1、MIL-N-27530 58 W 77777Ob 0357005 T /=-5P MIL-N-29510(EC) 12 September 1986 MILITARY SPECIFICATION NAVIGATIONAL SET, AN/URN-25, TACAN This specification is approved for use by the Space and Naval Warfare Systems Command, Uepartment of the Navy, and is available for use by all Departments and Agencies
2、 of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the requirements and tests for production of a Tactical Air Navigation (TACAN) all-band transponder, Navigational Set, AN/URN-25, hereinafter referred 63 as the navigational set, for use in conjunction with a TACAN antenna
3、group to provide navigational i n f ormat i on to ai rc ra f t. 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications, standards, and handbooks. The following specifications, standards, and handbook, fom a part of this specification to the extent specified herein. specified, the iss
4、ues of these documents shall be those listed in the issue of the Department of Defense Index of Specifications and Standards (DODISSI and supplement thereto, cited in the solicitation. Unless otherwise SPECIFICATIONS MIL ITARY MIL-E-16400 MIL-E-17555 MIL-M-38510 STANDARDS MILITARY Electronic, Interi
5、or Communication And Navigatidn Equipment, Naval Ship And Shore: General Specification For Electronic And Electrical Equipment, Accessories, And Provisioned Items (Repair Parts): Microcircuits, General Specification For Packaging Of MIL-STD-109 MIL-STD-454 MIL-STD-461 MIL-STO-462 MIL-STD-471 MIL-STD
6、-740 MIL-STD-781 MIL-STD-810 MIL-STD-965 MIL-STD-1310 MIL-STD-1364 MIL-STD-1387 DoD-STD-1399, MIL-STD-1472 Section 300 Qual i ty Assurance Terms And Definitions Standard General Requirements For Electronic Equipment Electromagnetic Emission And Susceptibility Requirements For The Control Of Electrom
7、agnetic Interference Electromagnetic Interference Characteristics, Measurement Of Maintai nabi 1 i ty Verification/Demonstration/Eval uation Airborne And Structureborne Noise Measurements And Acceptance Criteria Of Shipboard Equipment Reliability Design Qualification And Production Tests: Exponentia
8、l Distri bution Environmental Test Methods And Engineering Guide1 ines Parts Control Program Shipboard Bonding, Grounding, And Other Techniques For Electromagnetic Compatibility Standard General Purpose Electronic Test Equipment Procedures For Submission Of Application For Approval Of Non-Standard G
9、eneral Purpose Electronic Test Equipment Interface Standard For Shipboard Systems, Electric Power, Alternating Current (Metric) Human Engineering Design Criteria For Military Systems,. Equipment And Facilities Beneficial comments (recommendations, additions, deletions) and any pertinent data which m
10、ay be of use in improving this document should be addressed to: Commander, Space and Naval Warfare Systems Command (SPAWAR-003-121), Washington, DC 20363-5100, by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document, or by letter
11、. AMSC N/A FSC 5825 Approved for public release; distribution is unlimited. DISTKIBUTION STATEMENT A. THIS DOCUMENT CONTAINS PAGES: Licensed by Information Handling ServicesProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-N-29510 58 = 9999906 O15
12、700b 1 U MS3114 MIL-N-29510( EC) Connector, Receptacle, Electric, Series 1, Solder Type, Jam Nut Mounting, Bayonet Coupling HANDBOOK MILITARY MIL-HDBK-241 Design Guide For Electromagnetic Interference (EMI) Reduction In Power Supplies 2.1.2 Other Government publications. The following other Governme
13、nt publ ications 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 solicitation. PUBLICATIONS NAVAL MILITARY PERSONNEL COMMAND (NMPC) NAVPERS 18068 Navy Enlisted Manpower And Personnel Classifications
14、And Occupational Standards NAVAL AIR SYSTEMS COMMAND (NAVAIR) WS-6536E with SCN 1 Process Specification Procedures And Requirements For Preparation And Soldering Of Electrical Connections (Copies of specifications, standards, handbooks, and publications required by contractors in connection with spe
15、cific acquisition functions should be obtained from the contracting activity or as directed by the contracting officer. 1 extent specified herein. Unless otherwise specified, the issues of the documents which are DoD adopted shall be those listed in the issue of the DoDISS specified in the solicitat
16、ion. Unless otherwise specified, the issues of documents not listed in the DoDISS shall be the issue of the nongovernment documents which is current on the date of the solicitation. 2.2 Other publications. The following document forms a part of this Specification to the ELECTRONIC INDUSTRIES ASSOCIA
17、TION (EIA) EIA RS-310-C-77 2001 Eye Street, NW, Washington, DC 20006.) which prepare or which distribute the documents. These documents also may be available in or through 1 ibraries or other informational services. Racks, Panels And Associated Equipment (Application for copies should be addressed t
18、o Electronic Industries Association, (Nongovernment standards and other publ ications are normally available from the organizations 2.3 Order of precedence. and the references cited herTe sheets, or MS standards), the specification, however, shall exemption has been obtained. 3. REQUIREMENTS In the
19、event of a conflict between the text of this specification n (except for associated detail specifications, specification text of this specification shall take precedence. Nothing in this supersede applicable laws and regulations unless a specific 3.1 General. The navigational set shal specified=. 3.
