1、MIL-D-81688A (AS) 1 May 1977 SUPERSEDING 29 October 1971 MIL-D-81688 (AS) COWNTS R RECWNENDATIWS WHICH MAY BE OF USE IN IMPROVING THIS DOCWENT MAY 6E SENT TO THE PREPARING ACTIVITY WHEN A SELF-ADDRESSED STkWDARDIZATION DOCWENT IMPROVEMENT PROPOSAL (OD FORM 1426) APPEARS AT THE END OF THIS DOCUMENT,
2、OR BY LETTER ADDRESSED TO THE COGNIZANT ACTIVITY. 1 MILITARY SPECIFICATION DISPLAY SET, MISSION RECORDER AN/U?Q-SB This specification has been approved by the Naval Air Systems Command, Department of the Navy. 1. SCOPE * p , ,- Provided by IHSNot for ResaleNo reproduction or networking permitted wit
3、hout license from IHS-,-,-MIL-D-L6A 58 m 4999906 0373949 Li m MIL-D-81688A (AS) 1.3 Associated Equipment - This equipment shall operate with the associated equipment listed in 6.7. 2. APPLICABLE DOCUMENTS k2.1 General - The following documents form a part of this specification to the extent specifie
4、d herein. Listed are the issues of the documents in effect for the previous procurement. However, in lieu of the issue listed, the contractor shall use the latest issue in effect of these documents where feasible. If the use of the latest issue will affect design performance, or interchangeability o
5、f any replaceable part, then the issue of the document listed below shall be used. SPECIFICATIONS Military MIL-S-901C 15 January 1963 and Amendment 1 5 September 1963 MIL-C-915C 15 March 1968 MIL-M-7793C 14 August 1961 and Amendment 2 30 July 1967 MIL-E-16400F 24 February 1966 and Amendment 4 15 May
6、 1968 MIL-E-17555F 3 July 1968 and Amendment 1 10 January 1969 MIL-T-18303B 1 September 1966 MIL-N-18307C 1 October 1958 and Amendment 4 19 September 1966 MIL-C-21097B 4 September 1963 and Amendment 3 15 November 1966 Shock Tests, H. I. (High-Impact) : Shipboard Machinery, Equipment and Systems, Req
7、uire- ments for Cable, Electrical, Special Purpose, General Specification for Meter, Time Totalizing Electronic Equipment, General Specification Naval Ship and Shore: Electronic and Electrical Equipment and Asso- ciated Repair Parts, Preparation or Delivery of Test Procedures; Preproduction and Acce
8、ptance for Aircraft Electronic Equipment, Format for Nomenclature and Identification for Electronic; Aeronautical, and Aeronautical Support Equip- ment Including Ground Support Equipment Connector, Electrical, Printed Wiring Board, General Purpose, General Specification for Provided by IHSNot for Re
9、saleNo reproduction or networking permitted without license from IHS-,-,-MIL-D-8LbA 58 7777706 0373750 O MIL-D-81688A (AS) Naval Air Systems Command AR-1OA 1 January 1969 AR-34 26 March 1969 STANDARDS Military MIL-STD-167 20 December 1954 MIL-STD-461A 1 August 1968 and Notice 1 7 February 1969 MIL-S
10、TD-749A 1 June 1965 and Notice 1 28 September 1965 MIL-STD-761B 15 July 1965 MIL-STD-781B 15 November 1967 and Change 1 28 July 1969 MIL-STD-785A 28 March 1969 MIL-STD-794 11 March 1969 MS 3120D 15 February 1967 MS 17 3 2 5C 31 December 1969 MS24266G 14 February 1967 Maintainability of Avionic Equip
11、ment and Systems General Requirements for Failure Classification for Reliability Testing, General Requirements for Mechanical Vibrations of Shipboard Equipment Electronic Interference Characteristics Requirements for Equipment Preparation and Submission of Data for Approval of Nonstandard Electronic
12、 Parts Electrical Power, Alternating Current for Shipboard Use Characteristics and Utilization of Reliability Test Exponential Distribution Reliability Program for Systems and Equipment Development and Production Parts and Equipment, Procedures for Packaging and Packing of Connector, Receptacle, Ele
13、ctric, Crimp-type, Wall Mounting, Flange, No. 4 Holes, Bayonet Coupling Meter, Time Totalizing Digital, 115 Volt, 60 or 400 Hertz Connector, Plug, Electrical - Straight Minia- ture - 3- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-D-BLbBA 5B m
14、 7777706 017195L 2 m MIL-D-816888 (AS) MS28053F 31 December 1969 400 Hertz Meter, Time Totalizing Digital, 115 Volts, MS3102C 15 May 1969 Connector, Receptacle, Electric, Box Mounting, Solder Contacts, AN Type 2.1.1 Availability of Documents - (i) When requesting specifications, standards, drawings,
15、 and publications, refer to both title and number. Copies of this specification and applicable specifications required by contractors in connection with specific procurement functions may be obtained upon application to the Commanding Officer, Publications and Forms Center, Code 105, 5801 Tabor Aven
16、ue, Philadelphia, Pennsylvania 19120. -4- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-D-8Lb88A 58 77777Ob OL7L752 LI W MIL-D-81688A (AS) 3. REQUIREMENTS 3.1 . Preproduction. - This specification makes provisions for preproduction testing . 3.
