1、MIL-S-25878C( USAF) 10 February 196k Sup ers eding 20 April i960 1L-s-2587 8B( USA P) /- MILITARY SPECIFICA TION SELECTOR, ANTENNA C-2193B/A 1, SCOPE 1,l This specification covers the requirements for one type of antenna selector, designated Selector, Antenna C-2193B/A for use with 2 antennas and 1
2、receiver or receiver-transmitter. 2, APPLICABIB DOCUMENTS 2,l 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 hereinr SPECIFICATIONS Federal PPP-B-566 PPP-B-5 85 PPP-B-591 PPP-B-601 PPP-
3、B-621 PPP-B-636 PPP-B-676 PPP-T-60 Boxes, Folding, Paperboard Boxes, Wood, Wirebound Boxes, nberboard, Wood-Cleated Boxes, Wood, Cleated-Plywad Boxes, Wood, Nailed and Lock-Corner Box, Fiberboard Boxes, Set-up, Paperboard Tape, Pressure Sensitive Adhegive, Waterproof = for Packaging and Sealing Mili
4、tary JAN-P-100 Packaging and Packing for Overseas Shipment, General Specification MIL-P-il6 Preservation, Methods of MIL-E-5400 Electronic Equipment, Aircraft, General ML-T-SL2 2 Specification for Testing, Environmental, Aircraft Electronic Equipment Interference Control Requirements, Aircraft Equip
5、ment ,. n1-1-6181 . Fsc 5985 UREL;.- A% feast 9Q days pr“Por to conducting any forma3. preproduction or aeep?%anes tsatlng, the contractor shall prepare .3 copies of his test procedures esveafng the tests %o be conducted, procedures shall include bloek diagrams of the test setup, a step-by-step desc
6、rfption of each taust sequence, a Us% of the tesle equipment to be used9 and copies of data sheets that will be used to Pecord the date. testing shall begin only after formal approval by the procurbg activity. These test Formal 7 Provided by IHSNot for ResaleNo reproduction or networking permitted w
7、ithout license from IHS-,-,-MIL-S-25878C 57 = 7777906 003LL37 4 E b02 listed 533 902 shall be e%assif%ed as followst 6USS%F%CAT%ON OF TESTS,- The inspection and testing of the components b,4*1 TEST S.- The test sample shall consist of 5 each of each component mpresen%ative of the produc%ton eqiifpme
8、nt. with the manu%acturervs part number md such other information as required by The samples shall be identified $he pSOCUS%Sag BCtiV$%ye Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-2587 SC( USAF) 4.4.3.3.1 PREPRODUCTION RELIABILITY TESTS.-
9、 All 5 preproduction samples of the equipment shall be tested by the contractor for reliability in accordance with MIL-R-26667. Duration of the MTBF demonstration test on each unit shall consist of 50 on-off cycles in accordance with .301.1.1. permitting production, shall be judged on the basis of t
10、able 5.2 entitled “Reliability Accept-Re ject Criteria (Method 2) .“ Recording, data handling, and reporting procedures shall be in accordance with Ma-R-26667. Acceptance, .3.1.1.1 apply with the following additions and exceptionst TESP LEVEL.- Test level III, table 2,3, of MIL-R-26667 shall a. Cham
11、ber temperature rangerr The chamber .temperature range shall bs minus 5L0 to plus 850 C bo On-off cyclinge On-off cycHng shall be 1 hour at minus 54OC and 3 hours at plus 8SOC with continual electrical cycling. variance of the test chamber shall be 30 plus or minus 0.20C per minute The thermal ce El
12、ectrical cycling2 Electrical cycling shall be a continual repetition of the following: One mfnute audio in, antenna 1 Two minutes transmit, antenna 1 Ten mlaiutes cycling Two mfioltes transmit, antenna 1 One . After correction, all of the tests shall INDIVIDUAL TESPS MAY CONTINUE,- For production re
13、asons, individual But final acceptance of the items on hand or 4.5.4 DEFECTS IN ITEMS ALREADY ACCEPTED,- The investigation of a test failure could indicate that defects may exist in items already acceptede If so, the contractor shall fully advise the procuring activity of all the defects likely to b
14、e found and the method of correcting them, h06 TEST METHODS 4.6.1 EXAMINATION OF PRODUCT,- Each item produced under thfs specification shall be subjected to a visual inspection to determine compliance of the part or assembly with the requirements herain for materials, mrkmanship, finishes, and mecha
15、nical details. 4.6.2 the following procedure shall be used: generator having an impedance of 600 ohms or less at a frequency of 1000 plus or minus 50 cps, adjust the sensitivity control to maxmum and the d-c supply voltage to 24 plus or minus Oe1 volte Raise the input fmm the signal generator to 0.0
