ECA 215-1958 Broadcast Microphone Cables Basic Requirements for《广播传声器电缆的基本要求》.pdf

1、I +- , EIA 215 58 m 3234600 0063283 1 m EIA RS-215 9 October 1981 ACCEPTANCE NOTICE This non-Government document .was adopted on 9 October 1981 and is approved for use by the DoD, The indicated industry group has furnished the . clearance required by existing regulations. Copies of the document are

2、. stocked by DoD Single Stock Point, Naval Publications and Forms Center, 19120, for issue to DD activities only. Philadelphia, PA industry groups must obtain copies from EIA, Engineering Department, 2001 Eye Street, N.W., Washington, DC 20006. Contractors and Title of Document: EIA Standard for Bas

3、ic Requirements for Broadcast Microphone Cables Date of Specific Issue Adopted: November 1958 Releasing Indus try Group: Electronic Industries Association NOTICE: When reaffirmation, amendment, revision, or cancellation of this s tandard is initially proposed, the indus try group responsible for thi

4、s standard shall inform the military coordinating activity of the proposed change and reques t participation. Cus todians : Army - CE Navy - YD Air Fotce - 99 .- I Military Coordinating Activity: Navy - YD Project No. 5995-0099 i 1-j EIA 215 58 3234600 0063284 3 ElA STANDARD Basic Requirements for B

5、roadcast Mcrophone Cables RS-215 (Revision TR-130) November 1958 Engineering Department ELECTRON IC INDUSTRIES ASSOCIATION (Formerly RADIO=ELECTRONICS=TELEWSION MANUFACTURERS ASSOCIATION) er- - *- EIA 215 58 3234600 00b3285 5 = EIA standards are Bdopted in the public interest and are designed to eli

6、minate misunder- standings between the manufacturer and the purchaser and to assist the purchaser in selecting and obtaining without delay the proper product for its particular need. Existence of such stand- ards does not in any respect preclude any member or non-member of EIA from manufacturing or

7、selling produch not conforming to the standard. Any proposal of recommended standards and practices made by the Association is without any regard to whether or not their adoption may in any way involve patents on articles, materials or processes. By such action, the Association does not assume any l

8、iability to any patent owner, nor does it assume any obligation whatever to parties adopting the recommended standards or practices. Published by ELECTRONIC INDUSTRIES ASSOCIATION Engineering Department 2001 Eye Street, N. W., Washington, D. C. 20006 $1 .OO. 2-L EIA 225 58 m 3234600 0063286 7 m 0.10

9、 in. BASIC lUQUIREEdIBS FOR BROAIIWIH MKKOPHONE CABLES (From EIA Standard TR-180 and Sb*rdt Propoad Noe. 57.4 and 585 formuuted ZC The cable described by this standard consists of either two or three conductors of stranded, an- nealed, and tinned copper wire, insulated with synthetic or natural rubb

10、er, covered with a cotton wrap and a shield, and protected with an outer sheath of neoprene. 1.2. Application: This cable will be used primarily as a microphone cable in radio broadcasting service. A high degree of flexibility, resistance to breakage of conductors or shield by bending ati connectors

11、, and substantial resistance to wear of outer sheath, are imporlant requirements. 0.09 in. 2. CONSTRUXXONI 2.1 GeneralheIIsiOt Minimum thick- 0.812.i. pl.us ness at any point zero minus 0.016 in. : 0.030 in. TWO conductor Numberof Stan Each conductor shall be suitably wrapped with a separator condra

12、ting of a close wind, braid, or wrap of cotton in such manner cas not to matmially affect flexibility. 2.4 halation Ovar dnatomr Each conductor shall be insulated With a flexible dneulating compound conforming either to A.S.T.M. Tentative Specification D776, latest revision, a synthetic, or DS68, la

13、teat revision, a natural rubber. 2.5 Color Idsritifiuationr 2.5.1 Two conductor cable insulation to be colored red on one conductor and black on the other. 2.5.2 Three conductor able insulation to be colored red, black and green, respectivey. 2.5.3 Insulation colors shall conform to th0 late OR: Met

14、allic Braid Type-The shield shall consiat of #84 AWG tinned copper braid to the same specification as strands in conductors. This braid shall be a weave of 24 carriers, 5 ends and approximately 19.3 picks per inch, applied around the cotton braid. A close wind of 60-1 cotton shall be applied over th

15、e shield. 2.9 Sheath: The sheath shall be a smooth, synthetic com und. The physical and aging properties shall con- form to A.S.T.M. Tentative Specifications D7 i? 2,latest revision, a neoprene, except that, since this sheath is to be colored brown, the tensile etrength requirementi is reduced to 1,

16、600 lbs., per square inch. Te sheath is to be colored brown within the nominal and dark or deep limita as given in the latest issue of EIA Standard GEN-101A. 3. ELECTRICAL CHARACTERISTICS : 3.1 Dielectric Teat: The cable shall be capable of withstanding 1000 AC volts rms for a period of one mtnute b

17、etween conductors and between conductors and shield. The cable sheath shall be capable of withstanding 1000 AC volta between shield and ground (water) using water immersion. 3.2 Insulation Resistance: The cable shall have an insulation resistance of not less than 600 megohms per 1000 feet between co

18、nductors, and between each conductor and the shield. The measurement should be macle after one minute electrification, witit a continuous E.M.F. of from 100 to 600 volts. All testing methods should, in general, comply with A.S.T.M. Tentative Specification D470, latest revision. 3.3 Capacitance: It i

19、s required that the capacitanceat 1000 cps, between conductors, shall not execeed 60 ppf per foot and the capacitance at 1000 cps, between one conductor and the other conductor connected to the shield, shall not exceed 120 ppf per foot. 4. COLOR USAGE: The, following color code usage, including conn

20、ections t the EIA Standard Microphone Connectors, shall be standard: Terminal on EIA Circuit Microphone Standard Cable Conductor of Conductor of Conditions Polarization Connector TR-I18 Two Conductor Cable Three Conductor Cable High Side Terminal producing 1 Red Red (on unbalanced positive voltage Audio system) with positive pressure pulse Low Side Other terminal of 2 (on unbalanced microphone Audio system) Black Black Ground Ground terminal G Shield Green and/or Shield