17、2 Materials, Parts and Processes - In the selection of materials, parts and processes, fulfillment of major design objectives shall be the prime consideration. govern : In so doing, the following shall (1) Microelectronic technology shall be considered. When used, microelectronic devices shall have
18、two or more sources and the device from each source shall be interchangeable. Interchangeability shall be demonstrated by random installation of devices from two or more sources during fabrication of production quantities. Successful operation of the equipment with a random mixing of device sources
19、shall be proof of interchangeability. Unsuccessful operation of the equipment shall be evaluated to determine if a device is faulty or not interchange- able. (2) Other parts and materials requirements shall con- form to Spe.cification MIL-E-16400. (3) Nonrepairable subassemblies shall be used in acc
20、ordance with paragraph 3.1.3(2) of Specification AR-10. (4) When previously produced models of this equip- ment did not use nonrepairable subassemblies, the design shall not be changed to employ nonrepairable assemblies without the approval of the procuring activity . -5- Provided by IHSNot for Resa
21、leNo reproduction or networking permitted without license from IHS-,-,-MIL-D-81688A (AS) 3.2.1 Nonstandard Parts and Material Approval - Approval for use of nonstandard parts and materials (including electron tubes, transistors, diodes and microelectronics devices) shall be obtained as outlined in s
22、pecification MIL-E-16400. in accordance with Step I and Step II only of MIL-STD-749. Nonstandard parts data shall be 3.2.2 Modules - The electronic portions of the equipment shall be functionally modularized in accordance with Section 3.5 of this specification. 3.3 Design and Construction - The equi
23、pment shall be basically identical in design, construction, woriunanship, parts, pro- cesses and materials to the prototype unitS.of the AN/PQ-5 which were designed in accordance with MIL-E-16400 except as otherwise specified herein. 3.3.1 Total Weight - The total weight of the equipment, excluding
24、cables, shall be a minimum consistent with good design and shall not exceed 975 pounds. 3.3.2 Reliability - The contractor shall conduct a relia- On a reorder from a cup- bility program using MIL-STD-785 as a guide. plier who has previously produced the equipment, the program previously used may be
25、continued unless otherwise indicated in the contract or order. 3.3.2.1 Operational Stability - The equipment shall operate with satisfactory performance, continuously or intermittently for a. peritod of at least 200 hours without the necessity for readjustment of any controls which are inaccessible
26、to the operator during normal use. 3.3.2.2 Operating Life - The equipment shall have a total Parts requiring scheduled replacement shall be specified operating life of 10,000 hours with reasonable servicing and replace- ment of parts. by the contractor. 3.3.2.3 Reliability in Mean Time Between Failu
27、re (MTBF) - The equipment, including built-in-test provisions. shall have 200 hours of mean (operating) time between failures when tested and accepted as outlined under the requirements of 4.4.3. 3.3.2.4 . Time Totalizing Meter - The following units shall - contain time totalizing meters in accordan
28、ce with Specification MIL- M-7793. -6- .-. .i .-. : - -. I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-D-8L688A 58 9 9999906 OL7L75L1 8 MIL-D-81688A (AS) - Unit Type of Meter Al Hard Copy Radar Display MS173 25-2 A2 Data Display MS17325-2 A4
29、Radar Display MS17325-2 A6 Frequency Converter MS 28 053 -5 A7 Power Supply A MS 17325-2 A8 Power Supply B MS 1 7 3 2 5-2 3.3.3 Cabling and Connections - 3.3.3.1 Cables and Connectors - The equipment shall provide for the use of cables and connectors in accordance with Specification MIL-E-16400. 3.3
30、.3.2 Interconnecting Cabling - The equipment shall be capable of satisfactory operation using external wiring in accordance with the applicable requirements of Specification MIL-C-915. external wiring shall be unshielded, except that a minimum number of individual wires may be shielded when demonstr
31、ated as necessary to meet interference control requirements and provided the assembly of the cable to its plugs may be easily accomplished. that portion of the connectors attached to the cables shall be supplied as part of the equipment. The External cables and *3.3.4 Control Panels - Ail rack or co
32、nsole mounted control panels shall conform to the applicable requirements of MIL-E-16400. The configuration of all control panels must be approved by the pro- curing activity prior to Preproduction Testing. 3.3.5 Interchangeability - The equipment shall meet the interchangeability requirements of MI
33、L-E-16400. *3.3.6 Interference Control - The generation of radio inter- ference by the equipment and the vulnerability of the equipment to radio - - interference shall meet the class IC equipment requirements of MIL-STD- 461, Test Methods CE03, CSO1, CS02, CS06, RE02, RSO1, RSO2-2, and RS03. Conduct