16、50 volt (50 millivolts), cause the relay in the selector to stop cycling and cause the memory relay to locke With the audio input level set at 1 volt, it shall be possible to decrease the sensitivity control until the selector starts cycling again wlthout using more than 95 percent of the adjustment
17、; rangee THRESHOLD SENSITIVITY UHF OPERATION,- To test the lower threshold, With an audio input from a signal This voltage shall To test the upper threshold, the following procedure shall be usen h,6,3 conventional events per unit time (WUT) meters. half cyc3e shall be compared ty using an oscillosc
18、ope or other suitable device. temperature. CYCLING SWITCHING TEST,- The smtching rate shall be measured using The dwell pefiods of: each The initial adjustment of the switching rate shall be made at mm No further adjustment shall be made until completion of all testso 8 Provided by IHSNot for Resale
19、No reproduction or networking permitted without license from IHS-,-,-MIL-S-25878C( USAT) 4.6.4 TACAN SENSITIVITY AND RECOVERY TEST.- To test sensitivity# the following procedure shall be usedt With an audio input from a signal generator having an impedance of 600 ohms or less at a frequenoy of 135 p
20、lus OP ndnus 5 cycles, adjust the sensitivfty control of the selector unit to maximum and the doc supply voltage to 24 plus or minus 0.1volt. control relay n the selector stops cycling, this setting shall be less than 0.5 volt. the selector stopped cycling as a reference, test recovery by decreasing
21、 the input voltage from the signal generator until the selector relay again begins cycling, minus 1 dbo Raise the input from the signal generator until the antenna The control voltage at Using tbe voltage value when The difference ln voltage shall be 3 plus or 40S0s with Drawing 57D12840, an audio s
22、ignal of OoE; volt, 135 cps shall be applied to pfn 12 of the antenna selector and the sensitivity so adjusted that the selector stops cyclfng. A continuity check shall be made between pins 10 and i3 wlth an ohmmeter, The resistance shall be less than 0,2 ohmo With the audio signal removed fmm pin 1
23、2 and the antenna seleetor in cycling condftisn, the ohmmeteP check between pina 10 and i3 should indica4e an open condition or an excess of 100,000 oh, 4.6,6 TRANSIENT SUPPRESSION l“.- An inductive load that will produce a transient of approximately h0a volte on the control. lina ishall be controll
24、ed by the antenna selector at its nomad. eyelfng rate for 50 houm. The amount of suppression shall be measured ta dettermfne compliance with 3e5050 AZIMUTH DISABLE TESTo- With the antenna connected in accordance 4.6.7 by means of an audio signal of 0,s volt at i000 cpa applied to the audio input ter
25、mIna%, cycling) shall be measured to detemhe compliance with 305060 tfme shall be an average of a% least 10 sequence8. 4.6.8 operation arad adjusted foro,j volt sensitivity9 the audio input shall be change from O to 40 volts rn at 9000 cyc%es, the cyc3A.c action shall. stop. action shall be sustaine
26、d and no change in adjustment shall be neceserary to resume noma operation. RECOVERY TESTo- The antenna selector shall be caused to stop cycling When the signal is removed, the reco-vexy time (resume The recovepy MAX4cMM SIGNAL TESTo- With the antema selector connected for norma With this voltage ap
27、plied, Upon removal of the au5.o voltagep the cycUc! 12 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-8 587 8C( USA F) 4.6.9 MEMORY CIRCUIT TEST.- A test setup consisting of Radio Set AN/ARC-34, two SO-ohm dummy load wattmeters, a TS-510 or e
28、qual ahf signal generator, and a single-pole double-throw coaxial switch, SA-S21/A, shall be connected in accordance with figure 1. The signal generator shall be substituted for 1 of the SO-ohm loads and the input increased until the receiver squelch opens and the cyclic action of the antenna select
29、or stops. Then the SO-ohm dummy load shall be substituted for the signal generator and the transmitter keyed for at least 10 intervals of 5 seconds each with 5 seconds in receiving condition between each transmission. During each transmission, the antenna selector shall select the dumy load that was
