NAVY MIL-I-22960 A-1987 RADAR INDICATORS FOR NAVAL SURFACE SHIPS SUBMARINES AND SHORE INSTALLATIONS《海军表层军舰 潜艇和海滨装置雷达指示器》.pdf

1、MILITARY SPECIFICATION RADAR INDICATORS FOR NAVAL SURFACE SUBMARINES AND SHORE INSTALLATIONS, SPECIFICATION FOR 1. SCOPE 2. APPLICABLE DOCUMENTS 2.1 Government documents. MIL-I -22960A(SH) 8 January 1987 SUPERSEDING NIL- 1-22960 (SHIPS) 23 November 1961 (See 6.6) SHIPS , GENERAL This specification i

2、s approved for use within the Naval Sea Systems Command, Department-oi the Navy, and is available for use by all Departments and Agencies of the Department of Defense. 1.1 Scope. This specification covers the general requirements and defini- tions applicable to the construction of radar indicators w

3、ith cathode ray tube (CRT) displays for Naval surface ships, submarines, and shore installations. These radar indicators are not an integral part of the radar transmitter-receiver system or a part of a weapons system. 1.2 Configuration. Radar indicators covered by this specification shall be for dis

4、playing radar echo signaIs from navigation, surface and air surveillance radar sets in a plan position indicator (PP)/range height indicator (RHI) presentation (see 6.3.4 and 6.3.5), by a scanning method as specified (see 6.2). 2.1.1 Specifications and standards. The following specifications and sta

5、ndards form a part of this specification to the extent specified herein. Unless otherwise specified, the issues of these documents shall be those listed in the issue of the Department of Defense Index of Specifications and Standards (DoDISS) and the supplement thereto, cited in the solicitation. SPE

6、CIFICATIONS MILITARY MIL-E-1 - Electron Tubes, General Specification for. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Naval Sea Systems Command, SEA 5523, Department of the Navy,

7、Washington, DC 20362-5101 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC N/A FSC 5840 DISTRIBUTION STATEMENT A Approved for public release; distribution unlimited THIS DOCUMENT CONTAINS /2 PAGES. 1 Pro

8、vided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I -22960ATSH) PIILITARY (Continued) NIL - I - 9 8 3 - Interior Communication Equipment, Naval Ship- MIL-E316400 - Electronic, Interior Communication and Navigation board; Basic Design Requirements for.

9、 Equipment, Naval Ship and Shore: General Specification for. - Electronic and Electrical Equipment, Accessories, and Provisioned Items (Repair Parts): Packaging of. MIL-D-8 7 15 7 - Display, Diode, Light Emitting, Solid State, General Specification for. MIL-E-17555 STANDARDS NILITARY MIL-STD-105 MIL

10、-STD-242 MIL - STD - 24 2 / 8 MIL-STD-415 MIL-STD-454 MIL-STD-751 MIL-STD-1311 MIL-STD-1348 DOD-STD-1399, Section 300 MIL-STD-1472 MIL-STD-1553 - Sampling Procedures and Tables for Inspection - Electronic Equipment Parts, Selected Standards. - Electronic Equipment Parts, Selected Standards, Connecto

11、rs. - Test Provisions For Electronic Systems and Associated Equipment, Design Criteria for. - Standard General Requirements For Electronic Equipment. - Radar Outputs, Naval Ship and Shore. - Test Methods for Electron Tubes. - Knobs, Control, Selection of. - Interface Standard For Shipboard Systems,

12、Electric Power, Alternating Current. (Metric) - Human Engineering Design Criteria For Military Systems, Equipment and Facilities. - Aircraft Internal Time Division Command/Response Multiplex Data Bus. by Attributes. 2.1.2 Other Government publications. The following other Government publications for

13、m 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 SEA SYSTEMS COMMAND (NAVSEA) TE-000-AB-GTP-010 NAVSEAINST 3900.28 - Reliability and Maintainability of the Naval Sea Syst

14、ems Command for Design, Development and Acquisition. - Electronic Parts Application Manual. NAVAL MATERIAL COMMAND (NAVMAT) 0518-LP-098-2000 - Navy Power Supply Reliability Design and Manufacturing Guidelines. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license fro

15、m IHS-,-,-MIL - I - 2 29 6 O A ( SH ) (Copies of specifications, standards, and publications required by contrac- tors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting activity.) 2.3 Order of precedence. In the event

