1、 m 3234b00 Ob443b 554 II c TIA/EIA STANDARD ANSI/TIA/EIA-455-32A-1990 Approved: February 21, 1990 Reaffirmed: July 10, 1995 Reaffirmed: October 27, 1999 FOTP-32 Fiber Optic Circuit Discontinuities (Revision of EIA-455-32) APRIL 1990 TELECOMMUNICATIONS INDUSTRY ASSOCIATION Electronic Industrim Allian
2、ce Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-.II 3234bOO Ob44370 27b m NOTICE J TIA/EIA Engineering Standards and Publications are designed to serve the public interest th
3、rough eliminating misunderstandings between manufacturers and purchasers, facilitating interchangeability and improvement of products, and assisting the purchaser in selecting and obtaining with minimum delay the proper product for his particular need. Existence of such Standards and Publications sh
4、all not in any respect preclude any member or nonmember of TWIA from manufacturing or selling products not conforming to such Standards and Publications, nor shall the existence of such Standards and Publications preclude their voluntary use by those other than TIA/EN members, whether the standard i
5、s to be used either domestically or internationally. Standards and Publications are adopted by TMIA in accordance with the American National Standards Institute (ANSI) patent policy. By such action, TIA/EIA does not assume any liability to any patent owner, nor does it assume any obligation whatever
6、 to parties adopting the Standard or Publication. This Standard does not purport to address all safety problems associated with its use or all applicable regulatory requirements. It is the responsibility of the user of this Standard to establish appropriate safety and health practices and to determi
7、ne the applicability of regulatory limitations before its use. (From Standards Proposal No. 3805, formulated under the cognizance of the TIA FO-6.3 Subcommittee on Fiber Optic Interconnecting Devices.) This Document was reaffirmed by the American National Standards Institute (ANSI) on July 10,1995 a
8、nd on October 27,1999, and by the TIA. Published by ELECTRONIC INDUSTRIES ALLIANCE Engineering Department 2500 Wilson Boulevard Arlington, VA 22201 TELECOMMUNICATIONS INDUSTRY ASSOCIATION 1990 PRICE: Please refer to current Catalog of PUBLICATIONS or call Global Engineering Documents, USA and Canada
9、 (1-800-854-7179) International (303-397-7956) EIA ELECTRONIC INDUSTRIES ALLIANCE STANDARDS and ENGINEERING All rights reserved Printed in U.S.A. Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without lice
10、nse from IHS-,-,-1111 3234bD0 b44372 049 TABLE OF CONTENTS 1 1.0 INTENT 1 2.0 REFERENCED DOCUMENTS 3.0 TEST EQUIPMENT 1-3 3.1 Optical Source . 1-2 3.2 Transient Detection Equipment 2-3 3 3.3 Transient Calibrator . 4.0 EQUIPMENT CALIBRATION . 3-4 4.1 Transient Calibrator . 3-4 4 4.2 Calibracion Requi
11、rements . 4 5.0 TEST SAMPLE . 6.0 TEST PROCEDURE 4-6 5 7.0 DOCUMENTATION . 6-7 7 8.0 SPECIFYING INFORMATION Table 1 - Discontinuity Conditions a FIGURE 1 - Typical Equipment Configuration . 8 FIGURE 2 - Calibrator Output Signal Tolerance Bands APPENDIX - The Relationship Between Discontinuity Time a
12、nd . Acceleration 9-12 9 11 Figure Al - Relative Axial Misalignment of Two Fibers . Figure A2 - Relationship Between t And T Figure A3 - Relationship Of Discontinuity Time to Applied g Level . 12 Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo
13、 reproduction or networking permitted without license from IHS-,-,-TIA/EIA-455-326 Page 1 FOTP-32 FIBER OPTIC CIRCUIT DISCONTINUITIES (From EIA StaGdards Proposal No.1893, formulated under the cognizance of TIA FO-6.3, Subcommittee on Fiber Optic Interconnecting Devices, and TIA FO-6.4, Subcommittee
14、 on Fiber Optic Test Methods and Instrumentation. This FOTP is part of the series of test procedures included within Recommended Standard EIA/TIA-455. NOTE: This FOTP was originally published in EIA RS-455-32 as FOTP-32. 1.0 INTENT The intent of this procedure is to provide a method of testing a bro
15、ad variety of passive or active fiber optic components or subsystems for susceptibility to discontinuities (transient output or transmittance fluctuations) during the application of an external stimulus, such as vibration or physical shock. 2.0 REFERENCED DOCUMENTS This test method is intended to be
