1、NIL-T-LSSL4F W 9999906 2953348 440 MIL-T-I5514F(NAVY) 8 September 1993 SUPERSEDING 11 July 1966 (See 6.8) MIL-T-l5514E(NAVY) MILITARY SPECIFICATION TELEPHONE EQUIPMENT, SOUND POWERED TELEPHONE GENERAL SPECIFICATION FOR. HANDSET, HEADSET, AND HEADSET-NOISE ATTENUATING This specification is approved f
2、or use by the Department of the Navy and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers sound powered telephone handsets, headsets, and headset-noise attenuating for Naval shipboard and shore use. 1.2 Classification. T
3、elephone subsets are of the following types as a specified (see 6.2): (a) Type H-200/U - Headset (b) Type H-202/U - Headset-noise attenuating. (c) Type H-203/U - Handset. I I Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this docu
4、ment should be addressed to: Commander, SEA 03442, Naval Sea Systems Command, 2531 Jefferson Davis Hwy., Arlington, VA 22242-5160 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC N/A FSC 5965 DISTRIBUTIO
5、N STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications. standards, and handbooks. The following specifi- cations, s
6、tandards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation (
7、see 6.2). SPECIFICATIONS FEDERAL QQ-S-571 - Solder, Tin Alloy: Tin-Lead Alloy; and Lead Alloy. MILITARY MIL- S -901 MTL-A- MIL-H-24616 MIL- J - 24649 MIL-H-81735 MIL-H-87819 - Shock Tests, H.I. (High-Impact) Shipboard Machinery, Equipment, and Systems, Requirements for. ,23899 - Aural Protector, Sou
8、nd. - Helmet Phonetalker MK 4 Mod O. - Jackbox, Jack and Plug for Telephone, Sound Powered. - Helmets, Flight Deck Crewmans, Impact Resistant, - Headset-Microphone, Headset-Electrical, Headset-Non Electrical (Hearing Protective Type, High Ambient Noise Levels) General Specification For. STANDARDS MI
9、LITARY MIL-STD-130 - Identification Marking of U.S. Military Property. MIL-STD-454 - Standard General Requirements for Electronic Equip- MIL-STD-167-1- Mechanical Vibration s of Shipboard Equipment MIL-STD-1399 - Interface Standard for Shipboard Systems ment. (Type I - Environmental) Section 72 Part
10、 2, Blast Environment, Gun Muzzle (Unless otherwise indicated, copies of federal and military specifications, standards, and handbooks are available from the Standardization Documents Order Desk, BLDG. 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.) 2.2 Non-Government publications. The followi
11、ng document(s) form a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents which are DOD adopted are those listed in the issue of the DODISS cited in the solicitation. Unless otherwise specified, the issues of documents not listed in the DODIS
12、S are the issues of the documents cited in the solicitation (see 6.2). AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) 269 - Standard Method for Measuring Transmission Performance of S1.12 - Specifications for Laboratory Standard Microphones. S3.2 - Method for Measuring the Intelligibility of Speech Ov
13、er Telephone Sets. O Communication Systems. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-155L45 m 999990b 1953350 OT9 m MIL-T-l5514F(NAW) S3.7 - Method for Coupler Calibration of Earphones. (Application for copies should be addressed to th
14、e American National Standards Institute, 11 West 42nd Street, 13th Floor, New York, NY 10036.) AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) F 1166 - Standard Practices for Human Engineering Design for Marine Systems Equipment and Facilities. D 3951 - Standard Practice for Commercial Packaging.