16、 of a conflict between the text of this specification and the references cited herein (except for associated detail specifications, specification sheets or MS standards), the text of this specifica- tion shall take precedence. Nothing in this specification, however, shall supersede applicable laws a

17、nd regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Requirements. The radar indicator (see 6.3.6) shall be a two dimensional, intensity-modulated indicator to display the radar outputs from Navy surface ship, submarine or shore installation search radar sets. The radar

18、indicator shall be stand-alone and shall interface with external processors and controls (see 6.2). Where specified, the recommended interface is MIL-STD-1553. The radar indicator shall meet the requirements of MIL-E-16400. 3.2 Display requirements. 3.2.1 Display element. The display element for rad

19、ar indicators shall be a CRT. 3.2.2 CRT specification. CRTs shall be the militarized version and shall be constructed and tested in accordance with MIL-E-1. The CRT shall have, as a minimum, the following characteristics: The tube envelope size shall be as specified (see 6.2). Recommended PPI area s

20、hall be 10 inches in diameter for detection and tracking. The phosphor screen shall have a usable area as specified (6-2). The screen shall be a Joint Electron Devices Engineering Council registered aluminized phosphor. The CRT shall operate continuously within its high voltage rating on the anode,

21、without arc-over. The CRT shall be high voltage electrostatically focused. The electron beam shall be deflected by magnetic deflection. The line width shall be not less than the human eyes ability to resolve and shall be measured at the 50 percent point of intensity in both the horizontal and vertic

22、al direction at the maximum writing speed of operation (see 6.2). High voltage dynamic focus shall be used for uniform focusing in the specified equipment. A glass safety panel shall be bonded to the CRT faceplate for implosion protection. The outside surface of the bonded safety panel shall have a

23、high efficiency anti-reflection coating, which shall also be an electromagnetic shield when grounded in the indicator. The combination of the safety panel, bonding, CRT glass face- plate and anti-reflection coating shall maximize brightness and contrast for operating in a daylight environment withou

24、t use of a viewing hood. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-(1) Militarized shall mean that the CRT shall operate in the indicator during and after shock, vibration, and environmental testing Room temperature vulcanizing (RTV) and sila

25、stic compounds used to encapsulate the anode connection and the tube base leads shall be primed and cured for complete adherence to components and leads. changed in the indicator without disassembly of any connector or unsoldering of connectors. (m) (n) The CRT assembly shall be chosen so that the a

26、ssembly can be .I 3.2.3 Video system response. The CRT size, CRT line width, video amplifier and signal source sensor shall provide a total modulation transfer function (MTF) (see 6.3.3) system spurious response of 25 percent when the system is displaying radar returns consisting of pulses as short

27、as 50 nanoseconds duration and observed by the operator at a distance of 20 inches. 1 3.2.4 CRT phosphor, The phosphor for the CRT shall be selected for color, efficiency, life, and persistence. Phosphors shall be aluminized, Persistence shall be compatible with the scanning system. Resolution requi

28、rements shall be within the capability specified for the phosphor (see 6.2). 3.2,5 CRT X-ray threshold. The threshold generation of X-rays in CRTs shall be considered to be from an electron beam accelerated at or greater than 16 kilovolts (kV). When an accelerating voltage exceeding 16 kV is specifi

29、ed, X-ray suppression shall be in accordance with requirement 1 of MIL-STD-454. 3.2.6 Spot burn protection. CRT control circuits shall have a time delay circuit that prevents the premature application of high voltage to the anode and focus electrodes of the CRT. The time delay circuit shall be activ

30、ated whenever primary alternating current (ac) power to the indicator is initially turned on, and shall function and recycle whenever primary power to the indicator is interrupted for longer than the predetermined warm-up period. circuit shall not allow anode and focus voltage to be applied to the C

31、RT until the operational circuits of the indicator have stabilized during a predetermined warm-up time. The time delay circuit shall be interlocked with a deflection current sensing circuit. voltage from being applied to the CRT when the power off time is longer than the warm-up time and X and Y def

32、lection currents are not flowing in the deflection yoke. voltage to be applied to the CRT that shall cut off the electron beam at any time in the absence of deflection current, When the deflection currents are again present in the deflection yoke, anode and focus voltage shall be applied to the CRT.

