1、 flIL-D-8i873 58 m 9977906 OL72Lbll b F- o1-V 17 December 1975 MIL-D-81873(AS) - 14 IL I TARY SPEC I FI CATI ON DETECTING-RANGING SET, SONAR AN/AQS-l3B This specification has been approved by the Naval AirSystems Comnand, Department of the Nvy. 1. SCOPE SCO e - The equipment covered by this specific
2、ation shall provide a lightwei Bases, Mounting; and Mounts, Vi bration (for use with Electronic Equipment in Aircraft) Wiring; Aircraft, Installation of Electronic Equipment , Ai rcraft General Specification for Testing, Envi ronmental , Aircraft Electronic Equi pment Interference Control Requiremen
3、ts , Aircraft Equipment Control Panel ; Aircraft Equipment, Rack or Console Mounted Panels, Information, Integrally Illuminated Meter, Time Totalizing Electronic and Electrical Equipment and Associated Repair Parts, Preparation for Delivery of Test Procedures ; Preproducti on and Acceptance , For Ai
4、rcraft Electronic Equipment, Format for Nomenclature and Namepl ates for Aeronautical Electronic and Associated Equipment Thermal Performance Evaluation, Ai rbome Electronic Equipment, General Specification for Indi cator, Elapsed Time I Electrochemi cal Detecting-Ranging Set, Sonar AiWAQS-13A 2 Lic
5、ensed by Information Handling ServicesPub and ci f i ng Phi - MIL-D-81873 58 W 977770b 0172Lbb T m MI L-D-81873 (AS ) Naval Air Systems Comnand AR- 5 Microelectronic Devices Used in Avionic Equ Procedures for Selection and Approval of AR- 8 Versatile Avionic Shop Test System Compatib General Requi r
6、ements for AR- 9 Versatile Av Requi rements AR- 1 O Maintainabil General Requ pmen t , lity, onic Shop Test Programs, General for ty of Avionics Equipment and Systems, rements for AR- 34 Fail Ure Classification for Reli ab51 i ty Testing, General Requi rements for STANDARDS Mi 1 i tary MI L-STD- 704
7、 MIL-STD-781 MIL - STD- 785 MIL-STD- 794 Electric Power, Aircraft, Characteristics and Utilization of Re1 iabi 1 i ty Tests , Exponential Di s tri bution Requirements for Reliability Program for System and Equipment Deve1 opment and Production Parts and Equipments Procedures for Packaging and Packin
8、g of Fe der al FE D-STD- 59 5 Colors PUBLICATIONS EI -636 Avionics Install ation Instructions for Detecting- ET-636 Ranging Set, Sonar AN/AQS-l3B Avionics Bench, Preflight and Flight Test Instructions for Detecting-Ranging Set, AN/AQS-l3B 2.1.1 Avai 1 abi 1 i ty of Documents When requesting specific
9、ations, standards, drawings, and Copies of this specification. ications refer to both title and number. applicable specifications required by contractors in connection with spe- c procurement functions may be obtained upon application to the Command- Officer, Publications and Forms Center, Code 105,
10、 5801 Tabor Avenue, adel phi a, Pennsyl vani a 19120. 3 Licensed by Information Handling Services_ - _ NIL-D-81i83 58 M 999906 0172167 1 MIL-D-81873 (AS) 3, REQUIREMENTS preproduction testing . materials, fulfillment of major design objectives shall be the prime con- sideration. microelectronic item
11、s shall conform to requirements specified herein. to Specification MIL-E-5400. with Specification AR-10 and as outlined in Specification MIL-E-5400. not use nonrepairable subassemblies, the design shall not be changed to employ nonrepairable assembl ies without the approval of the procuring activity
12、. use of nonstandard parts and materials (including electron tubes, transistors, diodes, and thin and thick film hybrids) other than monolithic microelectronic devices shall be obtained as outlined .in Specification MIL-E-5400. Monolithic microelectronic devices shall be approved as outlined in AR-5
13、. tticroelectronic Modular Assemblies - Microelectronic Modular Assemblies shall meet the requirements of Specification AR-10. Modules - The electronic portions of the equipment shall be functionally modularized in accordance with Specification AR-10. Design and Construction - The equipment shall co