20、1.1 First article. When specified in subjected to first article inspection (see 4 be in accordance with MIL-E-16400, to the extent the contract or purchase order, a sample shall be 3 and 6.3). 3.2 Navigational set description. The navigational set shall consist of a beacon cabinet and a control-indi
21、cator unit (see 6.4.4) suitable for ship or shore installation. The navigational set shall provide 100 properly equipped aircraft with range, bearing, and identification information within a 321.8 kilometer (km) (200 mile (mi) line-of-sight range. The navigational set shall have a 252 channel capabi
22、lity and require a maximum of 3 minutes to change from any channel to any other channel without external test equipment or internal adjustments. Vacuum tubes shall not be used except for the last two radio frequency (RF) power stages. 2 Provided by IHSNot for ResaleNo reproduction or networking perm
23、itted without license from IHS-,-,-MIL-N-27530 5 W 977790b 0357007 3 W MIL-N-29510( EC) 3.2.1 Major components. The beacon shall consist of the major components specified in a and b, enclosed in one cabinet: a. Coder-keyer b. Receiver-transmitter 3.2.1.1 Major functions. The functions specified in a
24、 through d shall be contained in separate drawers or contained within the major components of the beacon cabinet: a. Monitoring circuitry (see 3.3.3) b. Control-interface circuitry c. Blowers (if required) d. Secondary power supplies 3.2.1.2 Control -indicator. The control-indicator shall provide re
25、mote control operation and report beacon status. 3.3 Specific performance requirements. Specific performance requirements shall be as specified in 3.3.1 through 3.3.1.2.3. 3.3.1 Coder-keyer. The coder-keyer shall provide the composite video pulse train to the 3.3.1.1 Coder. The coder shall develop t
26、he main and auxiliary reference groups, identity recei ver-transmi tter. signal, establpriority between reference groups, identity, random, and distance reply pul ses and provide pulse pair coding. The 15-hertz (Hz) reference group is called the main reference group. pulses, and the spacing between
27、pairs shall be 30 *0.3 microseconds (cis). main reference group shall consist of a group of 13 single pulses spaced 30 I0.3 ps apart. 3.3.1.1.2 Auxiliary reference pulse group. The 135-Hz reference group is called the auxiliary reference group. For X-channels, the auxiliary reference group shall con
28、sist of six pairs of pulses, and the spacing between pairs shall be 24 S0.25 ps. For Y-channels, the auxiliary reference group shall consist of a group of 13 single pulses spaced 15 *0,2 ps apart. 3.3.1.1.3 Precedence. Reference groups shall have priority over all other portions of the output signal
29、. Identity pulses shall have priority over all but reference groups. Distance reply pul ses shall have priority over random pul ses only. 3.3.1.1.4 Pulse codin . which shall bed For Y-channels, the spacing shall be 30 *0.25 us. Delay compensation in the X-channel timing will be accomplished in the a
30、ntenna group. beacon from the antenna group shall properly operate the burst development circuits. characteristics are: Amplitude of +7.0 11.5 volts (VI and -7.0 *1.5 V measured across 10 kilohms shunted by 0.005 microfarad. These loads shall be incorporated into the transponder. The triggers positi
31、ve excursion occurs first and each half alternation has a length of 115 *10 ps. The decay time of the positive to negative crossover does not exceed 2 ps. trailing edges of the rise and fall of the pulse are approximately 30 WS as shown in FIGURE 1. 3.3.1.1.6 Pretri er. A pretrigger output from the
32、beacon shall be provided. The pretrigger output shall be -7%- aval a e at a receptacle located on the cable entrance box. 3.3.1.1.6.1 Pretrigger characteristics. The pretrigger shall have a lead time of 3.0 ps to 10 ps, measured to the 10 percent point on the. rise of the transmitter pulse pair, wit
33、h a stability of I0.25 ps. width between 2.0 ps and 20 MS. The output impedance shall be 125 ohms. The rise time shall be less than 100 nanoseconds as measured at the end of 30.48 meter (m) (100 feet (ft) of RG-58/U coaxial cable. 3.3.1.1.1 Main reference pulse group. For X-channels, the main refere
34、nce group shall consist of a group of 12 pairs of For Y-channels, the For X-channels, the pulses shall be coded in pairs with a spacing 3.3.1.1.5 Antenna timing triggers. The main and auxiliary timing triggers provided to the Their The leading and The pretrigger amplitude shall be between +5 V and +