16、 used in conjunction with one or more of the following test methods, referred to as Primary FOTPs. FOTP-11 (E IA-4 55 -I IA) “Vibration Test Procedure for Fiber Optic Connecting Devices and Cables“ FOTP- 14 (E IA-4 5 5-14 ) “Fiber Optic Shock Test (Specified Pulse) It 3.0 TEST EQUIPMENT (REFER TO FI
17、GURE 1) 3.1 OPTICAL SOURCE 3.1.1 An optical source is required for tests on all components other than emitting devices. Unless otherwise specified in the Detail Specification, the optical source shall have a nominal wavelength of 850 2 30 nm for components employing multimode optical Copyright Telec
18、ommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I 3234600 Ob44374 911 TI AI E IA-45 5 -3 2A Page 2 . fiber, or 1300 f 30 nm for components employing single-mode optical fiber. The source shall
19、 have sufficient amplitude stability for the duration of the primary test to permit adequate determination of discontinuities without false activation of the amplitude threshold limits. The optical source shall substantially overfill the optical fiber used in the test. Multiple sources may be requir
20、ed if several samples are to be monitored simultaneously. 3.1.2 Active devices which can be electrically operated and/or detected so as to produce a constant output amplitude can be tested with this procedure by substituting such device for the optical source or receiver. For an emitter: (a) the wav
21、elength of the test shall be that of the device, and (b) the fiber type and/or coupling method employed shall be reported. For a detector or receiver: the wavelength of the test shall be as specified in 3.1.1 (as appropriate for the detector) and shall be reported. 3.2 TRANSIENT DETECTION EQUIPMENT
22、3.2.1 OPTICAL RECEIVER 3.2.1.1 Means shall be provided to detect the optical power emanating from, or being transmitted through, the device under test, and to linearly convert this power to an electrical signal. The range of optical power over which the optical receiver output is linear shall be def
23、ined by the equipment manufacturer or the user for calibration purposes (see 4.2). It may be necessary to include an electrical or optical attenuator to compensate for variations in received optical power levels. 3.2.1.2 A detector or receiver may be used as the test sample if it meets the requireme
24、nts of 3.2.1.1, and if its output can be appropriately monitored by the transient detection circuitry. The rise and fall times of the detector or optical receiver shall be sufficiently short to register a discontinuity on the transient detector when the specified discontinuity is applied to the opti
25、cal source. Details of the electrical operation of the test sample and interface to the transient detector shall be recorded in the test documentation (see 7.2.5). Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking perm
26、itted without license from IHS-,-,-3.2.2 TRANSIENT DETECTOR 3.2.2.1 Means shall be provided to detect rapid signal fluctuations simultaneously exceeding both amplitude and duration values as given for the particular test coidition that applies. The Detail Specification shall limit the discontinuity
27、conditions by specifying a particular test condition through reference to an appropriate Test Condition Letter selected from Table 1. Several channels may be used to monitor multiple test samples. NOTE: Circuitry designed for this purpose is frequently sensitive to EM1 (Electro-Magnetic Interference
28、) and RFI (Radio Frequency Interference) and should be designed and constructed so as to minimize interference from external events. 3.2.2.2 Means shall be provided to indicate the incidence of any discontinuity which occurs during application of the primary FOTP specified by the Detail Specificatio
29、n (see 6.4) . Unless otherwise specified in the Detail Specification, only the occurrence of a discontinuity shall be recorded. Additional equipment may be used to record the number of discontinuities occurring during a test. 3.3 TRANSIENT CALIBRATOR Means shall be provided to create the specified d
30、iscontinuity condition, either in the optical source used for the test, or in a separate apparatus. Transient calibrators, selectable for duration and amplitude, may be used as necessary. Both positive and negative transients shall be provided. 4.0 EQUIPMENT CALIBRATION 4.1 TRANSIENT CALIBRATOR 4.1.