14、nform with al 1 the appl icable requirements of Specification MIL-E-5400 for design, con- struction, and workmanship, except as otherwise specified herein. cables, shall be a minimum consistent with good design and shall not exceed 598.3 pounds. 3.3.2 Reliabilit - The contractor shall conduct a reli
15、ability program using MIL- T -7135 as a guide. On a reorder from a supplier who has previously produced the equipment, the program previously used may be continued unless otherwise indicated in the contract or order, satisfactory performance, continuously or intermittently, for a period of at least
16、350 hours without the necessity for readjustment of any controls which are inaccessible to the operator during normal use. 3.1 3.2 Preproduction - This specification makes provision for Parts and Materials - In the selection of parts and In so doing, the following shall govern: (1) (2) Other parts a
17、nd materials requirements shall conform (3) Nonrepairable subassembl ies shall be used in accordance (4) When previously produced models of this equipment did Microelectronic technology shall be considered and 3.2.1 Nonstandard Parts and. Materials Approval - Approval for the 3.2.2 3.2.3 3.3 3.3.1 T
18、otal Weight - The total weight of the equipment, excluding 3.3.2.1 Operational Stability. - The equipment shall operate with 4 Licensed by Information Handling ServicesO . 4 3.3.2.2 Operating Life - The equipment shall have a total operating Parts life of 5000 hours with reasonable servicing and rep
19、lacement of parts. requiring scheduled replacement shall be specified by the contractor. Reliability In Mean Time Between Failure (MTBF) - The equip- ment specified in 3.5.1 through 3.5.7, including any Built-in Test provisions, shall be tested as a subsystem composed of one each of the referenced e
20、quip- ments for re1 iabi 1 i ty demonstrati on purposes , and shall have a mean (operat- ing) time between failures of 350 hours when tested and accepted as outlined under the requirements of 4.4.3. Time Totalizing Meter - The following units shall contain time totalizing meters in accordance with S
21、pecification MIL-M-7793 or MIL-1-81219. 3.3.2.3 3.3.2.4 Unit Type of Meter Receiver, Sonar R-1695/AQS-l3B MIL -M-7793 I nd i cat or, Azimuth- Ran ge I P- 1 045/AQS- 1 3B MIL-t4-7793 Transmitter, Sonar T-l178/AQS-l3B MIL-M-7793 Control Dome C-8598/AQS-l3B MIL-1-81219 3.3.3 Cabling and Connections - 3
22、.3.3.1 Cables and Connectors - The equipment shall provide for the use of cables and connectors in accordance with Specification MIL-E-5400. 3.3.3.2 Interconnection Cabling - The equipment shall be capable of satisfactory operation using external wiring in accordance with the applicable requirements
23、 of Specification MIL-W-5088. The external wiring shall be un- shielded, except that a minimum number of the individual wires may be shielded when demonstrated as necessary to meet interference control -requi rements and provided the assembly of the cable to its plugs may be easily. accomplished. Ex
24、ternal cables and that portion of the connectors attached to the cables shall not be supplied as part of the equipment. 3.3.4 Control Panels - All rack or console-mounted control panels shall conform to the applicable requirements of Specification MIL-C-6781 except the edge-lighted panels may be 0.3
25、50 inch maximum thickness. shall be +28 Vdc. procuring activity prior to preproduction testing. panel shall conform to Specification MIL-P-7788 as fol 1 ows : The lamp voltage The configuration of all panels shall be approved by the The lighting of the plastic - Unit MIL-P-7788 Requirement Receiver.
