1、AECMA STANDARD NORME AECMA AECMA NORM prEN 2591-224 Edition P 1 April 2005 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES - STANDARDIZATION Gulledelle 94 - B-1200 Brussels - Tel. + 32 2 775 8110 - Fax. + 32 2 775 8111 - www.aecma-stan.orgICS: 49.060 Descriptors: ENGLISH VERSION Aerosp
2、ace series Elements of electrical and optical connection Test methods Part 224: RF leakage Srie arospatiale Organes de connexion lectrique et optique Mthodes dessais Partie 224 : Fuite HF Luft- und Raumfahrt Elektrische und optische Verbindungselemente Prfverfahren Teil 224: HF-Streuverlust This “Ae
3、rospace Series“ Prestandard has been drawn up under the responsibility of AECMA-STAN (The European Association of Aerospace Industries - Standardization). It is published for the needs of the European Aerospace Industry. It has been technically approved by the experts of the concerned Domain followi
4、ng member comments. Subsequent to the publication of this Prestandard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-identification of the standard. After examination and review by users and formal agreement of AEC
5、MA-STAN, it will be submitted as a draft European Standard (prEN) to CEN (European Committee for Standardization) for formal vote and transformation to full European Standard (EN). The CEN national members have then to implement the EN at national level by giving the EN the status of a national stan
6、dard and by withdrawing any national standards conflicting with the EN. Edition approved for publication 30 April 2005 Comments should be sent within six months after the date of publication to AECMA-STAN Electrical Domain Copyright 2005 by AECMA-STAN Page 2 prEN 2591-224:2005Foreword This standard
7、was reviewed by the Domain Technical Coordinator of AECMA-STANs Electrical Domain. After inquiries and votes carried out in accordance with the rules of AECMA-STAN defined in AECMA-STANs General Process Manual, this standard has received approval for Publication. Contents Page 1 Scope 3 2 Normative
8、references. 3 3 Preparation of specimens. 3 4 Apparatus 5 5 Method. 5 6 Results 5 Page 3 prEN 2591-224:20051 Scope This standard specifies a test method of measuring the total leakage of wired coaxial connectors. It shall be use together with EN 2591-100. 2 Normative references The following referen
9、ced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 2591-100, Aerospace series Elements of electrical and optical conne
10、ction Test methods Part 100: General 1). 3 Preparation of specimens The mating connector pair to be tested shall be assembled as shown on Figure 2 and tested as shown on Figure 1. Detail of Test assembly shall conform to Figure 3. Key 1 RF source 2 Tri-axial test assembly 3 Sensitive calibrated micr
11、owave receiver Figure 1 RF leakage set-up 1) Published as AECMA Prestandard at the date of publication of this standard. 1 2 3 Page 4 prEN 2591-224:2005Key 1 See Figure 3. 2 Self contained termination for inner conductor (VSWR 1,30) 3 High performance connector to RF detector 4 Travel of short must
12、exceed /2 5 High performance connector from RF source 6 Push rods or devices for adjusting position of short Figure 2 Key 1 Metal to metal contact 2 Brass tubing forming a continuous shielding (external conductor of tri-axial assembly) Figure 3 Mated connector pair 46 3 5 2 121 Page 5 prEN 2591-224:
13、20054 Apparatus Mounting of specimens The close fitting brass tubing shall be machined to thread into connector in lieu of compression nut or any device, which insure the coaxial braid connection. This test set-up between 500 MHz and 11 GHz shall have a dynamic range from 20 dB to 100 dB. Using an a
14、dditional RF source amplifier (e.g. 20 dB), increase total dynamic range. The shorting plunger is adjusted to produce a maximum reading in the detector with the triaxial assembly inserted. 5 Method The insertion loss caused by the insertion of the triaxial assembly adjusted as shown in a measure of
15、total leakage of the mated connector pair both at its interface as well as the clamping points to both cable. The short circuit position is adjusted to assure that an adequately low impedance appears behind the equivalent leakage generator. The characteristic impedance of the outer coaxial line of t
16、he triaxial system, which is formed with the inner conductor, should be matched to the detector, 50 coaxial circuits are generally desired for convenience. 6 Results The leakage power ratio is defined as the ratio of the power detected to a detector at the output of the triaxial unit to the power flowing through the internal flowing power (also through a 50 load). The relative leakage is the ratio: 1221IEZ = where E2is equivalent leakage voltage in external line; I1is the current flowing in internal line. The value must be under the requirement given by product norm.
