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1、? JIS JAPANESE IN DUSTRIAL STANDARD Translated and Published by Japanese Standards Association JIS C 6111 :1997 Measuring methods of transmitting and receiving modules for low speed fiber optic transmission ? ICs 33.180.20 Descriptors : data transmission, fibre optic cables, telecommunication links,
2、 trans- mitters, receivers, modules, testing, optical communication systems, circuits Reference number : JIS C 6111 : 1997 (E) 12 s Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 22:26:21
3、MDTNo reproduction or networking permitted without license from IHS -,-,- STDDJIS C bLLL-ENGL 1997 = ir933b08 0552335 Yb0 W C 6111 :1997 Foreword This translation has been made based on the original Japanese Industrial Standard revised by the Minister of International Trade and Industry through deli
4、berations at Japanese Industrial Standards Committee in accordance with the Industrial Standardization Law. Consequently JIS C 6111:1990 is replaced with JIS C 6111:1997. Attention is drawn to the possibility that some parts of this Standard may conflict with a patent right, application for a patent
5、 after opening to the public, utility model right or application for registration of utility model after opening to the public which have technical properties. The relevant Minister and the Japanese Industrial Standards Committee are not responsible for identifying the patent right, application for
6、a patent after opening to the public, utility model right or application for registration of utility model after opening to the public which have the said technical properties. Date of Establishment: 1990-11-01 Date of Revision: 1997-11-20 Date of Public Notice in Official Gazette: 1997-11-20 Invest
7、igated by: Japanese Industrial Standards Committee Divisional Council on Electronics JIS C 6111:1997, First English edition published in 1998-11 Translated and published by: Japanese Standards Association 4-1-24, Akasaka, Minato-ku, Tokyo, 107-8440 JAPAN In the event of any doubts arising as to the
8、contents, the original JIS is to be the final authority. Q JSA 1998 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing fr
9、om the publisher. Printed in Japan Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 22:26:21 MDTNo reproduction or networking permitted without license from IHS -,-,- I JAPANESE INDUSTRIAL S
10、TANDARD JIS C 6111 : 1997 Measuring methods of transmitting and receiving modules for low speed fiber optic transmission Introduction This Standard specifies measuring methods of transmitting and receiving modules for low speed fiber optic transmission with 2 R (waveform reproducing and reshap- ing)
11、 functions which are used for transmission of NRZ digital signal at a bit rate not exceeding 10 Mb/s through a multimode optical fiber, in response to the requirement of early establishment of national Standard in such backgrounds that the market of fiber optic transmission link inside and outside o
12、f this country is spreading and the international standardizing activity is promoted. 1 Scope This Japanese Industrial Standard specifies measuring methods of transmitting and receiving modules for low speed fiber optic transmission with waveform reproducing and reshaping functions which are used fo
13、r transmission of NRZ digital signal at a transmission rate not exceeding 10 Mb/s through a multimode optical fiber. Remarks : The transmitting and receiving module for low speed fiber optic transmission delt with here means a module composed of a transmitter consisting of a light emitting diode as
14、the light emitting element, an electric circuit and a joint with the optical fiber, and a receiver consisting of a light receiving element, and electronic circuit and a joint with the optical fiber. It is the generic name of modules of the following three kinds in construction : a) Transmitting modu
15、le in which the above transmitter is employed as an individual module. b) Receiving module in which the above receiver is employed as an indi- vidual module. Transmitting and receiving module in which the above transmitter and receiver are employed to form a module. c) 2 Normative references The fol
