1、i -. i MIL-R-2722bA 5 9 77777Ob 0354074 7 MIL-R-2722 GA (USA FI 15 November 1967 SUPERSEDING MIL -R -2 722 6 (USA F) 23 July 1959 MILITARY SPECIFICATION RECEIVING SET, RADIO AN/ARN-67 1. SCOPE 1.1 designated Receiving Set, Radio AN/ARN-67. This specification covers the requirements for one type of g
2、lide scope receiver, 2. APPLICABLE DOCUMENTS 2.1 The following documents, of the issue in effect on date of invitation for bids or request for proposal, form a part of this specification to the extent specified herein. SPECIFICATIONS Military MIL-C -1 72 MIL-(3-3098 MIL-R-4146 MIL-E-5400 MIL-T-5422
3、MIL -A - 6325 MIL-R-9486 MIL -I -2 5 3 5 5 MIL-H-27848 MIL-H-27894 STANDARDS Military MIL-STD-470 MIL-STD-471 MIL-STD-704 MIL-STD -785 Cases; Bases, Mounting; and Mounts, Vibration (For Use With Electronic Equipment in Aircraft) Crystal Units, Quartz, General Specification For Radio Transmitting Set
4、 AN/MRN-8 Electronic Equipment, Aircraft, General Specification For Testing, Environmental Aircraft Electronic Equipment Antenna, Glide Path Radio Receiving Equipment, General Speci- fication For Design Of Receiving Set, Radio AN/ARN-31 Indicator, Low Approach ID-525/ARN Horizontal Situation Indicat
5、or AQU-4/A Human Engineering Requirements For Aerospace Systems And Equipment Maintainability Program Requirements (For S y s t e m s and Equipment s) Maintainability Demonstration Electric Power, Aircraft, Characteristics and Utilisation of Requirements for Reliability Program (System and Equipment
6、) PSC 5826 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- _. MIL-R-27226A 58 W 7797706 0354075 O a I MIL-STD-803 Human Engineering Design Criteria For Aerospace Systems MIL-STD-826 Electromagnetic Interference T e s t Requirements and T e s t MI L-
7、STD -831 DMWING U.S. Air Force 54324306 Installation Information, Receiver, Radio R-626/ARN-31 and Power Supply PP-ll7O/ARN-31 on Mounting MT-1454/ARN-31 and Equipment Methods Test Reports, Preparation Of (Copies of documents required by contractors in connection with specific procurement functions
8、should be obtained from the procuring activity or as directed by the con- tracting officer.) 3. REQUIREMENTS 3.1 Preproduction. This specification makes provisions for preproduction testing, 3.2 Units. The Receiving Set, Radio AN/ARN-67 shall consist of: Item Nr Quantity Description 1 1 Amplifier Mo
9、dule, Intermediate Frequency AM-2193/ARN 2 1 Mixer-Oscillator Module, Radio Frequency CV-785B/ARN 3 1 Filter Module, Band Pass F-423/ARN 4 1 Chassis, Radio Receiving Set MX-2756/ARN-67 5 1 Case, Radio Receiving Set CY-2624/ARN-67 3.3 General specification. The requirements of MIL-E-5400 shall apply
10、as require- ments of this specification with additions or exceptions to the paragraphs of MIL-E- 5400, as identified by similarity of paragraph headings, called out herein. When the two documents conflict, this specification shall govern. 3.3.1 Classification. The Receiving Set, Radio AN/ARN-67 shal
11、l be class 2 as defined in MIL-E-5400 with exceptions as specified herein. 3.3.2 Materials, parts, and processes 3.3.2.1 Approval of nonstandard parts and materials. Contract requirements for nonstandard parts and materials approval shall be category III as defined in MIL-E- 5400. . - 2- t Provided
12、by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-2722bA 5 W 99999Ob OL5L109b 2 W MIL-R-27226A(UAF) 3.3.2.2 Electrical Connectors -. 3.3.2.2.1 Receiver connector. The receiving set shall be provided with amain connector, Cannon Electric Company type DC-37
13、P, or equal, on the rear of the case that shall provide all electrical connections, except radio frequency, and shall mate with connector, Cannon Electric Company type DC-37SS or equal, on the mounting. Pin functions shall be as follows: Connector Pin No, Function 1 Ground . 2 Not required 3 Not req