15、D 4169 - Performance Testing for Shipping Containers and Systems, Practice of (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103-1187) INTERNATIONAL ELECTROTECHNICAL COMMISSION (IEC) 68-2-llKa - Basic Environmental
16、Testing Procedures, Part 2: Tests, Test Ka: Salt Mist. (Application for copies should be addressed to the American National Standards Institute, 1430 Broadway, New York, NY 10018) 2.3 Order of Drecedence. In the event of a conflict between the text of this document and the references cited herein (e
17、xcept for related associated detail specifications, specifications, specification sheets or MS standards), the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS. 3.1 Fir
18、st article. When specified (see 6.2), a sample shall be subjected to first article inspection (see 6.4) in accordance with 4.4. 3.2 General requirements. The equipment shall be in accordance with the applicable requirements of MIL-STD-454 in addition to the requirements specified herein. Whenever a
19、requirement of MIL-STD-454 conflicts with a requirement of this specification, the requirement of this specification shall govern. 3.2.1 Technology. Equipment manufactured in accordance with this document may utilize new technology provided form, fit, and function are maintained. The equipments manu
20、factured incorporating new technology must meet or exceed the requirements of this document (see 6.6). 3.2.2 Sound Dowered telephone requirements. The sound powered telephone sets shall provide high intelligibility, ruggedness, reliability, simplicity, and ease of maintenance and operation (see 6.3)
21、. The sound powered telephone sets shall function to provide voice communication completely independent of any external electrical energy. O 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-flIL-T-155II4F 977770b II753351 T35 MIL-T-I5514F(NAVY) 3.2.
22、3 Salt fog. The sound powered telephone sets shall be subjected to a 20 percent hot salt spray, and hot air blast as specified in 4.6.3. Minute examina- tion of the sound powered telephone sets after the salt fog test shall show no corrosion or other damage due to salt fog. Water shall not have ente
23、red into the cavities behind the diaphragm, nor into the electrical connections. In addition, all parts shall function satisfactorily after the material is reassembled. The sound powered telephone sets shall show no change in the acoustic or frequency response in excess of 1.5 decibels (dB) as speci
24、fied in 3.5.9 and 3.5.10. 3.2.4 Shock. Sound powered telephone sets shall be subjected to a grade A, class 1, light weight, type A shock as specified in 4.6.4. Upon completion of the test there shall be no evidence of physical or electrical defects, except minor chipping or scratches. The sound powe
25、red telephone sets shall show no change in the acoustic or frequency response in excess of 1.5 dB as specified in 3.5.9 and 3.5.10. 3.2.5 Random drop. There shall be no evidence of breaking, cracking, or other physical or electrical damage to the sound powered telephone sets when the sound powered t
26、elephone sets are tested as specified in 4.6.5. The sound powered telephone sets shall show no change in the acoustic or frequency response in excess of 1.5 dB as specified in 3.5.9 and 3.5.10. 3.2.6 InterchanEeabilitv and standardization. In addition to the require- ments of MIL-STD-454 Requirement
27、 7 all parts having the same manufacturers part number shall be functionally and dimensionally interchangeable (see 6.3). 3.2.7 Designation - and marking. Brass or nickel-copper identification plates shall be provided as part of the equipment. Assemblies and parts shall be marked for identification
28、in accordance with MIL-STD-130. Unless otherwise specified (see 6.2), equipment identification shall include the following information: (a) Sound powered handset (or headset). (b) Type designation. (c) Stock number. (d) Manufacturers name. (e) Contract or order number. (f) Inspection stamp. 3.3 Elec
29、trical requirements. 3.3.1 Insulation resistance. The insulation resistance of sound powered telephone sets shall be greater than 10 megohms when subjected to the test as specified in 4.6.7. 3.3.2 Push-to-talk switch. The push-to-talk switch shall be a non-locking, normally open, spring return switc
30、h designed and located to permit ready operation with either the thumb or finger. The switch shall have one set of make contacts. The switch shall disconnect the microphone transducer from the external circuit when in the open position and shall connect the microphone transducer to the external circ
31、uit when in the closed (depressed) position. The switch button shall be insulated from the switch and the electrical circuit. Button and switch assemblies shall show no undue pitting of the contacts, bending of springs, or failure of parts after 100,000 cycles of operation when tested as specified i
32、n 4.6.8. 4 r Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-flIL-T-1551iF D 9999906 L953352 971 D 3.4 Materials. 3.4.1 Wire terminals. Solderless wire terminals in accordance with require- ment 19 of MIL-STD-454 are preferred. Wires subject to break