16、lowing standards contain provisions which, through reference in this Standard, constitute provisions of this Standard. The most recent editions of the standards indicated below shall be applied. JIS C 1102 Electrical indicating instruments JIS C 6110 General rules of transmitting and receiving modul
17、es for low speed fiber optic transmission 3 C 6110, the following principal definitions apply : Definitions For the purpose of this Standard, in addition to the definitions stated in JIS a) measurement optical fiber Such an optical fiber that its structural parameters and the structural parameters o
18、f the plug attached to it have respective values which satisfy the requirements of measurements. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 22:26:21 MDTNo reproduction or networking pe
19、rmitted without license from IHS -,-,- STD-JIS C bLLL-ENGL 1997 493lb08 0552337 333 2 C 6111 : 1997 b) reference transmitter and reference receiver Such transmitter and receiver that their electrical and optical characteristics have respective values which satisfy the require- ments of measurements
20、of each item in the relevant Standard. 4 Atmospheric conditions for measurement 4.1 Standard conditions Unless otherwise specified, the measurements shall be carried out under the conditions of a temperature 15 O C to 35 O C , a relative humidity 25 % to 85 %, and an air pressure 860 hPa to 1 060 hP
21、a. If any doubt arises on the decision of measured value under this standard conditions or if especially required, the conditions of 4.3 shall be employed. If conversion to the reference conditions is necessary, the conditions of 4.2 shall be employed. If it is difficult to carry out the tests under
22、 the standard conditions, the test may be carried out under the conditions other than the standard conditions, unless any doubt arises on the decision. 4.2 Reference conditions The reference conditions shall be those of temperature 25 O C , relative humidity 45 %, and an air pressure 860 hPa to 1 06
23、0 hPa. However, only the temperature may be employed as the reference condition. 4.3 Referee conditions The referee conditions shall be temperature (25f 2) O C , a relative humidity 45 % to 55 % and an air pressure 860 hPa to 1 060 hPa. 5 Measuring apparatus and equipment 5.1 In the d.c. power suppl
24、y, the voltage fluctuation shall not exceed k 5 % or 10 mV whichever is the larger, and in the a.c. power supply, the higher harmonic content shall not exceed 5 %. If commercial power supply is used, the higher harmonic content shall not exceed 10 %. Further, in the test of measuring a.c. output, th
25、e ripple content of d.c. power supply, higher harmonic content of a.c. power supply and a.c. impedance of the d.c. supply circuits through which a.c. current flows shall have small values so that they will not affect the measurement. Measuring power supply The power supply shall be enough protected
26、against ingress of surges. 5.2 Instruments and measuring apparatus Unless otherwise specified, the instruments shall be those of class index 0.5 or better specified in JIS C 1102, and the measuring apparatus shall have an accuracy at least equivalent thereto, and their impedances shall be of such va
27、lues that the influence on the measuring system can be ignored. Remarks: If there is no instrument of class index 0.5 or better or measuring apparatus of equivalent accuracy, as standard products, the provision of 5.2 does not apply * 5.3 Optical power meter The optical power meter to be used for me
28、asurements shall be calibrated at the appropriate wavelength and the sensitivity distribution of light receiving plane shall be sufficiently flat. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15
29、/2007 22:26:21 MDTNo reproduction or networking permitted without license from IHS -,-,- , STDOJIS C bL11-ENGL 1777 D 4733b08 0552118 07T I I 3 C 6111 : 1997 6 Measuring method of electrical and optical characteristics 6.1 individual test) Transmission delay time (composite test, transmitter individ
30、ual test and receiver 6.1.1 specified conditions. Purpose The purpose is to measure the transmission delay time of modules under 6.1.2 out as illustrated in Fig. 1. Measuring circuit The measurement of transmission delay time shall be carried D.C. Power supply %pti- r-U Ica1 1 I power meter I I 1 !
