1、MIL-R-28733A 58 7797706 0354379 3 W ML-R-28713At EC) MIL-R-28713 12 June 1972 MILITARY SPEC IF I CAT ION RADIO SET, PORTABLE, SEARCH AND RESCUE OPERATION ANIPRC-%( ) r This specification is approved for use by the Naval Electronic Systems Comnand, Department of the Navy, and is available for use by
2、all Departments and Agencies of the Department of Defense. . 1. SCOPE 1.1 SCO e. This specification includes the performance requirements for a complete two- channel, porta + le radio comnunication set (transceiver), with accessories, which provides homing information and two-way comnunication betwe
3、en life rafts and searching ships and aircraft. equipment described herein is intended for shipboard and life raft use and will be subject to sea water immersion. The 2. APPLICABLE DOCUMENTS 2.1 Issues of documents. The following documents of the issue in effect on date of invita- tion for bids or r
4、equest for proposal form a part of this specification to the extent specified here in. SPECIFICATENS MILITARY MIL-S-901 MIL-E-16400 MIL-E-17555 STANDARDS FEDERAL FED-STD-595 MILITARY MIL -STD- 105 MIL -STD-108 MIL-STD-109 Shock Tests, H. I. (High Impact), Shipboard Machinery, Equipnent And Systems,
5、Requirements For Electronic, Interior Comnunication And Navigation Equipment, Naval Ship And Shore, General Specifi- cation For Electronic Ana Electrical Equipment, Accessories, And Repair Parts, Packaging And Packing Of Color Sampling Procedures And Tables For Inspection By Attributes Definition Of
6、 And Basic Requirement For Enclosure For Electric And Electronic Equipment Quality Assurance Terms And Definitions Beneficial comnents (recomnendat ions, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Cmander, Naval Electronic Syst
7、ems Comnand (ELEX-5043), Washington, D.C. 20360, r bv usina the self-addressed Standardization Document Improvement Proposal -.I - 1 (DD Fori 1426) appearing at the end of this document, or by letter. . I THIS DOCUMEENB CQNTAIRS /o PAGES. P Provided by IHSNot for ResaleNo reproduction or networking
8、permitted without license from IHS-,-,-MIL-R-287L3A 58 7777906 0254380 T MIL-R-28713A( EC) MIL-STO-167-1 MIL-STD-454 MIL-STO-781 MIL-STD-810 MIL-STO-965 DRAW I NGS Microf i lm reel 828652 Microfilm reel #28653 Mechanical Vibration Of Shipboard Equipment (Type 1- Environmental And Type li- Internally
9、 Excited) Standard General Requirements For Electronic Equip- ment Reliability Design Qualification And Production Acceptance, Tests: Exponenti al Distribution Environmental Test Methods Parts Control Program (Copies of specifications, standards, handbooks, drawings, and publications required by con
10、- tractors in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.) 3. REQUIREMENTS 3.1 First article. 3.2 General. 3.2.1 Transceiver description and operation. When specified (see 6.2), the contractor shall furnish
11、sample unit(s) for first article inspection and approval (see 4.3 and 6.3). The transceiver shall be a two-channel micro- miniature solid state hand-held radio set which will provide radio distress signals for search and rescue (SAR). continuous wave (MCW comnunications on two fixed tuned crystal-co
12、ntrolled radio frequency (RF) channels. One RF chinnel shall be tuned to 121.500 megahertz (MHz) and the other channel shall be tuned to 243.000 MHz. 3.2.2 Frequency characteristics. The transceiver shall provide voice, beacon, and modulated 3.2.3 Modes of operation. Voice. modulated voice communica
13、tions on either 121.5 or 243.0 MHz (RF frequency select- able by switch). Beacon. In this mode, the transceiver shall provide one-way continuous transmis- sion with automatic equal time sharing between 121.5 and 243.0 MHz. carrier shall be amplitude modulated with a tone sweeping downwards over the
14、fre- quency range from 1000 to 300 hertz (Hz) at a rate of two to three sweeps per second. d. Code MCW. In this mode, the transceiver shall provide two-way, simplex, amplitude modulated tone comnunications on either 121.5 or 243.0 MHz (RF frequency selectable by switch). to-modulate switch is depres
15、sed. As a minimum, the following equipment shall be supplied, unless otherwise The transceiver shall provide the following modes of operation: a. Power OFF b. In this mode, the tranceiver shall provide two-way, simplex, amplitude c. Each RF A 1000-Hz tone shall be used to modulate the carrier when t
16、he push- 3.2.4 Equipment. specified in the contract: a. Transceiver, including internal battery b. Antenna c. Carrying case d. Two spare internal batteries e. Tester 2 o Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-RI; -?-28713A( EC) 3.2.5 Size an
17、d wei ht. Maximum dimensions of the transceiver (not includirig antenna) are 15.24 centimZGT6 ffc -70 kHZ 6 dB maximum 40 dB minimum 3.3.3.3 Audio output power and distortion. The audio output level shall be adjustable to a minimum of 100 mW. Audio distortion at 100 mW shall be less than 10 percent.