26、 Sonar R-1695/AOS-l3B Class 2R Tme V I nd Con Ind Licensed by Information Handling Services3.3.5 3.3.6 Interchangeabi 1 i ty - The equipment shall meet the inter- changeabil ity requirements of Specification MIL-E-5400. Interference Control - The generation of radio interference and the vulnerabi 1
27、i ty to radio interference for the equi pent specified in 3,5,1 through 3.5.7 shall be controlled within the limits of Specification MIL-1-6181, except as follows: of Military Specification MIL-1-6181 in 4.3,4.1.2, Audio Frequency Conducted, shall be reduced to 0.3 volt at the system locaT oscillato
28、r frequency of 12 $3 kHz. (1) The 3.0 volt mis signal level listed under Test Methods 1 imi MIL- (2) The broadband and pulse (cw) conducted interference 105 dB above one microampere ts using current probe measured by the methods of Military Specification 1-6181 shall not exceed the limits of straigh
29、t-line curves plotted on semi-log paper between the following points: per t4Hz at 0.15 MHz; 73 dB above one microampere per MHz at 0.60 MHz; and 55 dB above one microampere per MHz at 25.0 MHz. (3) The narrowband (cw) radi ated and conducted interference limits measured by the methods of MIL-1-6181
30、shall not exceed the limits indicated by the following table at the system clock frequency (7.6 MHz) and associated harmonics. Maximum All owable Level Above MIL-1-61 81 Limits , Frequency (MH4 Radiated (dB) Conducted LSN (dB) Current Probe (dB) 7.6 30 18 37 15.0 17 12 23 23.0 16 15 16 30.0 20 45 ,O
31、 8 60.0 12 75 .O 16 90.0 10 105,O 5 152 .O 6 167,O 4 6 Licensed by Information Handling ServicesMIL-D-1873 58 m 7777706 0172170 1 m MIL-D-81873(AS) (4) The peak power output requirements listed under test methods of MIL-1-6181 in 4.3.3.2 are not applicable to the equipment defined by this specificat
32、ion. (5) The intermodulation requirements listed under test methods of MIL-1-6181 in 4.3.4.4 are not applicable to the equipment de- fined by this specification. 3.3.7 Provisions for Maintainability - The maintainability program, built-in test features, construction and packaging, provisions for tes
33、t points, and other maintainabi 1 i ty parameters for he equipments specified in 3.5.1 through 3.5.7 shall be as specified in Specification AR-10, except as modified herein. II c Modifications to AR-10 shall be as follws: (1) Automatic Initiation (,Ref ,3.3.1.11 of AR-.lO). An on- demand manual ly a
34、ctivated tes t mode of operation s ha1 1 be empl oyed. (2) Remote Initiation (Ref 3.3.1.1,3 of RR-10). This re- quirement is not applicable. (3) Equipment Status Indication (Ref 3.3.1.2 of AR-10). This requirement is not applicable. (4) Failure Location Function (Ref 3.3.2 of AR-10). The failure loc
35、ation function shall be automatic in those circuits havinci fixed - defi nable parameters , such as power supply vol tage, timi ng intervals , tri g- ger levels, and transmitter output levels. shall be such as to obviate the need for auxiliary test devices for the performance of organizational maint
36、enance. Failure Location Indicators (Ref 3.3.2.2 of AR-10). This requirement is not applicable. Built-In Test (BIT) Dependability (Ref 3.3.3 of AR-10). The BIT features shall be such that at least 90 percent of the equipment fail- ures shall be detected. At least 90 percent of the detected failures
37、shall be located to the faulty WRA. At least 90 percent of the failure indications shall result from equipment failures (performance below acceptable levels). The Receiver and indicator shall be considered as a single WRA for purposes of this requirement. (7) Non-Ambiguity (N-A) Ratio (Ref 3.4.2.2 o
38、f AR-10). The N-A ratio shall not be less than 0.9. (8) Quick Replaceable Assembly (QRA) Ratio (Ref 3.4.3.1 of AR-10). indicator, 0.5 for the transmitter, 0.4 for the reeling machine control unit, and 0.4 for the remote indicator. Shop test points for intermediate maintenance will not be brought to
39、the sur- face of the NRA. This built-in failure location (5) (6) The QRA ratio shall not be less than 0.9 for the receiver, 0.8 for the (9) Functional Test Point Arrangement (Ref 3.5.2 of AR-10). 7 Licensed by Information Handling Services(10) Shop Non-Ambiguity (SN-A) Ratio (Ref 4.3.2.2 of AR-10).
