electro IS 14700 4 Sec 2 1999 Identical magnetic compatibility EMC Electromagnetic compatibility EMC Part 4 Testing and measurement Part 4 Testing and measurement techniques Section 2 techniques Section 2 Electrostatic Electrostatic discharge immunity discharge immunity test test Basic EMC Publication 61000 4 4 1995 Electro IS 14700 4 Sec 4 1999 do magnetic compatibility EMC Electromagnetic Compatibility EMC Part 4 Testing and measurement Part 4 Testing and measurement techniques Section 4 Electrical techniques Section 4 Electrical fast fast transient burst immunity test _ transient burst immunity test Basic EMC Publication IEC 61000 4 8 1993 Electro IS 14700 Part 4 Sec 8 1999 do magnetic compatibility EMC Electromagnetic Compatibility EMC Part 4 Testing and measurement Part 4 Testing and measurement techniques Section 8 Power techniques Section 8 Power frequency frequency magnetic field immunity test CISPR 22 1997 Information IS 6873 Part 7 1999 Limits and do technology equipment Radio methods of measurements of radio disturbance characteristics disturbance charactersitcs Par
35. nd acoustic noise level of 40 dB spl and the test levels to be applied for functional testing The amplitude demodulated disturbances will arise almost invariably from semi conductor junctions behaving as inadvertent square law detectors This means that for every 1 dB change in the level of the applied radio frequency signal the demodulated level will change by 2 dB Therefore if a radiated immunity test subjecting the EUT to a test field carrier level of 3 V m produces a resultant demodulated acoustic 1 kHz disturbance output of 55 dB spl distinctly annoying acoustic level for most listeners with normal hearing but conveniently above the allowed background noise ievel of 40 dB spi the test ensures that an amplitude modulated disturbance field of 1 V m approximately 10 dB lower field strength applied to the same equipment ina real world situation can produce a demodulated acoustic disturbance leve of approximately 35 dB sp which most people in a practical listening environment not perceive as annoying Measurement method 2 The volume control where it exists shall be set at a fixed level during calibration and shall not be changed during the test The following shall be fulfilled during a sweep in the whole of the specified frequency range the TTE shall be able to maintain an established call for supporting telephony service the following also applies with the audio channel open and active the demodulated
36. r data with another TTE through the network NOTE The call shall be operated in the way specified by the manufacturer For circuit switched services the exchange of data shall be considered to be possible when a 64 kbit s channel or equivalent is available for both parties For packet service the exchange of information shall be considered to be possible when a virtual path is established to the called TTE 3 11 to establish a telephony call The operating procedure for a user or an automatic process in conjunction with the network to reach the capability to exchange information with another TTE See note to 3 10 3 12 to receive a telephony call The operating procedure for a user or an automatic process initiated by and in conjunction with the network to reach the capability to exchange information with another TTE See note to 3 10 3 13 to maintain a telephony call The capability of exchanging information without having to clear and re establish a call See note to 3 10 5 IS 15039 2001 CISPR 24 1997 3 14 to clear a telephony call The operating procedure for a user or an automatic process in conjunction with the network either at the initiative of the local party or the distant party to stop the capability of exchanging information by an orderly return to a state where the establishment of a new call is possible See note to 3 10 3 15 network terminator NT Ancillary equipment representing the termination of the tele
37. s No standard image is required but the use of a pattern consisting of a grid of lines and a scale of grey tones is recommended Testing shall be performed in the stand by mode and the copying mode E 2 Particular performance criteria Performance criterion A The EUT shall operate without degradation of performance during and after the application of the disturbance For example there shall be no unintended start of operation change of the program or of the program setting for example e single or double sided e number of copies sorting and or stapling contrast copy size reduction or enlargement loss of stored or transmitted data interruption of copying sequence for example paper jam false indications for example paper jam low toner low paper control indicators fall back to stand by mode from copying mode unintended operation of safety interlocks degradation of copied images beyond manufacturer s specification errors in billing devices Performance criterion B As for performance criterion A with the following exception False indications of for example paper jam low toner low paper control indicators are permissible during the test All false indications must be removed when the copier is reset to the stand by mode after the completion of the test Performance criterion Degradation of performance as specified under criteria A is allowed with the fo