33、 The time delay This circuit shall prevent the anode and focus The deflection current sensing circuit shall cause a bias 3.2.7 High voltage power supply protection. The high voltage power supply for the CRT anode and focus electrodes shall be protected from over current damage by a current limiting

34、circuit within the high voltage power supply (not a series limiting resistor). If a separate high voltage power supply is used for CRT dynamic focus, it shall be protected with a current limiting circuit. 3.2.8 High voltage power supply regulation. The high voltage power supply load regulation shall

35、 not exceed 0.05 percent at the rated CRT voltage and current. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-22960A 58 7979906 0353767 W MIL - I - 229 60A ( SI) 3.2.9 Magnetic shielding. Magnetic shielding for the CRT shall be provided to pre

36、vent the effect, on the CRT display, of external magnetic fields in accordance with requirement 60 of MIL-STD-454. 3.2.10 Critical fusion frequency. The radar display shall be refreshed at a frequency higher than the frequency at which the critical fusion frequency (CFF) or flicker (see 6.3.2) occur

37、s. using the following formula: The CFF shall be calculated fc = 12.57 loglo A + 34 where : fc = critical fusion frequency A = brightness of photopic highlights in display, footlamberts This formula is applicable for CRT displays with medium to fast phosphor decay. Refresh rate shall be greater than

38、 the CFF caluculated from the formula and adjusted upwards to a rate which is technically compatible with the requirements of the Navy and illumination of the operating environment. 3.3 Deflection circuitry. 3.3.1 Deflection. The electron beam of the CRT shall be magnetically deflected. A single fix

39、ed position, ruggedized, high precision, encapsulated, stator type yoke shall be used, The circuitry for the yoke driver transistors shall be so configured that matching yoke driver transistors are not required. The deflection yoke windings shall be critically dampened to the lowest deflection frequ

40、ency to prevent ringing in the display. accomplished at the yoke. yoke shall be as short as possible and completely shielded from extraneous fields to eliminate ringing and distortion in the trace. If the yoke is not encapsulated in the CRT assembly, the yoke shall be removable from the CRT with- ou

41、t disassembly of wiring and shall be connected to the deflection amplifier with a connector. Dampening shall be The wiring between the deflection amplifier and the 3.3.2 Luminance shades. The display system shall display to the operator brightness variations of the display equivalent to a minimum of

42、 eight luminous shades (see 6.3.7). 3.3.3 Contrast ratio. The contrast ratio of the display shall be at a minimum, equal to D = Cm, where: D = contrast ratio C = contrast change detected by human eye, (2)l“ m = number of contrast changes (luminous shades, see 3.3.2) Thus, at a minimum, a display wit

43、h eight luminous shades shall have a contrast ratio of 16 to one for a daylight environment. 3.3.4 Resolution requirement. MTF shall be used as the criteria for the resolution requirement for radar indicators. -The CRT display shall be configured and specified as having an.MTF of 50 percent. Provide

44、d by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.3.5 Video amplifier. The amplitude of the video signal from the radar set to the video input of the indicator shall be in accordance with MIL-STD-751. The CRT video amplifier shall have uniform frequency res

45、ponse within 0.5 decibel (dB) for a frequency range from direct current (dc) to the inverse of twice the rise time (t ) of the resolution points generated by the deflection system. The frequencyrresponse shall be measured with the CRT video amplifier connected to and driving the control element of t

46、he CRT display. The gain of the CRT video amplifier shall be sufficient to drive the CRT to zero bias with a 2 volt peak *amplitude video input signal and maintain uniform frequency response as specified herein for all gain settings. shall not have a sharp cut-off characteristic at the limit of the

47、uniform frequency response, but shall have a remote roll-off response. dc shall be provided to reference the control electrode of the CRT to a fixed dc bias voltage to maintain uniform black level. The frequency response Restoration to 3.3.6 Signal-to-noise ratio. The signal-to-noise ratio at the ou

48、tput of the video amplifier, when measured at the modulation electrode of the CRT, shall be greater than 35 dB. 3.3.7 Blanking. Blanking (see 6.3.1) of the video signal shall occur prior to display deflection retrace and continue past the active trace time before unblanking. 3.3.8 Analog video input

49、 signals. The radar indicator shall operate with analog video signals that are in accordance with MIL-STD-751. measured at the terminated video input connector of the indicator, the video signals shall be of positive polarity with a peak amplitude of 1 to 3 volts. When 3.3.8.1 Analog video input connectors. A coaxial cable connector recepta- cle selected in accordance with MIL-STD-242/8 shall be provided in the radar indicator to accommodate the incoming analog video. 3.3.9 Digital v