1、 EIA STANDARD TP-106 Standing Wave Ratio (SWR) Test Procedure for Electrical ConnectorsEIA-364-106 May 2000 EIA-364-106 ANSI/EIA-364-106-2000 (R2013) Approved: May 12, 2000 Reaffirmed: January 15, 2013 NOTICE EIA Engineering Standards and Publications are designed to serve the public interest throug
2、h 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 shall
3、not in any respect preclude any member or nonmember of ECIA 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 ECIA members, whether the standard is to b
4、e used either domestically or internationally. Standards and Publications are adopted by ECIA in accordance with the American National Standards Institute (ANSI) patent policy. By such action, ECIA does not assume any liability to any patent owner, nor does it assume any obligation whatever to parti
5、es adopting the Standard or Publication. This EIA Standard is considered to have International Standardization implication, but the International Electrotechnical Commission activity has not progressed to the point where a valid comparison between the EIA Standard and the IEC document can be made. T
6、his 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 determine the applicability of regulatory limitations befo
7、re its use. (Created under Standards Proposal No. 4417-A and reaffirmed under Standards Proposal No. 5253.06 formulated under the cognizance of the CE-2.0 Committee on EIA National Connector and Socket Standards). Published by Electronic Components Industry Association 2013 Engineering Department 22
8、14 Rock Hill Road, Suite 170 Herndon, VA 20170 PLEASE! DONT VIOLATE THE LAW! This document is copyrighted by the ECIA and may not be reproduced without permission. Organizations may obtain permission to reproduce a limited number of copies through entering into a license agreement. For information,
9、contact: IHS 15 Inverness Way East Englewood, CO 80112-5704 or call USA and Canada (1-877-413-5184), International (303-397-7956) i Clause 1 CONTENTS Introduction Page11.1 Scope 12 Test resources . 12.1 Equipment 13 Test specimen . 23.1 Description . 23.2 Preparation . 24 Test procedure 24.1 Basic m
10、easurement setup . 24.2 SWR measurement . 24.3 SWR test system check 34.4 Cable termination . 34.5 Cable simulator termination . 34.6 Standard precision adapter interface 35 Details to be specified 66 Test documentation 6Figure 1 Swept frequency SWR test . 4ii (This page left blank) EIA-364-106 Page
11、 1 TEST PROCEDURE No. 106 STANDING WAVE RATIO (SWR) TEST PROCEDURE FOR ELECTRICAL CONNECTORS (From EIA Standards Proposal No. 4417-A, formulated under the cognizance EIA CE-2.0 Committee on National Connector Standards.) 1 Introduction 1.1 Scope This standard establishes test methods to evaluate exi
12、sting standing wave ratio (SWR) of connectors, coaxial, radio frequency (RF). Measured SWR shall not exceed that specified over the frequency range specified. 2 Test resources 2.1 Equipment 2.1.1 Swept RF source. 2.1.2 Isolating devices, two. 2.1.3 RF sampling device with frequency-amplitude charact
13、eristics matched to the second radio frequency sampling device, see 2.1.4, to within 0.5 dB. 2.1.4 RF sampling device with precision hermaphroditic output connector. Residual SWR 1.006 + 0.003f (f in GHz). 2.1.5 Standard precision adapter, maximum SWR 2.1.6 Detectors, two 2.1.7 Amplifiers, two 2.1.8
14、 X-Y display 2.1.9 Cable simulator termination EIA-364-106 Page 2 2.1.10 Selected test cable 2.1.11 Precision hermaphroditic cable connector 2.1.12 Precision hermaphroditic termination 2.1.13 Standard precision adapters 2.1.14 Selected long cable whose attenuation is 26 dB minimum at lowest test fre
15、quency, or as specified. 3 Test specimen 3.1 Description Specimen shall consist of a connector with attached cable. 3.2 Preparation The wired specimen shall not be cleaned, unless otherwise specified in the referencing document. 4 Test procedure The SWR shall be measured in accordance with the follo
16、wing procedure. Diagrams for the swept frequency SWR system check out and measurement procedures are shown in figure 1. 4.1 Basic measurement setup In the basic measurement setup of figure 1, detector 1 provides a feedback signal to the swept RF source in order to normalize the output signal of dete