14、uired 4 Not required 5 Spare 6 334.4-A, 334.7-B 7 335.0-A, 334.1-B 8 329.6-A, 329.9-B 9 330.2-A, 330.5-B 10 330.8-A, 329.3-B 11 331.4-A, 331.7-B 12 332. O-A, 332.3-B 13 332.6-A, 332.9-B 14 333.2-A, 333.5-B 15 333.8-A, 331.1-B 16 +27.5V dc 17 Not required 18 Not required 19 Not required 20 21 22 Flag
15、 - 23 Flag + 24 Power relay 25 Spare 26 Spare 27 Spare 28 Spare 29 Spare 31 Spare 32 Spare 33 Spare Dev - 90 Hz 150 Hz Dev + 90 Hz 150 HZ 30 Spare 34 A-B relay 35 Bridged to pin 16 36 Not required 37 Not required Provided by IHSNot for ResaleNo reproduction or networking permitted without license fr
16、om IHS-,-,-I - MIL-R-2722bA 58 97779Ob 0159097 LI W MIL-R -2 722 6A( USAI?) I 3.3.2.2.2 Antenna input connector. UG-290/U connector on the front of the receiver case. The antenna input shall be made through a type 3.3.2.3 Finishes 3.3.2.3.1 Cases and front panels. the cockpit area shall have a black
17、 wrinkle finish. Cases and front panels of equipment installed in 3.3.2.4 Meters (electrical indicating instruments) 3.3.2.4.1 A suitable elapsed time indicator, subject to the approval of the procuring activity, shall be provided on the front of the CY-2624/ARN-67 case to indicate accrued operation
18、 time of the equipment. Elapsed time indicator. 3.3.2.5 in this equipment. Electron tubes and semiconductor devices. Vacuum tubes shall not be used 3.3.3 Design and construction 3.3.3.1 All equipment units shall be designed to cool by free convection. If air vents are required, they shall be designe
19、d and protected as necessary to preclude entry of harmful foreign materials. 3.3.3.2 Interference. Electronic interference shall be controlled in the basic design of all units of the Receiving Set, Radio AN/ARN-67. The equipment shall also be designed to minimize susceptibility to interference from
20、external sources. Interference control requirements shall be in accordance with MIL-STD-826. Cooling. 3.3.3.3 Reliability, longevity, and maintainability 3.3.3.3.1 Reliability program. assurance program in accordance with MIL-STD -785. 3.3.3.3.2 Reliability and longevity. Reliability and longevity o
21、f the AN/ARN-67 receiving set shall be determined in accordance with MIL-STD-781. 3.3.3.3.2.1 MTBF. The minimum acceptable mean-time-between-failure (MTBF) of the receiving set shall be 600 hours. The contractor shall establish and conduct a reliability 3.3.3.3.2.2 Longevity. Longevity of the receiv
22、ing set shallbe no less than 3000 hours. 3.3.3.3.3 Maintainability 3.3.3.3.3.1 Maintainability program. The contractor shall establish a maintainability program plan in accordance with the requirements of MIL-STD-470. 3.3.3.3.3.2 Maintainability demonstration. Maintainability demonstration require-
23、ments shall be in accordance with MIL-STD-471. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- - MIL-R-2722bA 58 = 97797Ob 0354098 b MIL -R -2722 6A(USA F) 3.3.3.4 Service conditions (electrical). The receiving set shall be designated as a categor
24、y B (dc) utilization equipment in accordance with MIL-STD-704 with exceptions or additions specified herein. 3.3.3.4.1 as defined in MIL-STD-704. No performance shall be required under abnormal or emergency conditions 3.3.3.4.2 Power requirements. The electrical power required by the receiving set f
25、or the performance specified herein shall not exceed 975 milliamperes at a nominal 28V dc. 3.3.3.4.3 Power source transients. The transient conditions shall be as specified in MIL-STD-704. 3.3.3.5 Service conditions (environmental). Class 2 equipment requirements of MIL-E-5400 shall apply except as