18、 3.3.3.4 Audio frequency response. The audio frequency response shall not vary more than +2 dB or -5 dB from the reference audio level at 1000 Hz over the frequency range from 300 to 3000 Hz. 3.3.3.5 Residual hum and noise. The ratio of residual hum and noise to rated audio output (100 mW) shall be
19、greater than 30 dB. 3.3.3.6 Squelch. A squelch circuit shall be provided. The receiver squelch shall be non- adjustable withthequelch circuit designed to unsquelch with an RF input signal of less than 4 ?-IV, 3.3.3.7 Automatic gain control. for signal input levels from 6 UV to 100 mv with a constant
20、 90 percent modulation. 3.3.3.8 Frequency stability. percent from the reference frequency (121.5 or 243.0 MHz). measured between the 6 d8 selectivity frequencies. The audio output of the receiver shall remain within 10 dB The center of the passband shall not vary more than i 0.001 The passband is th
21、e frequency range 3.3.4 Accessor i es. 3.3.4.1 Antenna. A removable antenna shall be provided. The antenna electrical length shall be a halfength at 121.5 MHz. to optimize RF power transfer from the transmitter to the antenna. An internal antenna matching network shall be provided 3.3.4.2 Carryin ca
22、se. The carrying case shall be designed to contain the transceiver, antennas, two -A- spare a eries, and one technical manual in separate compartments. The spare bat- teries and technical manual shall be individually packaged in a waterproof wrapper prior to in- sertion in the separate compartments.
23、 cluding transceiver, batteries, and technical manual, will float in fresh water. The transceiver shall be fastened to the carrying case with a 1.83 m (6-foot) length of detachable line. The carrying case shall be designed so that the case, in- 3.3.4.2.1 Carrying case color and marking. The case sha
24、ll be a bright orange color in accordance with - - o or o. , and shall have the followin information marked on two outside s,:a,“E $?I gothicNtyp?:zttering 1.91 cm (0.75 (3/4) in7 in height: a. b. Applicable National stock number c. Equipment nomenclature The title Emergency Lifeboat Radio 3.3.4.3 B
25、attery. The battery requlred to operate the equipment shall be a single lithium sulfur dioxidebattery of a diameter not greater than that of a standard D size cell. After a minimum of three years of storage the battery shall be capable of complying with the requirements of 3.3.4.3.1. pressures, over
26、loads, and cell reversal effects. The battery shall be marked with the date of manufacture and the Nat ional stock number. The battery shall incorporate safety devices to protect against internal over- 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-
27、,-MIL-R-28713A 58 7779706 O354384 7 MIL-R-28713A( EC) 3.3.4.3.1 Battery operating life. The battery (one unit) shall have the capacity, at 25OC, to provide a minimum of 24 h ours of continuous operation in the following modes of operation: a. Beacon b. Voice: 50 percent transmit and 50 percent recei
28、ve duty cycle at 90 percent modulation and 100 mW receive audio for a one-minute period. At -1OOC the operating life of the battery shall provide a minimum of 16 hours of operation. battery shall be judged acceptable if the RF power output does not degrade more than 3 dB and the receiver sensitivity
29、 does not degrade more than 7 dB at the end of both of these specified operation periods. of units speciTieasee 6.29. minimum, shall test for compliance with the following equipment characteristics: The 3.3.4.4 Tester. A portable, self-contained GO/NO-GO tester shall be provided in the quantity The
30、tester shall check the modes of operation (see 3.2.3) and, as a a. b. c. Audio distortion (see 3.3.2.4) d. Sensitivity (see 3.3.3.1) e. Audio distortion (see 3.3.3.3) f. RF power output (see 3.3.2.1) Carrier frequency stability (see 3.3.2.2) Automatic gain control (see 3.3.3.7) 3.3.4.4.1 Constructio
31、n. The tester shall be constructed in accordance with the drawings in microfilm reelT8653. 3.3.4.4.2 Environmental range. The tester shall operate without any degradation over a temperature range from OC to 5OoC and at any relative humidity up to 95 percent. 3.4 .Workmanship. 4. QUALITY ASSURANCE PR
32、OVISIONS 4.1 Responsibility for inspection. All workmanship shall be in accordance with Requirement 9 of MIL-STD-454. Unless otherwise specified in the contract, the con- tractor is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified in t
33、he contract, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government; The Government reserves the right to perform any of the inspec- tions set forth in the specification where such insp
