1、MIL-S-85b73 58 m 7777706 0376LIZ 7 MILITARY SPECIFICATION SWITCHING UNIT SA-2498/ARC f= 3 F4- MIL-S-85673 (AS) 7 JLY 1987 This specification is approved for use within the Naval Air Systems Command, Department of the Navy and is available for use by all Departments and Agencies of the Department of
2、Defense. I 1. SCOPE 1.1 Scope. This specification establishes the design, .performance, and acceptance requirements for Switching Unit SA-2498/ARC Rereinafter referred to as switching unit. APPLICABLE DOCUMENTS 2.1 Government documents. ti 2.1.1 Specifications, s-tandards and handbooks. The fol lowi
3、ng ns, standards and handbooks form a Dart of this specification t specified herein. Unless otherwise specified, the issues of these speci fi ca- the exten documents shall be those listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplement- thereto
4、, cited in the sol ici tation. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commanding Officer, Naval Air Engineering Center, Systems Engineering and Standardiza- tion Department (SESD) Code
5、53, Lakehurst, NJ 08733-5100 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. DISTRIBUTION STATEMENT A: Approved for public release; distribution is un1 imi ted. AMSC N/A a F -, THIS DOCUMENT CONTAINS ,$ PAGE
6、S. FSC 5821 Licensed by Information Handling ServicesSPECIFICATIONS Federal QQ-P-416 Mi 1 i tary MI L-P-116 MIL-C-172 MIL-B-5087 MIL-W-5088 MIL-E-5400 MI L-T-5422 MIL-C-5541 MIL-E-17555 MIL-T-18303 MIL-N-18307 MIL-S-19500 MIL-M-38510 MIL-C-38999 MIL-C-39018 MI L-H-46855 _ . MIL-S-85673 58 W 779790b
7、0376483 7 MIL-S-85673 (AS) Plating, Cadi um (Electrodeposi ted) Preservation-Packaging, Methods of Cases; Bases, Mounting; and Mounts, Vibration Bonding, Electrical, and Lightning Protection, for Aerospace Sy s tems Wiring; Aerospace Vehicle Electronic Equipment, Airborne, General Speci fi cation fo
8、r Testing, Environmental , Aircraft Electronic Equipment Chemical Conversion Coating on Aluminum and Al uminum Alloys E1 ec troni c and Electrical Equipment, Accessories, and Repair Parts, Packaging and Packing of Test Procedures; Preproduction, Acceptance and Life for Aircraft Electronic Equipment,
9、 Format for Nomencl ature and Identi fi cation for Electronic, Aeronautical, and Aeronautical Support Equipment Including Ground Support Equipment Semiconductor Devices, General Spec1 fication for Microcircui ts General Specification for Connectors, Electrical Circular, Miniature, High Densi ty, Qui
10、ck Disconnect, Environmental Resistant, Removable Crimp Contacts; General Speci fi cation for Capacitor, Fixed Electrolytic (Aluminum OxSde) , General Specification for Human Engineering Requirements for Military Systems, Equipment and Faci 1 i ties 2 Licensed by Information Handling ServicesMIL-S-5
11、673 58 m 9999906 0176484 O a f a MIL-P-55110 MIL-R-85664 MIL-R-85665 STANDARDS Federal FED-STD-595 Mi 1 i tary MIL-STD-129 MIL-STD-275 MIL-STD-415 MIL-STD-454 MIL-STD-461 MIL-STD-462 MIL-STD-471 MIL-STD-701 MI L-STD-704 MIL-STD-756 MIL-STD-781 MIL-STD-785 MIL-STD-794 MIL-STD-810 MIL-STD-883 MIL-STD-
12、965 MIL-S-85673(AS) Printed Wiring Boards Receiver-Transmitter, Radio RT-125OAIARC Receiver-Transmitter, Radio RT-l324A/ARC Federal Standard Col ors Marking for Shipment and Storage Printed Wiring for Electronic Equipmen Test Provisions for Electronic Systems and Associated Equipment, Design Cri ter
13、ia for El ectronic Equipments, General Requirements for Electromagnetic Emission and Susceptibility Measurements for the Control of Electromagnetic Interference Electromagnetic Interference Characteristics, Measurement of Maintainability Demonstration Lists of Standard Semiconductor Devices . A-ircr
14、af t El ectri c Power Charac teri s ti cs Re1 iabi 1 i ty Prediction Reliability Tests; Exponential Distribution Reliability Program for Systems and Equipment Development and Production Parts and Equipments, Procedures for Packaging and Packing of Environmental Test Methods Test Methods and Procedur