26、specified herein. 3.3.3.5.1 Temperature-altitude combination. The equipment shall withstand exposure while operating at surrounding air temperature of +71“C at an altitude of 65,000 feet without causing permanent damage to the equipment. 3.3.3.5.1.1 Surroundiw air pressure. The air pressure surround
27、ing the equipment shall be assumed equal to free stream static pressure. The surrounding air pressure may vary at rates as high as 0.25 psia between 14.7 to 0.83 psia. The receiving set shall not require pressurization from the aiTcraft. ! 3.3.3.5.2 Vibration 3.3.3.5.2.1 Equipment normally mounted (
28、simulating aircraft installation). When normally mounted the equipment shall meet the requirement of this specification when subjected to 0.080 inch double amplitude until +0.41g is reached continuing 10.41g until 0.036 inch double amplitude is reached, continuing 0.036 inch double amplitude until i
29、4g is reached, and continuing i4g to 500 Hz. 3.3.3.5.2.2 Acceleration loads. All parts of the airplane will be subjected to steady state accelerations during flight, landing, takeoff and ground handling operations. The load factors developed in these conditions are shown below: a. b. c. Down acting
30、inertia load: 8.0g, to act alone Upward acting inertia load: 4.5g, to act alone Side inertia lo- .- 5 r - _- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I MIL-R-2722bA 58 = 9999906 0354099 B W MIL-R-2 7 722 6A(USAF) c 3.4.1 Chassis, Radio Receivi
31、ng Set MX-2756/ARN-67. The MX-2756/ARN-67 chassis shall be designed to contain all necessary connections and intermodular wiring plus common circuitry for the receiving set. The chassis shall provide proper mounting provisions for the three modules. 3.4.2 Case, Radio Receiving Set CY-2624/ARN-67. Th
32、e CY-2624/ARN-67 case shall enclose the receiving set and shall be constructed in accordance with MIL-C-172. When the case is closed, the receiving set shall be impervious to dust and rain, whether on or off its mounting. A suitable handle for removing and handling the receiving set shall be provide
33、d on the front of the case. A minimum clearance of 3/4-inch shall be allowed between the r-f coaxial antenna connector and the handle to permit the use of a Boonton type UG-88/U pad, or equal. 3.4.3 Mounting; MT-1454/ARN-31 or MT-1906/ARN-31. The receiving set shall be so designed that it will mount
34、 on Mounting MT-1454/ARN-31 or MT-l906/ARN-31 as specified in MIL-R-9486. Whenproperly mounted, the receiving set shall not exceed the sway space requirements of Drawing 54E24306. 3.4.4 Control requirements. The receiving set shall be so designed that selection of glide slope frequency and on-off co
35、ntrol can be remotely controlled by Control, Receiver C-1464/ARN-31, as specified in MIL-R-9486. The localizer-glide slope frequency pairings shall be in accordance with the following: Frequency Pairings Sequence Number Localizer 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 110.3 MHz 109.9 109
36、.5 110.1 109.7 109.3 109.1 110.9 110.7 110.5 108.1 108.3 108.5 108.7 108.9 111.1 111.3 111.5 111.7 111.9 Glide Slope One-for -One Two-for -One 335.0 MHz 333.8 332.6 334.4 333.2 332.0 331.4 330.8 330.2 329.6 334.7 334.1 329.9 330.5 329.3 331.7 332.3 332.9 333.5 331.1 335.0 MHz 333.8 332.6 334.4 333.2
37、 332.0 331.4 330.8 330.2 329.6 334.4 335.0 329.6 330.2 330.8 331.4 332.0 332.6 333.2 333.8 The selection of the proper glide slope frequency in accordance with these pairings shall be automatic. Ali equipments shall be wised for gcone-fori)ne9y pairing. Provided by IHSNot for ResaleNo reproduction o
38、r networking permitted without license from IHS-,-,-. MIL-R-2722bA 5B 77777Ob 0154100 O m MIL- R-2 72 2 6A (USA F) .r 3.4.5 Quartz crystal units. The r-f portions of the equipment shall be crystal con- trolled. Crystal units shall be in accordance with MIL-C-3098; subminiature crystals may be used.