38. sed G 2 Particular performance criteria Performance criterion A The EUT shall operate without degradation of performance curing and after the application of the disturbance For example there shall be no system response time beyond the figure defined by the manufacturer memory errors data corruption repeated self recoverable errors beyond a number specified by the manufacturer 30 IS 15039 2001 CISPR 24 1997 loss of stored data keyboard lock up system reset or shut down system change state network connections dropping money or receipts inappropriately dispensed errors VO state change Performance criterion B As for performance criterion A with the following exception keyboard lock up or corruption of information of a single item within a transaction is permitted during the application of the disturbance provided that the event is recorded and the user alerted Performance criterion There shall be no loss of function following the restoration of the system by the operator Loss or corruption of volatile or non volatile memory is not permitted Degradation of the performance as described in criteria A and B is permitted provided that the normal operation of the EUT is self recoverable or can be restored after the test by the operator 31 Continued from second cover The concerned Technical Committee responsible for the preparation of this
39. sitive devices such as CRT monitors if they are the only sensitive parts In this case and if the CRT monitor is integral with the ITE then the CRT monitor or sensitive device can be removed for testing 4 2 5 Surges The test procedure shall in accordance with 61000 4 5 or if appropriate ITU T K20 K21 or K22 8 5 15039 2001 CISPR 24 1997 4 2 6 Voltage dips and interruptions The test procedure is in accordance with IEC 61000 4 11 There shali be no deviations from that standard 5 Applicability Tests shall be applied to the relevant ports of the equipment according to tables 1 to 4 Tests shall only be carried out where the relevant port exists may be determined from consideration of the electrical characteristics and usage of a particular equipment that some of the tests are inappropriate and therefore unnecessary In such a case it is required that both the decision and the justification not to apply any particular test to any particular port be recorded in the test report 6 Conditions during testing 6 1 General conditions The tests shall be made exercising all primary functions in the most representative mode consistent with typica applications The test sample shall be configured in a manner consistent with typical installation practice lf the equipment is part of a system or can be connected to auxiliary equipment then the equipment shall be tested while connected to the minimum representati
40. standard has reviewed the provisions of the following International Publication and has decided that they are acceptable for use in conjunction with this standard IEC 60318 1970 An IEC artificial ear of the wideband type for the calibration of used in audiometry _ IEC 61000 4 3 1995 Electromagnetic compatibility EMC Part 4 Testing and measurement techniques Section 3 Radiated radio frequency electromagnetic field immunity test IEC 61000 4 5 1995 Electromagnetic compatibility EMC Part 4 Testing and measurement techniques Section 5 Surge immunity test IEC 61000 4 6 1996 Electromagnetic compatibility EMC Part 4 Testing and measurement techniques Section 6 Immunity to conducted disturbances induced by radio frequency fields IEC 61000 4 11 1994 Electromagnetic compatibility EMC Part 4 Testing and measurement techniques Section 11 Voltage dips short interruptions and voltage variations immunity tests ISO 9241 3 1992 Ergonomic requirements for office work with visual display terminals VDTs Part 3 Visual display requirements ITU T Recommendation 1 241 1 Telephony ITU T Recommendation 1 411 Integrated service digital network ISDN user network interfaces ITU T Recommendation K 15 Protection of high capacity transmission systems against overvoltages and HF disturbances ITU T Recommendation K 17 Tests on power fed repeaters using solid state devices in order to check the arrangements for protec
41. stigation should be restricted to those areas normally handled by the user A minimum of 10 single air discharges shall be applied to the selected test point for each such area The application of electrostatic discharges to the contacts of open connectors is not required by this publication 4 2 2 Electrical fast transients EFT The test method is given in IEC 61000 4 4 However the test set up for in situ measurements is not applicable for ITE The test procedure is as given in IEC 61000 4 4 together with the following changes and clarifications if the equipment contains identical ports only one shall be tested multiconductor cables such as a 50 telecommunication cable shall be tested as single cable Cables shall not be split or divided into groups of conductors for this test interface ports which are intended by the manufacturer to be connected to data cables not longer than 3 m shall not be tested 4 2 3 Continuous radio frequency disturbances The preferred frequency range for the radiated field test is 80 MHz to 1 000 MHz The preferred frequency range for the continuous conducted test is 0 15 MHz to 80 MHz However the radiated test may be performed with a start frequency lower than 80 MHz in that case the continuous conducted test where applicable need only be carried out up to this start frequency The frequency ranges are scanned as specified however at a limited number of selected freq