35、50 Y, with a pulse- 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.3.1.2 Keyer. A solid-state electronic keyer capable of keying the transmitter by setting three lettered switches, one numbered switch, and a control switch to select normal, cont
36、inuous or no tone, shall be provided. by-passed and the last digit of the keyer control shall be numerical. In the event of antenna shutdown, the 1350-Hz oscillator shall continue to operate within the frequency tolerance of the phase-locked operation. The lettered and numbered switch modules shall
37、be capable of being The keyer controls chal 1 be inside the appropriate drawer. ir t7.O 11.5V - I/ -7.0 I1.5V II FIGURE 1. Trigger pulse shape. 3.3.1.2.1 Identification signal. The identification signal shall consist of a series of paired pulses spaced as specified in 3.3.1.1.4, transmitted at a rep
38、etition rate of 1350 pulse pairs per second (s) and phase-locked to the 135-Hz antenna trigger so that the first pulse of an identity pair shall occur 740 *50 ps after the first pulse of the preceeding reference group. 3.3.1.2.2 Equalizing pulse pair. An equalizing pair of pulses shall be transmitte
39、d 100 I10 ps after each identity pair. 3.3.1.2.3 Identification cycle. The random and distance reply pulses shall be replaced by the identity pulses at a recurrence rate of once every 30 s *10 percent. During identity, the beacon code shall be transmitted as dots and dashes (Morse) of identity pulse
40、s, the spaces between dots and dashes being occupied by distance reply and random pulses. The dots and spaces between dots and dashes shall be between 100 milliseconds (ms) and 125 ms. Dashes and spaces between alphanumeric characters shall be between 300 ms and 375 ms. The receiver shall contain, a
41、s a minimum, the pre-selector, mixer, RF amplifiers, detector, and first video amplifier. The transmitter shall contain, as a minimum, the RF frequency source, RF amp1 ifiers, associated modulators, and monitoring and contro circuitry. Low, medium, and high power levels shall be available as specifi
42、ed herein. 3.3.2 Receiver-transmitter. 3.3.2.1 Receiver. The receiver shall be of a sensitive superheterodyne type, a passive transmit-receive switch, .a decoder designed to process distance interrogation pul ses, and a noise generator to maintain a constant output during conditions of less than ful
43、l interrogation load. The receiver shall use a continuous wave (CW) output from the transmitter frequency source for local oscillator power. A YIG type pre-selection controlled by the transmitter channel select switches shall be used. A cingle log intermediate frequency (IF) is desired, as is single
44、 IF conversion. otherwise speci fled herein. Receiver performance requirements shall be considered as beacon requirements unless 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-N-27530 58 777770b 0357007 7 W 3.3.2.1.1 Fre uenc . 3.3.2.1.2 Trigg
45、ering level. The receiver shall be capable of being tuned to any one of the 126 l-megahertz7Tfl be provided to inhibit this alarm. Placing the normal/test switch (see 3.3.5.3) in the test position shall also inhibit the alarm. An indicator displaying the monitor inhibit condition shall be provided o
46、n the transponder and on the control-indicator. Reply delay shall be wired as a hard failure. The alternating current (AC) line shall be wired as a hard failure, subject to the reset feature (see 3.3.6.1). 3.3.2.2.7.5 Frequency stability. The transmitted frequency shall be maintained within 3.3.2.2.
47、7.6 Duty cycle. The duty cycle shall conform to the requirements of continuous 3.3.3 Beacon monitoring. Monitoring circuitry shall, whenever practical, be installed 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I MIL-N-27510 58 777770b OL.57014 O
48、 3.3.3.2 Monitored parameters and tolerances. The parameters and tolerances shall be continuously and independently monitored as specified in TABLE II. 3.3.3.3 Monitor alarm indicators. All monitor alarm parameters shall be individually displayed on indicators that are vertically aligned on one side
49、 of cabinet panels and shall be prominently identified. Instantaneous failures shall be indicated by a l-s memory and failures exceeding alarm limits shall be held in memory until manually reset. Alarm failure time limits shall be held in memory until manually reset. 3.3.3.4 Monitor fail-safe. A monitor fail-safe function shall be provided that exercises each of the monitored parameters to verify its error detection capability. 3.3.4 Beacon meterin$. Significant voltages, curr