15、es for Microelectronics Parts Control Program 3 Licensed by Information Handling Services- . ML-S-BSb73 5 777770b 017b4BS 2 W MIL-S-85673 (AS) MI L - S TD - 14 72 MI L-STD-1562 MIL-STD-2074 MIL-STD-2076 Human Engineering Design Cri teria for Military Systems, Equipment and Faci 1 i ties Lists of Sta
16、ndard Microcircuits Failure Classification for Reliability Testing Unit Under Test Compatibility with Automatic Test Equipment, General Requirements for MIL-STD-2077 Test Program Sets, General Requirements for MIL-STD-2084 Maintainability of Avionics and Electronic Systems and Equipment, General Req
17、uirements for HANDBOOKS Mi 1 i tary MIL-HDBK-217 Electronic Equipment, Reliability Prediction of MIL-HDBK-235 Electromagnetic (Radiated) Environment Considerations for Design and Procurement of Electrical and E1 ec tronic Equipment, Subsystems, and Systems 2,1,2 Other Government documents. The follo
18、wing other Government - documents, form a part of this specification to the extent specified herein: Unless otherwise specified, the issues shall be those in effect on the date of the solici tation. DOCUMENTS Naval Air Systems Command AD-1115 Electromagnetic Compatibility Design Guide for Avionics a
19、nd Related Ground Support Equipment NS-6536 Process Speci fication Procedures and Requirements for Preparations and Soldering of Electrical Connections National Security Agency CSEEB-13 CSEEB-14 CS EEB-32 TSEC/KY-28 Speech Security Equipment Engineering Bulletin Communications Security Equipment Sys
20、tem Document for TSECIKY /57/58 TSECIKY-57/58 Communications Security Equipment Engineering Bulletin 4 Licensed by Information Handling ServicesMIL-S-85673(AS) Department of the Navy . NAVMAT P-4855.1 Navy Power Supply Re1 iabi 1 i ty . NAVMAT P-9492 Navy Manufacturing Screening Program (Copies of -
21、specifications, standards, handbooks, and other Government documents required by contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting activity.) 2.1.3 Order of precedence. In the event of a conflict between t
22、he text of this specification and the references cited herein, (except for associated specification shall take precedence. Nothing in this specification however, shall supersede applicable laws and regulations unless a specific exemption has been obtained. 3. O REQUIREMENTS - detail specifications,
23、specification sheets or MS standards). the text of this 3.1 Item description. The switching unit shall function exclusively as part of an equipment complement. the switching unit enables operator control led re-configuration capability. The equipment complement of the switching unit is shown in Tabl
24、e I. When used in conjunction with its complement Table I. Compatible equipment types Device Compatible Equipment Type Auto-Relay ControT Unit C-10777 A/ARC C-l1132/ARC C-l1628/ARC Radio Set AN/ARC-182 (V) AN/ARC-159 (VI -1 I COMSEC Encryption Device TSEC/KY-58 TSEC/KY -28 - 3.2 First article. When
25、specified in the contract or purchase order (see 6.2.1), a sample shall be subjected to first article inspection (see 4.4 and 6.4). 3.3 Parts. In the selection of paints, the prime considerations are fulfillmem performance requirements, logistics supportability and reliability assurance in a cost ef
26、fective design. The following shall govern I in parts selection. 1. Licensed by Information Handling Servicesa. Subassemblies shall be designed and fabricated to be repairable. a Maximum economic s,tandardtzation of par% and materials shall be exercised, Parts selection shall be made in the followfn
27、g order. of precedence: -. (1) Mit$Wy Sanbard parts shall be selected in accordance with MIL-STO-454, Requirement 22 (21 Nonstandard parts previously qualified for other programs. (3) Nonstandard parts. b. Nonstandard parts and nonestabli shed re1 iabi li ty mil i tary standard parts shall be screen
28、ed. to the requirements of the most similiar military standard or standard nonecwblished re1 iabili ty part. Integrated circuits and hybrids shall use MIL-STD-883, Method 5004, Class B, as a basis #or taiiored screens. Purchase specificattons shall specifically delineate screening requirements. 3.3.