42. t 7 Limits and methods of information technology equipment measurements first revision Continued on third cover CONTENTS Page 1 Sepe and ODOC A E A sumed 3 2 3 3 Delni 4 mamiy TEST regure ments 6 5 Applicability E cde Sad eases 9 6 Conditions CSUN Greets essence ana 9 7 10 11 Tables tread awe eee eee 11 Immunity signal ports and telecommunication 12 3 Immunity input power port excluding equipment marketed WiIthan G 6 6 C DOWEF CONVEMEN 12 4 immunity input power port including equipment marketed with a separate power converter 13 Annexes A Telecommunications terminal eguipment sssssssssssrereesrerssrrrrrrereeraresserersaneeriseeeees 14 B Data processing 21
43. tion from external interferences ITU T Recommendation K 20 Resistibility of telecommunication switching equipment to overvoltages and overcurrents ITU T Recommendation K 21 Resistibility of subscribers terminals to overvoltages and overcurrents ITU T Recommendation K 22 Overvoltage resistibility of a lla connected to an ISDN T S bus Blue Book Volume IX November 1988 Only the English language text of the International Standard has been retained while adopting it in this Indian Standard Bureau of Indian Standards BIS is a statutory institution established under the Bureau of Indian Standards Act 1986 to promote harmonious development of the activities of stardardization marking and quality certification of goods and attending to connected matters in the country Copyright BIS has the copyright of all its publications No part of these publications may be reproduced in any form without the prior permission in writing of BIS This does not preclude the free use in the course of implementing the standard of necessary details such as symbols and sizes type or grade designations Enquiries relating to copyright be addressed to the Director Publication BIS Review of Indian Standards Amendments are issued to standards as the need arises on the basis of comments Standards are also reviewed periodically a standard along with amendments is reaffirmed when such review indicates that no changes are needed if the review in
44. tion shall be carried out using one of the following techniques the EUT can be repositioned so that the front surface remains separated from the radiating antenna by the test distance perpendicular with the axis between the calibration point and the radiating antenna in order to illuminate those sections of the EUT outside the previous antenna beam width where the EUT consists of separate modules the modules can be tested separately within the antenna beam width In cases of dispute full illumination of the EUT will take precedence The frequency range can be swept incrementally with a step size not exceeding 4 of the fundamental with a test level of twice the value of the specified test level In cases of dispute testing with 1 steps will take precedence 4 2 3 2 Continuous conducted disturbances There shall be no additional deviations from IEC 61000 4 6 other than those specified in 4 2 3 1 4 2 4 Power frequency magnetic fields The test procedure shall be in accordance with 61000 4 8 The EUT shall be arranged and connected to satisfy its functional requirements and shall be placed at the centre of the coil system immersion method The cables supplied by the equipment manufacturer shail be used or in their absence suitable alternative cables of the type appropriate to the signals involved shall be used Physically large products need not be completely submerged in the magnetic field only the sen
45. ts in normal operation B 5 2 Particular performance criteria Performance criterion A Failures which do not influence the specified operation within the product specification and which do not prevent automatic recovery are permissible Performance criterion B Failures which are recovered automatically but cause temporary delay in processing are permissible Performance criterion C Failures resulting in a delay in processing after the external disturbance is removed but which can be recovered to normal operation by reset or reboot are permissible Failures resulting in a system abort which can be recovered to normal operation by reset or reboot are permissible Failures which are followed by alarms and can be recovered to normal operation by the operator s intervention are permissible 24 IS 15039 2001 CISPR 24 1997 Annex C normative Local area networks LAN C 1 Particular test conditions A minimum test configuration consists of two pieces of terminal equipment interconnected with manufacturer specified physical cable Associated equipment necessary to the function of the LAN shall be included in the test configuration Unused ports shall be treated according to the manufacturer s instructions The system shall be capable of delivering and receiving data at the specified nominal transmission rate The LAN equipment executes a programme which exercises the LAN functions As a minimum the functions below