34、ed and radiated emissions from. 30 Hz to 5 .kHz shall not exceed the limits of CEO1 and REO1 by more than 20 dB. from 5 kHz to 20 kHz shall not exceed the limits of CEO1 by more than 15 dB. The equipment shall meet the requirements of test method REO1 for frequencies above 5 IcHz. Magnetic interfere
35、nce measurements shall be made at a distance of 24 inches, minimum, from the face of the CRT. Conducted emissions 3.3.7 Provisions for Maintainability - Construction and packaging shall be as outlined in paragraphs 3.1.2, 3.1.4 and 3.1.5 of Specification AR-10. -7- Provided by IHSNot for ResaleNo re
36、production or networking permitted without license from IHS-,-,-MIL-D-8Lb88A 58 m 77799Ob 0171955 T m MIL-D-81688A (AS) 3.3.7.1 Weight of WRAs - The weights of the individual WRAs shall not exceed the weights specified in section 3.5. 3.3.7.2 Test Points - Test points shall be provided to aid Test p
37、oints shall be in accordance in the maintenance of the equipment. with section 3.5. 3.3.7.3 Organizational Level Maintenance - Equipment main- tenance at the organizational level shall be performed using the built- in-test (BIT) features. After a fault has been detected by the BIT feature, a built-i
38、n oscilloscope shall be used to assist in fault isolation to a replaceable assembly (card) level, 90 percent of faults shall be located to the replaceable assembly level by this method. Mean-Time-To-Fault-Isolation (MTTFI) to a replaceable assembly shall be 30 minutes. The *3.3.7.4 Accessibility - T
39、he Hard Copy Radar Display and Data Display WRAs shall be mounted on rotating slides, permitting the WRAs to swing downward. All other units, except the Blower shall be mounted on regular chassis slides. 3.3.8 Nomenclature and Nameplates - Nomenclature assign- ment and nameplate approval for equipme
40、nt identification shall be in accordance with Specification MIL-N-18307. down to the WRA level. Name tags shall be applied 3.3.9 Safety. - Provisions for personnel and equipment safety shall be in accordance with MIL-E-16400. 3.3.10 Standard Conditions - The following conditions shall be used to est
41、ablish normal perf ormance characteristics under standard conditions and for making laboratory bench tests. Temperature Room.Ambient (25C 5 10C) Altitude Normal ground Vibration None Humidity Room ambient up to 95% relative humid i ty 115 V, AC + 5%; 60 Hz, + 5% - - Input power voltage 3.3.11 Servic
42、e Conditions - The equipment shall operate satisfactorily under any of the environmental conditions or reasonable combination of these conditions as specified in Specification MIL-E- 16400F, and amendment 4, for Class 2 equipment, except as modified herein. Provided by IHSNot for ResaleNo reproducti
43、on or networking permitted without license from IHS-,-,-MIL-D-81688A (AS) 3.3.11.1 Vibration - The equipment shall be capable of meeting the type I vibration requirements of MIL-STD-167 with excep- tion that vibration in the side to side axis shall not exceed 20 Hz with the top of the cabinet suppor
44、ted. 3.3.11.2 Shock - The equipment shall be capable of withstand- ing Grade B shock testing requirements of MIL-S-901. 3.3.12 Warm-Up Time - The time requirement for the equip- ment to warm-up prior to operation shall be kept to a minimum and shall not exceed 3 minutes under standard conditions and
45、 5 minutes at extreme service conditions. 3.3.13 Input Electrical Power - The equipment shall be supplied with the power cable, terminated with a type UP131M plug. 3.3.13.1 Operating Power - The equipment shall meet all the applicable requirements of MIL-STD-761 and shall give specified per- formanc
46、e when energized from the following power source having charac- teristics and limits as defined in MIL,-STD-761. The power required shall not exceed the specified amount. (1) AC Power (Single Phase), 115V, 60 Hz, Type I, 1500 VA. 3.3.13.2 Overload Protection - Overload protection for the equipment s
47、hall be provided in.the equipment. of the equipment which are likely to carry an overload due to any failure or poor adjustment shall be proportioned to withstand such overload without permanent damage to the equipment or shall have suita- ble protective devices. shall be held to a minimum. All part
48、s and circuits The use of fuses and other protective devices 3.3.13.3 Undervoltage Protection - The equipment shall not be damaged by voltage below the minimum specified herein and shall automatically resume normal operation when the voltage returns within limits. 3.3.13.4 High Voltage Delay - The e
49、quipment shall delay application of high voltage to the anodes of the radar display indi- cators for 30 seconds after the application of power voltage. 3.3.14 Cooling - Cooling for the equipment shall comply All necessary with the requirements of Specification MIL-E-16400 and shall not require the use of specific ducted external cooling. fans and/or heaters shall be supplied as part of the equipment. -9
