1、I -_ - L MIL-S-2885bA 58 m 777770b OL55b3L 3 W MI L-S-28856A( EC 1 6 August 1982 SUPERSEDING MIL-S-28856( EC) 19 December 1980 (See 6.4) MILITARY SPEC1 FICAT ION SYNCHRONIZER, VIDEO, SN-501/UPX This specification is approved for use by the Naval Electronic Systems Command, Depart- ment of the Navy,
2、and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the design, performance, test, manufacture, and acceptance requirements for the SN-501/UPX Vtdeo Synchronizer, hereinafter referred to as the equipment, for Air Traffi
3、c Control Radar Beacon System (ATCRBS) Identification, Friend or - Foe (IFF) Mark XI I System (AIMS). interrogators. 2. APPLICABLE DOCUMENTS 2.i Government documents. 2.1.1 Specifications, standards, and handbooks. Unless otherwise specified, the fol- lowing specifications, standards, and handbooks
4、of the issue listed in that issue of the Department of Defense Index of Specifications and Standards (DoDISS) specified in the solic- itation form a part of this specification to the extent specified herein. SPECIFICATIONS MILITARY MIL-E-16400 MIL-E-17555 MIL-T-28735 MIL-G-28744 MIL-C-39012 Electron
5、ic, Interi or Communication And Navigation Equipment, Naval Ship And Shore: General Specification For Electronic And Electrical Equipment, Accessories, And Repair Parts, Packaging And Packing Of Test Set, Radar, AM/UPM-137 Generator, AIMS Pretrigger, Connector, Coaxial, Radio Frequency; General Spec
6、ification For SG-841( )/UPX STANDARDS MILITARY MIL-STD-12 MIL-STD-105 MIL-STD-108 . Abbreviations For Use On Drawings, Specifications, Standards, And In Technical Documents Sampling Procedures And Tables For Inspection By Attributes Definition Of And Basic Requirement For Enclosures For Electric And
7、 Electronic Equipment Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Naval Electronic Systems Command (ELEX-8111), Washington, DC 20360, by using the self-addressed Standardization D
8、ocument Improvement Proposal (DD Form 1426) appearing at the end of this document, or by letter. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-HANDBOOK MILITARY - MIL-S-28856A 58 W 9799906 0155632 5 m MIL-S-28856A( EC) I MIL-STD-109 MIL-STD-275 MIL
9、-STD-415 MIL-STD-461 MIL-STD-462 MIL-STD-471 MIL-STD-721 MIL-STD-781 MIL-STD-810 MIL-STD-965 MIL-STD-1364 DOD-STD-1399, Section 070-1 MIL-STD-1472 MS-3102 MIL-HDBK-241 Quality Assurance Terms And Definitions Printed Wiring For Electronic Equipment Test Provisions For Electronic Systems And Associate
10、d Equipment, Design Criteria For Electronic Emission And Susceptibi 1 ity Requirements For The Control Of Electromagnetic Interference Electromagnetic Interference Charac- teristics, Measurment Of Maintai nabi 1 i ty Demonstration Definitions Of Effectiveness Terms For Reliability, Maintainability,
11、Human Factors, And Safety Re1 i abi 1 ity Design Qual i fication And Production Acceptance Tests, Exponen- tial Distribution Envi ronmental Test Methods Parts Control Program Standard General Purpose Electronic Test Equipment Interface Standard For Shipboard Systems, Section 070-Part 1 D.C. Magnetic
12、 Field Envi ronment (Metric) Human Engineering Design Criteria For Mi 1 i tary Systems , Equipment And Faci 1 i ties Connector, Receptacle, Electric , Box Mount i ng Design Guide For EM1 Reduction In Power Supplies (Copies of specifications, standards, and handbooks required by manufacturers in conn
13、ection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting officer.) specification and the references cited herein, the text of this specification shall take precedence. The following document forms a part of this specification to th
14、e extent specified herein. The issues of the documents which are indicated as DoD adopted shall be the issue listed in the current DoDISS and the supplement thereto, if appl i cab1 e. 2.1.2 Order of precedence. In the event of a conflict between the text of this 2.2 Other publications. NATIONAL FIRE
15、 PROTECTION ASSOCIATION (NFPA) NFPA 70-1978 National Electrical Code (Application for copies should be addressed to the National Fire Protection Association, (Industry association specifications and standards are generally available for reference 470 Atlantic Avenue, Boston, MA 02210.) from librarie
16、s. They are also distributed among technical groups and uslng Federal agencies.) 3. REQUIREMENTS i 3.1 General. The equipment is designated as shipboard equipment and shall be in accor- dance with MIL-E-16400, except as hereinafter specified. 2 Provided by IHSNot for ResaleNo reproduction or network
17、ing permitted without license from IHS-,-,-MIL-S-2885bA 58 MIL-S-28856A( EC) m 7. 3.1.1 First article. When specified, a sample shall be subjected to first article inspec- tion (see 4.3 and 6.3). 3.2 Design requirements. 3.2.1 General design. The equipment shall provide the time coordinating capabil