34、ections are deemed necessary to assure supplies and services conform to prescribed requirements. All quality assurance operations performed by the contractor will be subject to Government verification at any time. limited to, a) Surveillance of the operations to determine that practices, methods, an
35、d procedures of the written quality program are being properly applied, b) Government product inspection to measure quality of the product to be offered for acceptance, c) Government inspection of delivered products to assure compliance with all inspection requirements of this specification. Failure
36、 of the contractor to promptly correct deficiencies discovered by him or of which he is notified shall be cause for suspension of acceptance until corrective action has been taken or until conformance of the product to prescribed criteria has been demonstrated. 4.1.1 Government verification. Verific
37、ation will consist of, but is not 4.1.2 Quality assurance terms and definitions. Quality assurance terms used in this speci- fication shall be as defined in MIL-STD-IUY. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-ZB7L3A 58 7777706 OLCLi3
38、B5 7 4.2 Classification of inspections. The inspection requirements specified herein are clas- sified as follows: a. b. c. Reliability demonstration (see 4.5) d. First article inspection (see 4.3) Quality conformance inspection (see 4.4) 1. Production inspection (see 4.4.1) 2. Production control ins
39、pection (see 4.4.2) . Inspection of preparation for delivery (see 4.6) 4.3 First article inspection. Unless otherwise specified (see 6.2), two transceivers with antennas and two testers tif applicable) shall be required for first article inspection. article inspection shall consist of all examinatio
40、n and testing necessary to determine compliance with the requirements of this specification. specified in 4.4.1 through 4.4.3 and the salt fog test of MIL-E-16400. following: First First article inspection shall include the tests 4.4 Quality conformance inspection. a. Production inspection b. Produc
41、tion control inspection Quality conformance inspection shall consist of the 4.4.1 Production inspection. Production inspection shall be made on every equipment offered for delivery. manshp and reveal the omissions and errors of the production process such as functional and per- formance tests at a l
42、imited number of points in the required range, tests which detect deviations from design, tests of adjustments, and tests which detect hidden defects of material. Production inspection shall consist of the tests specified in 4.4.1.1. This inspection shall comprise such examination and testing as wil
43、l prove the work- 4.4.1.1 Performance tests. Performance tests shall verify compliance with the following requirements: a. Transceiver: b. Receiver function: 1. Control functions (see 3.3.1) 1. Sensitivity (see 3.3.3.1) 2. Selectivity (see 3.3.3.2) 3. Audio output (see 3.3.3.3) 4. Audio distortion (
44、see 3.3.3.3) 5. Residual hum and noise (see 3.3.3.5) 6. Squelch (see 3.3.3.6) 7. Automatic gain control (see 3.3.3.7) 8. Frequency stability (see 3.3.3.8) 1. RF output power (see 3.3.2.1) 2. Carrier frequency stability (see 3.3.2.2) 3. Audio frequency distortion (see 3.3.2.4) 4. Hum and noise level
45、(see 3.3.2.5) 5. Modulation capability (see 3.3.2.6) 6. Sidetone (see 3.3.2.7) 1. Characteristic measurements (see 3.3.4.4) c. Transmitter function: d. Tester: 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. MIL-R-287L3A 58 m 9777706 035LI386 O m
46、 MIL-R-28713A( EC) 4.4.1.2 Equipment conditioning. 4.4.2 Production control inspection. Equipment conditioning shall be as specified in 4.4.3. This inspection shall include the tests specified in 4.4.2.3, 4.4.2.4, and 4.4.2.5. levels of MIL-STD-105. inspection utilizing an acceptable quality level (
47、AQL) of 6.5 percent. Production control in- spection shall be performed on inspection lots that have passed-production inspection (see 4.4.1). The equipment shall conform to the requirements of production control inspection prior to release for shipment. 4.4.2.1 Noncompliance. If a sample unit fails
48、 production control inspections, the contrac- tor shall imnediately investigate the cause of failure and shall report to the Government inspector the results thereof and details of the corrective action taken on the process and all units of products which were manufactured with the same conditions,
49、materials, and processes. Government inspector does not consider that the corrective action will enable the product to con- form to specified requirements, or if the contractor cannot determine the cause of failure, the matter shall be referred to the contracting officer. which have been subjected to and passed production control inspections, may be accepted on con- tract provided that they are resubjected to and pass productibn inspection after repair of all damage.