46. turer when the equipment is used as intended The performance level may be replaced by a permissible loss of performance If the minimum performance level or the permissible performance loss is not specified by the manufacturer then either of these may be derived from the product description and documentation and by what the user may reasonably expect from the equipment if used as intended Performance criterion B After the test the equipment shall continue to operate as intended without operator intervention No degradation of performance or loss of function is allowed after the application of the phenomena below a performance level specified by the manufacturer when the equipment is used as intended The level mays be replaced by a PeEmiseivle loss of performance During the test degradation of performance is allowed However no change of operating state or stored data is allowed to after the test If the minimum level a the permissible performance loss is not specified by the manufacturer then either of these may be derived from the product description and documentation and by what the user may reasonably expect from the if used as intended 10 IS 15039 2001 CISPR 24 1997 Performance criterion C Loss of function is allowed provided the function is self recoverable or can be restored by the operation of the controls by the user in accordance with the manufacturer 5 instructions
47. uencies a more comprehensive functional test may be required The requirement to undertake this additional selected frequency test is not universally applicable to all products but only to products which have this requirement specified in annex A under particular product specific requirements The selected frequencies are given in tables 1 to 4 The dwell time at each frequency shall not be less than the time necessary for the EUT to be exercised and to be able to respond however the dwell time shall not exceed 5 s at each of the frequencies during the scan The time to exercise the EUT shal not be interpreted as a total time of a programme a cycle but related to the reaction time in case of failure of the EUT IS 15039 2001 CISPR 24 1997 4 2 3 1 Continuous radiated disturbances The test procedure is in accordance with 61000 4 3 The EUT shall be positioned so that the four sides of the EUT shall be exposed to the electromagnetic field in sequence In each position the performance of the EUT will be investigated the case where the most sensitive surface side of the EUT is known throughout the frequency range for example via preliminary tests testing may be restricted to that surface side only In cases of dispute testing on the four surface sides shall take precedence If the EUT is too large to be adequately illuminated by the radiating antenna partial illumination shall be used Partial illumina
48. ve configuration of auxiliary equipment necessary to exercise the ports in a similar manner to that described in CISPR 22 The configuration and mode of operating during the tests shall be precisely noted in the test report It is not always possible to test every function of the in such cases the most critical mode of operation shall be selected If the equipment either has a large number of terminals a large number of ports with similar connections then a sufficient number shall be selected to simulate the actual operating conditions and to ensure that all the different types of termination are covered Coil cables such as keyboard cables shall not be intentionally stretched during testing For such cables the length specified in the table notes refers to unstretched conditions The test equipment or auxiliary equipment for example NT or simulator connected to the EUT shall not have any influence on the result of the testing In cases where a manufacturers specification requires external protection devices or measures which are clearly specified in the user s manual then the test requirements of this standard shall be applied with the external protection devices or measures in place During testing the environmental conditions and supply voltages shail remain within the operating ranges specified for the product unless otherwise indicated in the basic standard If an earth connection independent of the power supply ca
49. which are expected to be touched during usual operation including user access as specified in the user manual for example for ribbon and paper roll changes The discharges shail be applied in two ways a contact discharges to the conductive surfaces and to coupling planes The EUT shall be exposed to at least 200 discharges 100 each at negative and positive polarity at a minimum of four test points a minimum of 50 discharges at each point One of the test points shall be subjected to at least 50 indirect discharges corttact to the centre of the front edge of the horizontal coupling plane The remaining three test points shall each IS 15039 2001 CISPR 24 1997 receive at least 50 direct contact discharges f no direct contact test points are available then at least 200 indirect discharges shali be applied in the indirect mode see IEC 61000 4 2 for use of the Vertical Conducting Plane VCP Tests shall be performed at a maximum repetition rate of one discharge per second b air discharge at slots and apertures and insulating surfaces On those parts of the EUT where it is not possible to perform contact discharge testing the equipment should be investigated to identify user accessible points where breakdown may occur examples are openings at edges of keys or in the covers of keyboards and telephone handsets Such points are tested using the air discharge method See also 61000 4 2 regarding painted surfaces This inve
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