39、3.4.6 Screwdriver adjustments. The following screwdriver adjustments shall be provided in the form of high torque controls. These controls shall be contained within the F-423/ARN filter module and shall be properly identified: a. Deflection sensitivity b. Balance c. Flag alarm d. Audio gain. The equ
40、ipment shall be so designed that maintenance adjustments shall not be required while in flight. 3.4.7 Antenna input. The antenna input shall be 52 ohms unbalanced. The voltage standing wave ratio (VSWR) at the antenna input shall be less than 10:l. I I 3.4.8 Fail-safe design. The equipment shall inc
41、orporate ccfail-safe design fea- tures. Malfunctioning of the equipment shall in no way contribute to the destruction of that equipment or any part of the weapon system which would result in loss of life. 3.4.9 Human engineering. The principles and requirements of human engineering shall be in accor
42、dance with MIL-H-27894 and MIL-STD-803. 3.5 Performance, The Receiving Set, Radio AN/ARN-67 shall perform glide slope receiver functions. Equipment performance shall be compatible with the requirements for signal transmissions as defined in MIGR-4146. I 3.5.1 Frequency. The r-f portions of the equip
43、ment shall be crystal controlled. The frequency range shall be from 329.3 to 335.0 MHz inclusive, with channel spacings of 0.3 MHz. 3.5.2 Indicator circuits. The indicator circuits shall convert the 90- and 150-Hz modulation of the received glide slope signal into direct current for operation of the
44、 horizontal pointer of Indicator, Low approach ID-525/ARN, as defined by MIL-1-25355, or equal. The indicator circuits shall consist of amplifiers feeding into 90- and 150-Hz filters whose output shall be rectified and fed to a course indicator in such a manner that the horizontal pointer shall defl
45、ect upward whenever the 150-Hz signal predominates and downward whenever the 90-Hz signal predominates. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-2722bA 58 m -7?777Ob 0154101 2 m MIL- R-2722 6A (USA F) I 3.5.3 When applying an r-f signal
46、of 332.0 MHz at a level of 700 microvolts modulated 40 percent with the indicated audio frequencies, with all receiver controls set for normal operating conditions, the overall audio bandpass of the receiver shall be as follows: Audio bandpass characteristics. Frequency (hertz) 30 50 65 85 f 0.5 90
47、f 0.5 95 * 0.5 116 f 5.0 142 f 0.5 150 * 0.5 158 * 0.5 200 3 O0 Response 28 db min of current at 90 Hz 20 db min of current at 90 Hz 6 db min of current at 90 Hz +0.5 to -1.5 db of currentat 90 Hz Ref 90 Hz +0.5 to -1.5 db of current at 90 Hz +O +0.5 to -1.5db of current at 150 Hz Ref 150 Hz +0.5 to
48、 -1.5db of current at 150 Hz 6 db min of currentat150Hz 20 db min of current at 150 Hz The preceding applies to three 1000-ohm indicator loads in parallel and three 1000-ohm flag loads in parallel. The design shall be based on each flag alarm movement having a resistance of 1000 ohms *3 percent with
49、 a “flag appear” current of 180 to 245 micro- amperes and a “flag disappear” current of 250 microamperes. It shall be possible to replace any indicator by its equivalent resistance without affecting the performance of the remaining indicators. 3.5.4 Flag alarm characteristics. The flag alarm output from the receiver, when fed to the course indicator, shall indicate failure of either or both the 90- and 150-Hz signal due t