33、age at the connection shall be provided with terminals that grip the wire insulation. Where practical, wires soldered to terminals shall be looped not less than once and not greater than twice around the terminal before soldering. Solder shall be in accordance with type S, composition Sn60 of QQ-S-5
34、71. 3.4.2 Recovered materials. Unless otherwise specified herein, all equip- ment, material, and articles incorporated in the products covered by this specification shall be new and may be fabricated using materials produced from recovered materials to the maximum extent practicable without jeopardi
35、zing the intended use. The term “recovered materials“ means materials which have been collected or recovered from solid waste and reprocessed to-become a source of raw materials, as opposed to virgin raw materials. None of the above shall be interpreted to mean that the use of used or rebuilt produc
36、ts is allowed under this specification unless otherwise specifically specified. 3.4.3 Toxic products. The material shall have no adverse effect on the health of personnel when used for its intended purpose. Questions pertaining to this effect shall be referred by the contracting activity to the appr
37、opriate departmental medical service who will act as an advisor to the Contracting agency. 3.5 Sound Dowered transducers - detailed design. 3.5.1 Sound powered transducer function. The microphone transducer shall be. the primarily generator of electrical energy, sound being the only source of input
38、energy. The receiver transducer shall receiving energy generated by the micro- phone transducer over 300 feet of 1/22 AWG wire (twisted pair), convert the energy received into sound, and shall reproduce the transmitted signal with an acoustical and frequency response as specified in 3.5.9 and 3.5.10
39、. The microphone and receiver transducers, in an emergency, shall function bidirectionally (receive and transmit). 3.5.2 Sound powered transducers. The sound powered transducer shall consist of the necessary permanent magnet, armature, coils, and diaphragm assembly with all parts, other than the ext
40、erior of the diaphragm assembly, enclosed in a dust- proof housing and ready for insertion in the microphone or receiver shell. The sound powered transducers shall be designed so that they may be quickly replaced in their shells without disturbing any electrical wiring; prevent exposure of the armat
41、ure assembly to foreign matter; and prevent phase changes when replacing transducer. Electrical connections between the sound powered transducer and the circuit contact in the shell shall be made by fine silver-plated spring tensioned contacts (plating shall be not less than 0.001 inch thick) or oth
42、er materials as specifically approved by the command or agency concerned (see 6.6). 3.5.3 Magnetic material. The magnetic material shall be the smallest size and weight possible, consistent with required magnetic strength, and shall be selected for its retentivity and corrosion-resistant properties.
43、 The permanent magnets shall be held in place in the transducer by a positive mechanical device 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-155LYF W 9979906 I1953353 808 3.5.4 Internal connection. Internal connections of the transducer sh
44、all be soldered. Solder shall be in accordance with type S, composition Sn60 of QQ-S-571. 3.5.5 ImDedance. The impedance of the sound powered transducers shall be of the following values when measured as specified in 4.6.9. Transducer Ohms Handset and headset receivers 1200 f 120 (see 4.6.9.1) H-203
45、/U handset microphone 1200 f 120 (see 4.6.9.2) Headset microphones 110 T 11 (see 4.6.9.3) 3.5.6 Microphone transducer. The output voltage of the microphone transducer shall be 25 f 2 millivolts over a frequency range as specified in 3.5.10 when tested as specified in 4.6.10. 3.5.7 Receiver transduce
46、r. The audible output of the receiver transducer shall comply with 3.5.9 when tested as specified in 4.6.12 or 4.6.12.1. 3.5.8 Stabilitv. The stability of the armature shall be such that, when pressed against either pole piece, it shall not strike to the opposite pole piece upon release when tested
47、as specified in 4.6.13. 3.5.9 Acoustic response. Sound powered telephone sets shall meet the minimum output requirements shown in table I. For approval, none of the sets tested shall fall below the minimum response indicated when tested as specified in 4.6.12. For quality conformance inspection an a
48、llowance of plus or minus 1 Db will be allowed in each frequency band. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NIL-T-I55I4F m wwqob 1953354 744 m MIL-T-l5514F(NAVY) TABLE I. Minimum response (in Db referred to 20 microDascals at the speech
49、meter). Number of sets in parallel on the line Frequency H-200/U H-203/U H-200/U band (Hz) Ten Two Two or H- 202/U 750 - 1250 94 102 103 1800 - 2600 97 105 103 1250 - 1750 90 98 96 500 - 2500 101 102 94 H - 203/U H- 202/U 3.5.10 Frecluencv resvonse. The overall frequency response for two sound powered telephone sets of the same type operating in parallel shall not fall below the curve shown on figure 1 when tested as specified in 4.6.14. 3.5.11 Magnetic - stability