30、 replaced by the signal generator. The test; shall be repeated by substituting the signal generator for the other 50-ohm dumy load, always select the load that was memorized by substituting the signal generator. In each casep the antenna selector shall 4.6,lO MANUAL OVER-RIDE .PROVISION TEST.- Using
31、 the test setup shown on figure lo it shall be possible to select dummy load No, 1 OP No, 2 independently of the antenna selector for either transmission or reception by use of positions 1 and 2, switch shall restore the antenna selector to normal control, The selection of the third position on the
32、406el IREQUENCY RESPONSE TEST.- Using an audfo slgnal generator and a fixed settlng of threshold sensitivity, the response between input frequencies of 100 and 4000 cps shall be determined, limits specified in 3.5.2*2 durfng and following any of the environmental tests specified herefn. The response
33、 shall be within the b.6.12 in 4.6.9 shall be repeated us-fng 21, and 29 volts in lieu of the 2T05 volts dc specified on figure 1, sensitivity threshold, the antenna seleetor shall pass the memory circuit test. during which, the eycfing rate shall be witMn the 2-percent tolerance specified in 347 an
34、d shall be sealed in accordanue with the appendix %hereto, intermediate, or exterlar container confonns to PPP-B-636 (type I, class 2 or type IIp class 2)$ and 5s sealed at all joints and seam including manufacturers Insofar as practicable, exterior containers Containers Containers shalle provided w
35、ith a case The case lfner will not be required when th uni%, joint, with hp confo-pming to PPP-T-600 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL4-2 5 8 7 8C ( USA 3) 5,2.2 LEVEL Bo- The antenna selector, preserved and packaged to meet 5.1.1,
36、shall be packed in domestic-type exterior containers meeting PPP-B-591, PPP-B-601, PPP-B-585, PPP-B-621, PPP-B-636, or MIL-B-10377. consistent with the protection required. insofar as practicable, exterior containers shall be of uniform shape and aise and contain identical quantities. The gross weig
37、ht of each pack shall be limited to approximately 500 poundse Containers shall be closed and strapped in accordance with the applicable container specification or appendix thereto. When fiberboard containers are used, the fiberboard shall meet the special mquirements table of PPP-B-. Exterior contai
38、ners shall be of minimum cube and tare 5.2.3 the carrier shall be packed in exterior-type shipping containers in a manner that will insure safe transportation at the lowest rate to the point of delivery, classification rules or regulations of other common carriers a8 applicable to the mode of transp
39、ortation, LEVEL C.- Packages which require over-packing for acceptance by Containers shall meet consolidated freighb 5.3 PHYSICAL PROTECTION.- Cushioning, blocking, bracing, and bolting, as requfred, shall be in accordance with JAN-P-1O except that for domestic shipments, water-proofing requirements
40、 for cushioning materials and containers shall be waived. Drop tests of JAN-P-100 shall be waived when preservation, packaging, and packing of the item is for immediate use or when drop tests of MIbP-116 apply. Soh accordance with ML-srn-i29. be Selec tor, Antenna C-2193B/A e MAWING.- Interior and e
41、xterior containers shall be marked in The shipment marking nomenclature shall 6. NOTES 6,l INTENDED USEe- Seleetor, Antenna C-2193B/A is intended to nntomatically control the r-f transmission line switch, SA-521/Ap in selecting 1 of 2 UM antennas on the basis of a minimum usable signal, eitbr from a
42、n UHF voice communication set or a TACAN set, 16 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-25B7C 57 W 7779706 003Lllt 5 MIL-S-2 587 8C ( USAF) 6.2 ORDERING DATA.- Procurement documents should specify the following? a. bo Title, number, an
43、d date of this specification Number of preproduction samples, point of testing, and delivery Standard Government-furnished sample source (see 3.7) Submission of kst programs for approval (see 3m4m1, 4m1.1, That preproduction reliability samples be refurbished by the Selection of applicable levels of preservation, packaging, of preproduction test report (see 4.4ml and 4.4.2) C. d. 4.4.3.1, and 4.5.2) e. contractor fm packing, and marking. ND/l.Int SEDTO c/ 17 GPO 808-390-2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
