1、MIL-T-27402 66 m 7777906 0336626 3 I / -. MI L-T-394 O 2 (MC) 25 May 1982 MILITA transmit (Xhn); battery (BAT); or field strength meter (FSM). (d) Frequency Select Switches - four separate switches with digital display compatible with AN/PRC-68 Rdio Set synthesizer switch readout. 3.3.4 Test set met
2、er. Shall be Amy Part No. SM-D-660332 or equal. 3.3.5 Cables. “KI radio set and test cable assem5lies shall be provided: Cable Asserrbly, Antenna, Drawing Part NO. 565112-801 and Cable AssemSly Audio, Drawing Part No. 466478-801. 3.3.6 Antenna. An antenna, Drawing Part No. 914161-903 shall be provid
3、ed. 3.3.7 Interchangeability. Provisions for interchangeability shall Se in accordance dth requirement 7 of IL-STD-454. 3.3.8 soldering. Solderig shall be in accordance with requirement 5 of MIL-STD-454 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,
4、-,-.- - - MIL-T-27Y02 66 m 7777906 0136630 5 9 MIL-T-29402 (MC) 3.3.9 3urn-in. The test set shall be able to withstand the burn-in test specified in 4.6.7 prior to acceptance for delivery. ment 1 of MIL-sTD-454. 3.3.10 Safety. Personnel hazard safety shall be in accordance .with Require- 3.4 Reliabi
5、lity. The test set shall have a lower test mean-time between failures (MTBF), (e), ,of 2000 hours ,and an upper test MTFB (eo) of 4000 hours . in accordance with Test IV C of MIL-STD-781. 3.4.1 Reliability program plan. A reliability program plan shall be prepared in accordance with MIL-STD-785. ana
6、lysis arrl corrective action systen. The plan shall include a failure data collection 3.4.2 Reliability prediction. A reliability prediction shall be preformed in The prediction shall accordance with MIL-STD-785 ad section 2 of MIL-HDEiK-217. assume a +6SoC external ambient air temperature, consider
7、ing temperature rises within the equipment enclosures and asssume a “Ground, Mobile“ environment. 3.4.3 Failure data collection analysis and corrective action. A failure data. The system collection, analysis and corrective action systen shall be required. shall be described in the reliability progra
8、m plan. maintenance, accessibility and replacement of all mdules and parts as primary design considerations. extent practicable when the system is operational. 3.5 Maintainability. The test set shall be constructed to provide ease of Maintenance and repair shall be accomplished to the maximum 3.5.1
9、Maintainability program plan. A maintainability program plan shall be prepared in accordance with MIL-STD-470 . 3.5.2 Maintainability prediction. A maintainability prediction shall be performed in accordance with Procedure III of .PUL-HDBK-472 at each of three levels of maintenance. 3,5.2.1 Organiza
10、tional level. Corrective maintenance limited to replacement of battery. Maximum time to repair shall be 15 minutes, at the 95th percentile. 3.5 . 2.2 intermediate levei. Corrective maintenance imi ted to replacement of battery and modules. fault isolation. Maximum time to repair shall be 3 hours, at
11、 the 95th percentile. Standard t.est equipment will be used to perform module Repairs to be made to the piece part level of reparable Maximum time to repair shall be 3 hours, at the 95th percentile. 3.5.2.3 Depot level. mdules. Normal bench tools and standard test equipment shall be employed. 3.6 Pe
12、rformance. The performance requirements of the test set shall be as -f 01 lows : 3.6.1 9uty cycle. The test shall be capable of continuous operation without degradation of performance. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MI L-29 40 2 (M
13、C) 3.6.2 Test set functions. The test set shall have four basic functional test capabilities as follows: (a) Battery Test (b) Receiver Test (c) Transmitter Test (d) Field Strength Indicator . 3.6.2.1 Battery test. The battery test circuit shall provide for the measure- ment of the battery voltage un
14、der full load conditions of 330 + 30 milliamperes at 4.5 vdc. The function switch shall have spring return from th battery psition, and when in this position shall indicate the status of the battery on a scale frm O to 10. The scale shall be divided so the number 5 is in the center of the scale. A c
15、olored barid shall appear under the scaledivisions and shall be colored red to the left of center scale, and green to the right of center. For the battery voltage test, the divisions shall be approximately 1 V per division with tw divisions equal to 9 Vdc i-15 percent, 5 equal to 12 Vdc 4-5 percent,
16、 10 qual to 17 Vdc - +lo percent. Reverse battery polarity protection shall be provided. 3.6.2.2 Receiver test. In this psition, the test set shall provide an indica- tion of the quieting sensitivity of the receiver undergoing tests. synthesizer shall be included in the test set to allow compatibili