18、ity to permit operation of the interrogator either independently of radar synchronization (free-run- ning), or slaved to the radar synchronization. be satisfied by the design of the equipment. The first system (see FIGURE 1) is the operation of one interrogator with one radar system with the interro
19、gator either slaved to the radar pulse repetition frequency (PRF) or operating independently at some PRF other than that of the radar, The second system (see FIGURES 2 and 3) is the operation of one interrogator simultan- eously with two radar systems having different PRFs. To accomplish the second
20、system, it will be acceptable if the interrogator is slaved to one radar and thereby not slaved to the other. However, the equipment shall accept the PRF of the controlling (slaving) radar whether it is greater than, or less than, the other radar. without modification from the interrogators. these s
21、ignals as outputs shall not alter the signal characteristics of the inputs. polarity (see 0.3 ps to 20 ps pulsewidth with rise time up to 25 percent of the duration of 0.04 ps per V times the amplitude and fall time of up to 1 to 5 times the rise time; li5 V to 55 V amplitude. A 75-ohm termination s
22、hall be provided, This trigger shall be used as the external trigger source to produce the reference pulse train; Solderless links shall be provided to internally select either the delayed IFF trigger (see 3.2.16f) or the Radar A pseudo pre-trigger (see 3.2.17.2.2b). b. Auxiliarylinternal trigger ou
23、t. Twenty +5 V into 75-Ohm load with same pulse characteristics as specified in 3.2.16a. This is the bufTered output of the auxiliary input trigger or the internal trigger source selected by the trigger source switch. time and fall time; amplitude, 20 t5 V into a 75-ohm load. trigger generator funct
24、ion of the equipment, and shall be used for Mode 4 trigger in the independent mode operation. undelayed and counted down trigger. d. SIF trigger out. justable delay of 50s to 500s from Mode 4 trigger out. it shall be used as a SIF trigger to the interrogator. may be used as a delayed and counted dow
25、n trigger. e. Display trigger out. 3.2.16d. In the auxiliary trigger operation, it may be used as a delayed trigger. c. Mode 4 trigger out. Positive pulse, 10.5 ps width; 0.02 us to 0.1 pis rise In theauxiliary trigger operation, it may be used as a buffered This trigger is derived from the Same pul
26、se characteristics as specified in 3.2.16c, but ad- In the independent mode operation, In the auxiliary trigger operation, it Same pulse and delay characteristics as specified in In the independent mode operation, this trigger may be used as zero or display trigger. f. IFF trigger in. Positive pulse
27、 0.3 YS to 5.0 ps pulsewidth; 0.02 ps to 0.1 ps rise and fall time; amplitude, 1.5 v to 55 V. A 75-ohm termination shall be provided. When used, this trigger normally comes from the interrogator or another equipment to initiate the storage (write) cycle. An adjustable O ,s to 100 shall be provided b
28、efore this trigger is routed to the timing and control function for initia- ting the storage cycle or to the auxiliary trigger input (see 3.2.16a). delay (with delay jitter less than tO.1 ps) 17 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-2
29、8856A 58 = 7797706 03556118 7 MIL-S-28856A( EC) g. IFF trigger out. Same characteristics as specified in 3.2.16. This buffered trigger shall be used to provide the same storage cycle timing when another equipment is used. Solderless links shall be provided to select either the external IFF input tri
30、gger (delayed or undelayed) (see 3.2.16f) or the timing and control function trigger that initiates the storage cycle (see 3.2.17.1.1d). h. Radar A pre-trigger in. Same characteristics as specified in 3.2.16a. A 75-ohm termination shall be provided. A and is used to initiate the recall (read) cycle
31、of stored IFF video and mode tags in the equipment . This signal comes from the independently triggered Radar i. Radar A pre-trigger out. Same characteristics as specified in 3.2.16h. This j. Radar A EOS trigger in. Same characteristics as specified in 3.2.16a. A is the buffered output of the Radar
32、A input trigger. 75-ohm termination shall be provided. output from storage. is a buffered output of the Radar A EOS input trigger. termination shall be provided. interrogator and shall be used to terminate the IFF video output from the video gating function. trigger is a buffered output of the Radar
33、 B input trigger. provided. equipment, 75-ohm load. Radar A trigger. load. shall be provided. the equipment. This Is retimed mode tags read-out of storage which is time-synchronized to Radar A trigger. 1s the buffered mode tags signal from interrogator. phase. When used, this trigger shall terminate