31、1 The optical output from the transient from the optical source, when the applied) shall be contained within the template shown in Figure 2. Note that been normalized to the specified - amplitude and duration. Both positiv calibrator calibrator outlines of the figure discontinu e and negat (or is th
32、e has ity .ive Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-111 3234b00 Ob44376 794 111 TIA/EIA-455-32A Page 4 excursions are shown; the same tolerances apply to each. 4.1.2
33、If the test sample is an optical emitter, means shall be provided to verify that the optical signal level incident upon the optical receiver during test is within the defined receiver power range, and is the same as that used for calibration. 4.2 CALIBRFLTION REQUIREMENTS Unless otherwise specified
34、in the Detail Specification, calibration of the transient detection equipment (optical receiver and transient detector) shall consist of documentation verifying detection of a discontinuity at each of the measurement systems amplitude and duration settings required for a test, at the maximum, median
35、, and minimum specified receiver optical power levels when the specified optical discontinuity is output from the transient calibracor (see 3.3 and 4.1). (as defined in 3.2.1.11, 4.2.1 When calibration as described in 4.2 is performed at regular intervals, it is not required for each test. 4.2.2 Alt
36、ernatively, calibration may be performed at the time of test at the optical power level actually employed for the test. The calibration test results shall then be included with the test documentation. 5.0 TEST SAMPLE The test sample may be any configuration of active or passive devices and/or optica
37、l fiber cable, as specified by the Detail Specification or the Primary FOTP. 6.0 TEST PROCEDURE 6.1 Using the equipment specified by the Primary FOTP, arrange the test sample(s) in accordance with the requirements of that Primary FOTP. Attach optical fiber cable(s) of length and fiber type/size as m
38、ay be required by the Primary FOTP (or the test sample) to the optical source and optical receiver. If the test sample is an emitter or detector, use connections appropriate for the device being tested. Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for R
39、esaleNo reproduction or networking permitted without license from IHS-,-,-. M 3234bOO Ob44377 620 = TIA/EIA-455-32A Page 5 6.2 Set the transient detection equipment for the particular conditions required by the Detail Specification. (The Detail Specification will specify one or more test conditions
40、selected from Table 1, following. See 8.3.) 11 DISCONTINUITY CONDITIONS AMPLITUI)E fly DURATIC)N. J& MCST C9)NDITIr)N 1 A f0.5 dB 11dB 13dB 10.5 dB I1dB +3dB 1 1 10 10 10 G Per Detail Spec. Per Detail Spec. (See Appendix) (See Appendix) 5.3 6.4 6.5 Make operational adjvstments to the detection equip
41、ment as may be necessary to accommodate the detected optical power level. Clear the transient detector of any prior transients. For emitting devices, verify that the optical power from the device under test is within the specified range of detector operation (see 3.2.1). Enable the transient detecti
42、on system, and begin application of the physical stimulus specified by the primary FOTP. To the extent possible, exercise care to minimize or avoid electrical switching tzansients when initiating the stimulus. Test the sample(s) as required by the Primary FOTP. At the conclusion of each phase of the
43、 Primary test (such as one plane of vibration) or prior to any physical rearrangement of the test sample(s) or optical leads, determine and note the results, as defined by the Detail Specification, for that phase. Copyright Telecommunications Industry Association Provided by IHS under license with E
44、IANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-m 323VbOO Ob44378 5b7 D TIA/EIA-455-3% Page 6 . 6.6 Repeat steps 6.3 through 6.5 as necessary to complete the Primary test. 6.7 Summarize and report, as a single result, all results for all phases of the Primary tes
45、t. Unless otherwise speccfied in the Detail Specification, a single discontinuity shall constitute failure for the entire test. 7.0 DOCUMENTATION 7.1 Unless otherwise specified in the Detail Specification, the following data shall be reported: 7.1.1 Date and Title of the Test. 7.1.2 Test Procedure N
46、umber (FOTP-32) and Test Condition Letter (Table 11, when applicable. 7.1.3 Number, description, and identification of the. test sample (SI monitored for discontinuity. 7.1.4 Number of the Primary FOTP used for the test. 2.0, 6.1, and 6.5) (See 7.1.5 Wavelength of the optical source, if other than s
47、pecified in 3.1.1. 7.1.6 Any additional documentation required by the Primary FOTP used- 7.1.7 Results of the test. (See 6.7.) 7.2 For U. S. Military applications, brief descriptions of the following items shall be reported for each test. For all other applications, the descriptions need not be repo
48、rted, but shall be available upon request. 7.2.1 Test Personnel. 7.2.2 Test equipment used (description of the optical source, optical receiver, and transient detector). Date of latest equipment calibration. 7.2.3 Copyright Telecommunications Industry Association Provided by IHS under license with E
49、IANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-323I.1600 0644379 4T3 I TIA/EIA-455-3a Page 7 7.2.4 Method of calibration implementation. (See 4.2.) 7.2.5 Electrical interface details, if applicable. 3.2.1.2.) (See 7.2.6 DeseriPtion of adjustments required by the transient detection equipment. 8.0 SPECIFYING INFORMATION The following information shall be specified