17、ctor 2. The frequency-amplitude characteristics of detectors 1 and 2 shall be matched within 0.5 dB. 4.2 SWR measurement 4.2.1 Slotted line technique Ten or more sweeps are made with the radio frequency probe repositioned in equal increments over at least a half wavelength at the lowest frequency of
18、 the band being swept. In this manner an X-Y display is generated whose upper and lower envelope limits represent maximum and minimum amplitudes of the standing wave for each frequency in the test band. EIA-364-106 Page 3 4.2.2 Frequency reflectometer / RF bridge technique A single sweep shall be ma
19、de using sufficient RF power to provide as X-Y display less than 80 percent and/or, if possible, greater than 20 percent of full scale. 4.2.3 Calibration Except for logarithmic plots, a base line containing frequency marker pips shall be generated by making a sweep with no radio frequency input. The
20、 resultant X-Y display shall be calibrated according to the characteristics of the measurement channel detector and amplifier, e.g. linear, square law, logarithmic, etc. 4.3 SWR test system check The SWR test system is checked out by successively terminating the radio frequency sampler with the elem
21、ents shown in steps 1 and 2 and sweeping the frequency over the specified test band. In step 1 the system SWR shall be 1.02 + 0.004f (f measured in GHz). In step 2 the system SWR shall be as specified. 4.4 Cable termination When the connector must be evaluated by terminating a cable, the system is c
22、hecked out with the radio frequency sampler terminated as in step 3 using the specified cable. The impedance variation (random and/or periodic) from the nominal characteristic impedance for the selected test cable shall be no more than 1.0 percent when tested by time domain reflectometry having a sy
23、stem rise time equal to or shorter than the period of one half cycle of the highest frequency of test. In step 3 the system SWR shall be as specified. 4.5 Cable simulator termination When the connector is terminated by a cable simulator, tests are performed with the radio frequency sample terminated
24、 as shown in step 7. The input part of the cable simulator must have the same interface configuration, dimensions, and dielectric as the recommended cable interface for the connector under test. The cable simulator shall meet the specified SWR when tested as shown in step 6. 4.6 Standard precision a
25、dapter interface The standard precision adapter interface shall conform to IEEE Standard 287. Standard precision adapters shall not exceed the specified SWR requirements. Standard test adapter designs shall be approved by the military qualifying agency. EIA-364-106 Page 4 Figure 1 - Swept frequency
26、SWR test EIA-364-106 Page 5 Figure 1 - Swept frequency SWR test (continued) EIA-364-106 Page 6 5 Details to be specified The following details shall be specified in the referencing document: 5.1 Attenuation, if other than 26 dB; see 2.1.14 5.2 Test band; see 4.3 5.3 System SWR; see 4.3 and 4.4 5.4 T
27、est cable; see 4.4 5.5 Cable simulator; see 4.5 5.6 Component SWR; see 4.4 5.7 Standard precision adapter; see 4.5 and 4.6 6 Documentation Documentation shall contain the details specified in clause 5, with any exceptions, and the following: 6.1 Title of test 6.2 Specimen description, including fixt
28、uring if applicable (photographs may be used) 6.3 Test equipment used, and date of last and next calibration 6.4 Test and procedure 6.5 Original charts 6.6 Values and observations 6.7 Name of operator and date of test ECIA Document Improvement Proposal If in the review or use of this document, a pot
29、ential change is made evident for safety, health or technical reasons, please fill in the appropriate information below and mail or FAX to: Electronic Components Industry Association EIA Standards & Technology Department 2214 Rock Hill Rd., Suite 170 Herndon, VA 20170 FAX: (571-323-0245) Document No
30、.: Document Title: Submitters Name: Telephone No.: FAX No.: e-mail: Address: Urgency of Change: Immediate: At next revision: Problem Area: a. Clause Number and /or Drawing: b. Recommended Changes: c. Reason/Rationale for Recommendation: Additional Remarks: Signature: Date: FOR ECIA USE ONLY Responsible Committee: Chairman: Date comments forwarded to Committee Chairman: Electronic Components Industry Association 2214 Rock Hill Road, Suite 170 * Herndon, VA 20170 * tel 571-323-0294 * fax 571-323-0245 www.eciaonline.org