40、If the equipment is required to be compatible with the AN/USM-247 Versatile Avionic Shop Test System (VAST) the SN-A ratio shall be demonstrated as re- quiEd by AR-8 and AR-9, when specified in the contract. 3.3.7.1 Compati bi 1 i ty with VAST - The equipment s ha1 1 be compati ble with the Versatil
41、e Avionics Test S.vstem (VAST) and shall meet the requirements of Specification AR-8. When required by contract VAST Operational Test Program Sets shall be furnished in accordance with Specification AR-9. VAST Test Program Sets exist for the equipment, and changes to the equipment are made which wil
42、l affect the fault diagnosis procedure, changes to the exist- ing Test Program Sets shall be prepared as part of the equipment changes in ac- cordance with Specification AR-9. The requi rements of AR-8, Tes t Points (para 3.2) shall be met by isolating a fault to the level of a Functional Group of B
43、oards, such as an 1.F. Amplifier/AGC, Timing Assy, etc. Nomencl ature and seri al number assignment, namepl ate approval and i denti fi- cation marking shall be in accordance with Specification MIL-N-18307. to establish norma? performance characteristics under standard conditions and for making 1 ab
44、oratory bench tests . If Operational 3.3.8 Nomenclature, Namepl ates, and Identificati on Marking - 3.3.9 Standard Conditions - The following conditions shall be used Temperature Room ambient (25OC +lOC) Al ti tude Normal ground Vi brati on None Humi di ty Room ambient re1 ative hum Input power vol
45、tage 115 il .O Vac 27.5-LO.5 Vd up to 90% di ty 400 Hz 3.3.10 Service, Conditions - The equipment shall operate satisfac- torily under any of the environmental service conditions or reasonable com- bination of these conditions as specified in Specification MIL-E-5400 for Class IA equipment, except a
46、s modified herein. Jibration - The equipment shall operate satisfactorily when subjected to the vibration requirements of Curves II and III of Specification MIL-E-5400, except that -the console control panel shall meet Curve III. qui renients of Class IA equi vent except that the extreme operating t
47、emperature limits shall be -30 degrees C to t55 degrees C. 3.3.10.1 3.3.10.2 Temperature - The equipment shall meet the temperature re- 3.3.10.2.1 Overtemperature Shutoff - Overtemperature protection ci r- cuits shall be provided for the Azimuth-Range Indicator and the Transmitter Units which chal 1
48、 interrupt input power under conditions of excessive ambient temperature or reduced internal airflow at elevated temperatures. shall be manually resettable when the temperature returns to a safe operating level . The power 8 Licensed by Information Handling ServicesMIL-D-81873 58 m 777790b 0172L72 5
49、 9 MIL-D-81873 (AS) 3.3.10.3 Altitude - The equipment shall meet the altitude require- ments of Class IA equipment except that the maximum operating altitude shall be 15,000 feet. 3.3.1 1 Warmup Time - The time required for the equipment to warm up prior to operation shall be kept to a minimum and shall not exceed two minutes under s tandard conditions and three minutes at extreme service conditions. 3.3.12 Input Electrical Power - Input power apclies to all ments of the AN/AQS-l3B. equip- 3.3.12.1 Operating Power - The equipment shall meet all appl cable requirements of MIL-