17、ty with AN/PRCG$ Radio Set frequencies. the 1000 channels of the radio sets. frequency selection switches for selection of the desired test frequency. overall Erequency stability of the test set shall be i-0.005 percent over the environmental extrem tanperatures specified for the test set. The test
18、set synthesizer output shall be attenuated to provide a 2.0 +2, -0 microvolt signal into a 50 oh load at the selected operating frequency. This attenuated signal is mupled through an external cable to the radio set to be used to measure receiver sensitivity. An acceptable quieting sensitivity shall
19、be indicated by a meter reading in the green section v.hereas a reading in the red section indicates poor sensitivity of the receiver. The audio meter shall indicate a reduction in audio level necessary to produce mid scale (50 percent) reading when the test set is in the R3AD position of the receiv
20、e position. This reduc- tion is in the measure of quieting and shall be 14 - + 1 decibels (dB) . A frequency This will allow sensitivity measurements of any one of The The test set front panel shall include four 3.6.2.3 Transmitter test. The test set shall include a test circuit which Will provide a
21、 meter indication of the transmitter radio frequency power output with the antenna coupler bypassed. mid-scale indication of 0.5 watt (W) + 0.1 W and a full scale indication of 2 w - $. 0.1 W, over the range of 30 to 75.95 megahertz (YHz) and shall riot vary mre than + 0.1 W over this frequency rang
22、e from a reference of 1 W at 54.05 FHz. 3.6.2.4 Field strength indicator. The test set shall include an untuned test circuit arid pick up antenna which will provide a meter indication of transmitter power output over the frequency range of 30 to 79.95 MHz. A diode limiter shall be included ix protec
23、t against meter burn out. The sensitivity of Lhis test circuit shall enable the transmitted output of an AN/PRC-68 Radio Set to provide at least i/a scale readiry when the radio is located from 9 inches to 24 inches froin the test set antenna. The test set meter shall be calibrated for a The meter t
24、est circuit shall be relativity insensitive to frequency - 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-T-27Ll02 66 W 7777706 OL3bb32 7 W MIL-T-29402 (MC) 3.6.2.5 Voltage regulator. The test set shall include provisions for being powered by
25、 an alternative 24 V dc power source. A voltage regulator circuit shall be included which will maintain a 14 V dc + 0.5 V dc regulated supply to the test set with an input voltage of 19 to 32 V dc. of this internal power supply shall be provided. Sbrt circuit protection 3.6.3 Enviromental requiremen
26、ts. The environmental requirements for the test set shall be as follows: 3.6.3.1 Temperature classification. The temperature Classification of the test set shall be Range 1 of Table 1 of MIL-E-16400, except that the operatiq range shall be -40 C to +S5 C. secured wilke the case watertight in accorda
27、nce with MIL-S?D-108. withstandiq the vibration test specified in NIL-S?D-810, Yethod 514.2, Procedure X, Curve AV. 3.6.3.2 Case. The test set shall incorporate a hinged cover which when 3.6.3.3 Vibration. Tk test set, with cover secured, shall be capable of 3.6.3.4 Drop. The test set shall be capab
28、le of satisfactory operation with no dwradatxoutside of performance limits after compl.etion 4.6.14. with MIL-S-810, Procedure II, Method 516.2 with cover secured. set shall withstand this test with no mechanical damage other than superficial case damage. of tests in The test The test set shall be s
29、ubjected to a series of drops in accordance 3.5.3.5 Humidity. The test set, With aver open, shall 5e capable of passing the huqidity test specified in MIL-E-16400. 3.5.3.6 Salt fog. Tk test set, with cover open, shall be capable of passing the salt fq test specifid .in MIL-E-16400. 3.6.3.7 Inclinati
30、on. The test set shall operate rnrmally up to 90 degrees frm its level position. The receiver-transmitter an3 battery shall remain connected to the test set without external support up to 60 degrees from level. 3.7 Dimensions. The maximum dimensions of the test set shall be as follows: Height 7.7 in
31、ches Width 11.5 inches Depth 8.5 inches 3.9 Weight. Tk maximum weight of the test set shall be 10 pounds (4.54 kilo- 3.9 Finish. Tk test set case shall be finished in accordance with the requirernents of MIL-E-16400 except that the finished coat of the case shall be in accordance with MIL-E-52798 (f
32、orest green). grams) * 3.10 Marking. Markiry shall be in accordance wit 1-2!3800. 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-29402 bb W 999990b 0336633 O W .- MIL-T-29402 (.!E) 3.11 Workmanship. Workmanship shall be in accordance with Re
33、quirement 9 of MIL-rn54 . 4, QALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the supplier is responsible for the performance of all inspec- tion requirement as specified herein. Except as otherwise specified in the con- tra
