1、MIL-D-70443 (1) 12 9999906 1164821 365 M I t O I INCH POUND I MIL-D-70443 (AR) AMENDMENT 1 26 August 1992 MILITARY SPECIFICATION DISPLAY UNIT, SIGHT, HELICOPTER HEAD UP SUBSYSTEM: M76 This amendment forms a part of Military Specification MIL-D-70443 (AR), dated 30 November 1983, and is approved for
2、use by the U.S. Army Armament, Munitions and Chemical Command, and is available for use by all Departments and Agencies of the Department of Defense. PAGE 1 Bottom of page: Add the following distribution statement “Distribution Statement A. Approved for public release; distribution is unlimited.“ PA
3、GE 4 3.4.1.1: Delete and substitute “3.4.1.1 Electrical siqnal interface. interface with the signal processor shall I . II The HUD display unit be as defined in TABLE PAGE 5 3.4.1.3.2, First sentence: Delete “AN/PVS-5f1 and substitute “AN/PVS-5 or AN/AVS-6“. AMSC N/A 1 of 5 FSC 1270 DISTRIBUTION STA
4、TEMENT A. Approved for public release; distribution is unlimited. 0 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-D-70443 (1) 12 = 0b lLb4822 2TL m MIL-D-70443 (AR) AMENDMENT 1 3.4.1.2.1: Delete table portion found on page 5 in its entirety and
5、 substitute 0.10A O. 10A O. 55A PAGE 6 Delete paragraph number 3.4.2.2.2.2 and substitute “3.4.2.2.211. 3.4.2.2.2, line b: Delete “displayg1 and substitute I1disparity“. PAGE 7 3.4.2.2.3: Delete in its entirety and substitute “3.4.2.2.3: Optical Transmissibility. The individual combining glass plate
6、s shall have a minimum optical transmissibility of 75 percent required, over the FOV of the HUD . I . PAGE 8 Figure 1, at alternate eye position: Delete “STA 130.00“ and substitute “STA 122.00“. Figure 1, at A/C gUD mounting plane: substitute “27.55 REF“. Delete “27.5O REF“ and 2 Provided by IHSNot
7、for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-D-704g3 (3) 32 m 9997906 3364823 138 m MIL-D-70443 (AR) AMENDMENT 1 PAGE 10 Table I,ounder parameters of deflection X- : - + 10.5 deflgction (183.259 mr).“ diff = 5 10 deflection (174.533 mr).“. Table I, ugder paramet
8、ers of deflection Y- : = + 10.5 deglection (183.259 mr).“ and substitute 1OV diff = 2 10 deflection (174.533 mr).“. Delete “+ 1OV diff = and substitute Il+ - TOV Delete t*, 1OV diff PAGE 11 3.4.2.3.3.3: Delete paragraph in its entirety and substitute: setting, the average line brightness of symbols
9、shall not vary more than 40 percent over the FOV of the HUD. variation is defined as follows: “3.4.2.3.3.3 Briqhtness uniformity. For a given brightness Brightness B variation = Bmax - Bmin Bmax + Bmin Where: Bmax = maximum symbol line brightness Bmin = minimum symbol line brightness“. PAGE 12 3.4.2
10、.5.5: Delete 8nAN/PVS-51g and substitute I1AN/PVS-5 or a AN/AVS- 6 I . PAGE 13 3.4.2.6.4: Delete “AN/PVS-5“ and substitute “AN/PVS-5 or AN/AVS-6 I 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-D-70443 (1) 12 m 9999906 11611824 O74 m MIL-D-704
11、43 (AR) AMENDMENT 1 PAGE 14 3.4.3.3: Delete in its entirety and substitute “3.4.3.3 Panel liqhtinq. The instrument shall be provided with integral 28-volt blue-green lighting conforming to MIL-L- 85762. a. Coating. Reflection reducing coating shall be in accordance with MIL-C-14806. b. Reduced volta
12、qe operation. The lighting shall operate satisfactorily at reduced voltage. The relative brightness and color of the display shall be uniform and all markings shall be legible when the lighting is operated at 16.50 - + 0.02 Vdc and viewed from a distance of 28 to 30 inches.“. PAGE 15 3.4.5.1.8: Dele
13、te in its entirety. PAGE 16 3.4.8.2, Electromaqnetic interference: Add “CE03 broadband limits shall be relaxed 23 dB between 1.5 and 5.5 MHz.“ PAGE 18 Table II, Line 9: Delete 9 Rain 3.4.5.1.8 4.6.3.9“. Table III, First line: Delete “101 Electrical signal interface 3.4.1.1 Appendix A“. PAGE 22 4.6.3
14、.9: Delete in its entirety. PAGE 23 Following 4.6.3.11: Add new paragraph “4.6.3.12 Electromaqnetic radiation. The subsystem shall be installed in laboratory test fixtures in a manner that will simulate actual service usage and tested to MIL-STD-461 for the requirements of 3.4.8.“ PAGE 24 Figure 2,
15、y-axis: Delete 180.36“ and substitute “0.036“. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I MIL-D-70443 (1) 12 W 9999906 LLb4825 TOO 9 MIL-D-70443 (AR) AMENDMENT 1 PAGE 26 Appendix A: Delete Appendix A in its entirety. PAGE 53 Appendix B, unde
16、r input voltage cycling, step c: Delete “100%“ and substitute “110%“. PAGE 55 Appendix B, Figure 6, at top of figure: Delete ilI “ +.84 and substitute +.92 - - +.77 PAGE 56 Note 3 : Delete in its entirety and substitute “Note 3 Equipment ON; input voltage (28 VDC) at loo%, 110%, and 90%, respectively, during 1/3 of the total time of heating period plus high temperature period; momentarily off between input voltage changes.“. Custodian : Army-AR Preparing activity: Army-AR (Project 1270-A094) 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