34、 the IFF video k. Radar A EOS trigger out. Same characteristics as specified in 3.2.16j. This 1. Radar B trigger in. Same characteristics as specified in 3.2.16a. A 75-ohm These pulses come from the slaving radar that is triggering the m. Radar B trigger out. Same characteristics as specified in 3.2
35、.16.1. This n. IFF video in. Positive 1.5 V to 3 V amplitude. A 75-ohm termination shall be This signal comes from the interrogator and shall be read into the storage of the Retimed video out. Positive pulses adjustable 1.5 V to 3 V terminated into o. This is the retimed video read-out of storage wh
36、ich is time-synchronized to p. q. Gated IFF video out. Mode tags in. Positive adjustable 1.5 V to 3 V terminated into 75-ohm This is the input IFF video gated to be range compatible with Radar B target video. Positive pulse train 2 V to 20 V amplitude. A 75-ohm termination This signal comes from the
37、 interrogator and shall be read into storage in r. Retimed mode tags out. Positive pulses adjustable 2 V to 20 V into 75-ohm load. S. Mode tags out. Positive pulses adjustable 2 V to 20 V into 75-ohm load. This t. 115 VAC in. 115 VtlO percent, 57 Hz to 63 Hz and 360 Hz to 440 Hz single- u. Selectabl
38、e trigger out. .Positive pulses 20 +5 V into a 75-Ohm load, and a 0.02 US to 0.1 PS rise time and fall time. The pulse repetition rate and width shall be that of the selected trigger. 3.2.16.1 removable at the rear panel connector. Unsoldering is an acceptable method of removal of the terminations.
39、Input termination. All input terminations shall be electrically and physically 3.2.16.2 Direct current (DC) isolation. The video signal inputs shall be capacitively coupled to ensure proper system operation with signals which have a DC reference other than ground. 9 3.2.16.3 Output reference level.
40、Except as hereinafter specified, the video signal Out- Puts of all eqU-cordance with this specification shall be referenced to ground -0.1 V +0.2 v. 18 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-256A 5B = 7797706 0355647 O MIL-S-28856A( EC
41、) , 3.2.16.4 Input and output protection. All trigger and video outputs specified in 3.2.15.1 and 3.2.15.2 shall withstand either a continuous and intermittent open circuit condition or a continuous and intermittent short circuit condition without any damage to the internal circuit of the equipment.
42、 3.2.16.5 Input thresholding. A fixed input threshold shall be provided for all input triggers and video input signals (IFF and mode tags) such that trigger and video input signals below the level of 1.2 V shall not be processed by the equipment. ments of the equipment. FIGURE 9 is provided as a gui
43、de to show the interrelationship of the requi red functional capabi 1 i ti es. 3.2.17.1 Trigger generator. The trigger generator function shall provide the necessary timing triggers for the equipment and the interrogator. It shall be possible for the trigger generator to operate independently (f ree
44、-runni ng) or sl aved to an external incoming auxi 1 i ary trigger. selection of the trigger generator function. Independent mode operation. mode, the trigger generator shall provide reference pulses with a PRF that is adjustable inter- nally from 100 pps to 410 pps in one pps increments. Provisions
45、 (via solderless link settings) shall be made to extend PRF range to 1000 pps in one pps increments. pulses the following delayed triggers (with delay jitter less than 0.1 vs), adjustable in increments less than 1.3 us shall be provided: a. Mode 4 triggers shall have the same PRF as the referenced p
46、ulses and zero delay (nominal). b. SIF triggers shall have the same PRF as the reference pulses; and via a single adjustment con- trol, these SIF triggers shall have identical delays that are adjustable from 50 PS to 500 ;is from the reference pulses. c. Two separately buffered display triggers to t
47、he output connectors. two display triggers shall have the same PRF as the reference pulses and two separately adjustable delays that are internally adjustable from 50 vis to 500 vs from the reference pulses. The adjustable delays of the two delayed triggers shall be independent of the delay of the S
48、IF trigger specified in 3.2.17.1.1b. d. An internal IFF trigger to the timing and control function of the equip- ment. This trigger to the timing and control function shall have the same PRF as the reference pulses and a delay that is internally and independently adjustable from 50 us to 500 vs from
49、 the reference pulses. This trigger is used by the timing and control to initiate the write command to the digital storage unit of the equipment. 3.2.17 Functional capabilities. The functional capabilities specified herein are require- An independent-auxiliary trigger source switch shall provide the trigger source 3.2.17.1.1 When the equipment is operating in the independent From these reference Two separately buffered Mode 4 triggers to the output connectors. Two separately buffered SIF triggers