29、1 Component rescreening. The contractor shall conduct 100 percent Functional and parametric checks of active coniponents shall be incoming inspection of all active components used in production equipment and spares. performed at the components rated temperature extremes and at ambient. Components wh
30、ich are not compliant with their specification shall not be used in the Switching Unit. 3.3.2 Parts derating and application. All parts used shall be applied well within their ratings. meaningful application conditions such as voltage, current, power, temperature, mechanical, and duty cycle. Electro
31、nc and electromechanical parts shall conform to Table II electronic parts derating for worst case electrical and environmental stress unless formal written approva? is received from the procuring activity prior to incorporation into the design. Part level stress analysis shall be used to verify that
32、 all parameter stresses are within the derated values at worst case circuit and environmental conditions. The following limitations on parts usage shall apply: lhe aerating shall encompass the appropriate and a, Prohibited application Non-hermetically sealed semiconductors except power transistors P
33、hoto couplers (photo transistors) Hot carrier (Schottky) rectifiers Microcircuit sockets Non-hermetical ly sealed wet tanta1 um capacitors 3.3.3 Parts control. The contractor shall establish and maintain a parts control program in accordance with the requirements of MIL-STD-965, Procedure I and as s
34、pecified herein. The program shall control part standardization and the criteria for the selection, application, and testing of parts to achieve the reliability required. As a minimum, a parts program equivalent to that specified herein shall be required of subcontractors and suppliers. 6 Licensed b
35、y Information Handling ServicesMIL-S-85673 (AS,) Table II. Electronic parts deratlng. Part Type Capacitor Resistors Diodes Transistors Integrated Circuits Digital Li near Transformers, Inductive Devices Parameter Applied Vol tage (Ripple Vol tage for Tantal um) Poker Vol tage Power Current Vol tage
36、Junction Tempera ture Power Vol tage Junction Temperature Fan-Out, Fan-In Junction Temperature Power Junction Temperature Maximum Ailowable Application Stress 50% of rating L 11 50% of rating 70% of rating 50% of rating . 75% of rating 60% of rating 21 55% of rating 60% of rating - 21 - 11 For solid
37、 tantalum and all electrolytic capacitors, the maximum applied voltage shall be not greater than 70 percent of the vendor rated value. “Applied voltage“ is the sum of the applfed peak ripple voltage and the applied DC vol tage. insure worst-case junction temperature is not greater than 110 degrees C
38、 at +71 degrees C ambient temperature. Any deviation requires procuring activity approval. Power semiconductor devices, on a very selective basis, may be mounted and operated with worst case junction temperatures not greater than 150 degrees C at +71 degrees C ambient temperatures. 21 Semiconductor
39、devices shall be mounted and operated in such manner to - 80% of rating 21 75% of rating - 21 Parts shall be used at a winding temperature of at least 30 degrees below rated temperature. In addi tion, the maximum vol tage between windings or between a winding and a shield shall be not greater than 6
40、0% of rated voltage for the steady state conditions and 90% of rated .voltage with transients. General purpose inductors, audio and power transformers shall be applied at fio more than 70% of rated current. 7 Licensed by Information Handling ServicesMIL-S-65b73 58 e f7979Ob 0376489 T MI L-S-85673 (A
41、S) 3.3.4 Non-standard parts approval, The contractor shall obtain procuring activity approval of all non-standard parts used in the equipment. Standard parts are defined in MIL-E-5400. In addition to the MIL-E-5400 requirements for standard parts, microelectronic parts are standard only if: a, The d
42、evice is listed in MIL-STD-1562, and b. (QPL), and Sources (at least two) are listed on the Qualified Parts List c. The part is procured from one of the qualified sources, and d. Quality level “B“ (or better) of MIL-M-38510 is required. The approval procedure shall be in accordance with MIL-E-5400 a
43、nd MIL-STD-965, Procedure I# standard parts will be based on: In addition to the requirements of MIL-E-5400, approval of non- a, Suitability for the application b. Conformance to this specification and to MIL-E-5400 c. Interchangeability d. Screening (burn-in) method 3.3.5 Samples of non-standard pa
44、rts and materials. Samples of non- standard parts and materials are not required unless specified in the contract, contract, the sample shall be in accordance with MIL-E-5400 (see 6,2.1). Where non-standard parts or materials samples are specified in the 3.3.6 Cabling and connections, 3.3.6.1 Cables
45、 and connectors, The switching unit shall provide for the The design of the use of cables and connectors in accordance with MIL-E-5400. connectors shall be such that improper assembly, mating or instal lation is impossible. Non-RF connectors shall meet the requirements of MIL-C-38999. Al 1 external
46、connectors shall be scoop-proof, have cadmium plating finish in accordance with QQ-P-416 (over a suitable underplating) to withstand a 500 hour salt test, and provide 360 degrees circumferential grounding techniques for groundfng prior to contact engagement. required operation using external wiring
47、in accordance with the applicable requirements of MIL-W-5088. The external wiring shall be unshielded, except that a minimum number of the individual wires may be shielded when demonstrated as necessary to meet interference control requirements and provide the assembly of the cable to its plugs may
48、be easily accomplished. External cables and that portion of the connectors attached to the cables shall not be supplied as part of the switching unit. 3.3.6.2 Interconnection cabling, The switching unit shall be capable of 3,3,7 Interchangeability. Physical and functional interchangeability shall ex
49、ist for all units and replaceable assemblies, subassemblies, and parts of the switching unit in accordance with MIL-E-5400. The switching unit shall 8 Licensed by Information Handling ServicesI l I I I I l l 1 , I i I I I I I I I I I I I I l I I l l I l l l be constructed to preclude the requirement for any adjustment when replacing an item by another item of the same type designation. 3.4 Design and construction. The switching unit shall conform with all the applicable requiremens of MIL-E-5400 for design and construction except where otherwise specified herein. acc