34、ct or purchase order, the supplier may use his om or any other facilities cuit- able for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in the documnt where such insp
35、ections are deemed necessary tu assure supplies an3 cervices conform to the prescribed requirements. 4.2 Classification of inspection. The inspection requirements specified herein are classified as follows: (a) First article (See 4.3) (5) guality conformance (See 4.4) (1) Production inspection (See
36、4.4 .i) (2) Production control inspectim (See 4.4.2) (3) Emrirormental inspection (See 4.4.3) (4) Inspection of preparation for delivery (see 4.7) 4,3 First article inspection. The first articles shall be subject to all o the examinations ard tests indicated in Table I. I_ TABLE I. Tests. - 1st Ell-
37、 _ - Req. Test Arti- Prod Prod vi ron- No. Test Para Para cle Imp Cont mental 1. 2. 3, 4, 5, 6. 7, 8, 9. 10 . 11, 12 13 14 15 16 17 18 . 19 . 20 Temperature Case Vibra ti on Drop Hunidi ty Sait Fog Inclina ti on Reliability Maintainability Electrical Dimensions & Weight Interchangeability Burn-In Ba
38、ttery Test Receiver Test Transmitter Test Field Strength Indicator Voltage Rqulator Mechanical Inspection Inspection of Preparation 3,701 4eSm1.1 3.7.2 4.6.1.2 3.7.3 4.6.1.3 3.7.4 4 06 m1 e4 3.7.5 4.6.1.5 3 .7 .ti 4 a5 01.6 3.7.7 4.6.1.7 3 04 4.5.2 3 05 4 .6.3 3.3.2 4.6.4 3.8 & 3.9 4.5.5 3.3.7 4 05
39、05 3.3.9 4.5.7 3.6.2.1 4.5.9.1 3.5.2.2 4.6.8.2 3.52,3 4.5.9.3 3.6.2.4 4.8.4 3.5.2.5 4.5.3,5 4 05 4.5 5 4.7 X X X X X X x X X X X X X X X X X X X X X Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_- MIL-T-29402 lab W 7779706 033lala3Ll 2 MIL-T-29402
40、 (MC) 4.4 Quality conformance inspection. The quality conformance inspection shall consist of the following. 4.4.1 Production inspection. Production inspection shall be made on every test set offered for delivery. The inspection shall consist of examination and testing which will prove the mrkmnship
41、 and reveal the omissions and errors of the production process such as functional ard performance tests from design, tests of adjustment, and tests *ich detect hidden defects of material. ero- duction inspection shall include the tests indicated in Table I. 4.4.2 Production control inspection. Produ
42、ction control inspection, fncludirq smpliq, shall consist of tests indicated in Table I and the inspection procedures of NIIL-SlD-105 using the special inspection levels. The inspection level shall be S-3 for normal, tightend, and reduced in- spection. The acceptable quality level (AQL) shall be 6.5
43、 percent. A lot is defined as one months production of test sets. inspection shall be performed on test sets which have passed production inspection. production control inspection prior ta release for shipment. Production control The test sets shall satisfactorily meet the requirements of 4.4.2.1 Re
44、jected lots. If an inspection lot is rejected, the supplier may withdraw the lot from further inspection. a rejectd lot to correct the defective units and reinspect the lot using tightened inspection. Rejected lots shall be kept separate from new lots an3 shall not lose their identity. The supplier
45、may also rework 4.4.3 Enviromental inspection. Environmental inspection shall consist of tests indicated in Table I aI-id shall be performed on test sets which have Seen subjected to and have passed production inspection. 4.4.3.1 Sampling for environmental inspection. Three test sets shall be select
46、ed from each successive 100 test sets produced or fraction thereof. The first sanple test sets shall be selected from the first months production. Environmntal tests shall be distributed within each sample of three test sets as follows: EQUIPMENT TEST NUMBER Test Set No. 1 10 Test Set No. 2 2, 5, 12
47、 . Test Set No. 3 3, 7 4.4.3.2 Nonconforming environmental sample test sets. investigate the cause of failure and shall report to the quality assurance representative the results thereof and details of the corrective action taken to correct units of product which were manufactured under the citrne c
48、onditions with the same materials, processes ad so forth. If the quality assurance representative does rot mnsider that the corrective action will enable the product ta meet requirments specified herein, or if the contractor cannot determine the cause of failure, the matter shall be referred to the
49、contracting officer. if a sample test set . fails tihe inspection specified in 4.4.3, the contractor shall immediately 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-29402 (MC) 4.4.3.3 Reinspection of conforming environmental sanpie units. Sample units which have been subjected to, and passed, environmental tests my be acceDted on the contract providejl they are resubjected to, and pass,