31、D.C. Power I I supply P Variable i optical I attenuator I Measurement - optical fiber under test () v form ob- electric signal Pattern gener- Notes () () In the case of transmitter individual test, reference receiver is used. In the case of receiver individual test, the reference transmitter is used
32、. Remarks 1 The dash line shows the connection state in procedure 6.1.3 c). The optical delay of measurement opti- cal fiber, variable optical attenuator, etc. and the delay in signal line of measuring circuit shall be previously calibrated. 2 Fig. 1 Measuring circuit of transmission delay time Copy
33、right Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 22:26:21 MDTNo reproduction or networking permitted without license from IHS -,-,- STD-JIS C bL33-ENGL 3777 D 4733b08 0552339 Tob 4 C6111 : 1997
34、6.1.3 Measuring procedures a) Drive the transmitter and receiver under the specified conditions. b) Apply the specified continuous input electric signal of NRZ 1010- (mark density 50 %) input the transmitter from the pattern generator. c) Input the optical output signal so prepared to the receiver t
35、hrough measurement optical fiber and variable optical attenuator. Adjust the variable optical attenuator so that the specified optical power is inputted into receiver. d) Observe the waveforms of the output from the pattern generator and of the output from the receiver by means of such a waveform ob
36、serving device as an oscilloscope, and measure the time differences I P L H , tPHL between the said two waveforms at their 50 % amplitude value shown in Fig. 2. The optical delay in the measurement optical fiber, variable optical attenuator etc. and the delay in the signal line of the measuring syst
37、em shall be previously calibrated. If there is a pulse width jitter in the output electric signal, carry out the measurement at the maximum value of the jitter. logic “1” _- Input electric signal 50 % value - Logic “O” t PLH logic “ 1 ” - - - - - - - - Output electric signal 50 % value - Logic O” Ou
38、tput electric signal 50 % value - Logic “O” AL Remarks: This figure shows the case of positive logic and in the case of negative logic, the “logic 1” in the figure should be read as “logic O” and “logic O” as “logic 1”. Fig. 2 Transmission delay time e) Calculate transmission delay time t d from for
39、mula (1), formula (2) or formula (3): For composite transmitter and receiver test . (1) (2) (3) td (IPLH, tPHL) For transmitter individual test td =max(tPLH, tPHJ - tdr For receiver individual test td=-(tPLH, lPHL) - tdS , Copyright Japanese Standards Association Provided by IHS under license with J
40、SALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 22:26:21 MDTNo reproduction or networking permitted without license from IHS -,-,- 5 C 6111 : 1997 where, max (a,b) : The larger value among the values a and b. The value when they are equal. tdr : transmission delay t
41、ime of reference receiver tds : transmission delay time of reference transmitter f) In the case of composite test and receiver individual test, adjust the variable optical attenuator so that the minimum received optical power and the maximum received optical power are attained at the receiver, repea
42、t the measurement of td over the above range and take the maximum measured value as transmission delay time. In the case of composite test where a transmitter and a receiver are combined, use the test specimens as the transmitter and receiver under test. In the case of transmitter individual test us
43、e the reference receiver in lieu of the specimen receiver and in the case of receiver individual use the reference transmitter in lieu of the specimen transmitter. 6.1.4 Items to be specified in detail specifications Operating temperature Transmission delay time, rise time, fall time, distortion of
44、pulse width random jitter, maximum received optical power and minimum received optical power of reference receiver (the random jitter shall be sufficiently smaller than that of the transmitter under test.) Transmission delay time, rise time, fall time, distortion of pulse width random jitter and out
45、put optical power of reference transmitter (pulse width jitter shall be sufficiently smaller than that of the receiver under test.) Conditions for driving transmitter and receiver (supply voltage) Input signal for transmitter (transmission bit rate, waveform) Measurement optical fiber Maximum receiv
46、ed optical power and minimum received optical power of receiver 6.2 Distortion of pulse width (composite test, transmitter individual test and receiver individual test) 6.2.1 specified conditions. Purpose The purpose is to measure the distortion of pulse width of modules under 6.2.2 Measuring circui
47、t The measurements of pulse width distortion shall be carried out as illustrated in Fig. 3. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 22:26:21 MDTNo reproduction or networking permitt
48、ed without license from IHS -,-,- STD*JIS C b33L-ENGL 1997 = 4933b08 0552321 bbll = Waveform 6 C6111 : 1997 Reference input electric signal Optical meter I I I I I D.C. power I Variable I optical supply D.C. power supply I optical fiber test () observing 1 device Output electric signal Pattern generator Remarks 1 2 The dash line shows the connection state in procedure 6.2.3 c). The optical delay of measurement optical fiber, variable optical attenuator, etc. and the delay in signal line of measuring circuit shall be previously calibrated. Fig. 3 Measuring ci