AN-GRA-71_coder-burst_transmission_serv_user_TM11-5835-224-12_1969.pdf

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1、TM 11-5835-224-12 DEPARTMENT OF THE ARMY TECHNICAL MANUAL OPERATOR AND ORGANIZATIONAL MAINTENANCE MANUAL CODER-BURST TRANSMISSION GROUP AN/GRA-71 This copy is a reprint which includes current pages from Changes 2 and 5. HEADQUARTERS, DEPARTMENT OF THE ARMY MAY 1964 Changes in force: C 2 *TM 11-5835-

2、224-12 C 2 CHANGEDEPARTMENT OF THE ARMY HEADQUARTERS No. 2Washington, D.C., 8 July 1969 Operator and Organizational Maintenance Manual CODER-BURST TRANSMISSION GROUP AN/GRA-71 TM 11-5835-224-12, 27 May 1964, is changed as follows: Title is changed as shown above (as changed by C 1, 24 Jun 66). The p

3、arenthetical reference to previous changes ( example: page 1 of C 2) indicates that pertinent material was published in that change. Page 4, preface, paragraph A. Delete paragraph A (as changed by C 1, 24 Jun 66), and substitute: A. Indexes of Equipment Publications 1.DA Pam 310-4. Refer to the late

4、st issue of DA Pam 3104 to determine whether there are new editions, changes, or additional publications pertaining to the equipment. 2.DA Pam 310-7. Refer to the latest issue of DA Pam 310-7 to determine whether there are modification work orders (MWOs) pertaining to the equipment. *This change sup

5、ersedes C 1, 24 June 1966. 1 Paragraph B. Designate the -first subparagraph as: 1.(As changed by C1, 24 Jun 66) Delete the following subparagraphs and- substitute: 2.Report of Packaging and Handling Deficiencies. Fill out and forward DD Form 6 (Report of Packaging and Handling Deficiencies) as presc

6、ribed in AR 700- 58 (Army), NAVSU7P Publication 378 (Navy), AFR 714 (Air Force), and MCO P4610-5 (Marine Corps). 3.Discrepancy in Shipment Report (DISREP) (SF 361). Fill out and forward Discrepancy in Shipment Report (DISREP) (SF 361) as prescribed in AR 55-38 (Army), NAVSUP Pub 459 (Navy), AFM 75-3

7、4 (Air Force), and MCO P4610.19 (Marine Corps). 4.Reporting of Equipment Manual Improvements. Reporting of errors, omissions, and recommendations for improving this publication by the individual user is encouraged. Reports should be submitted on DA Form 2028 (Recommended Changes to Publications) and

8、 forwarded direct to Commanding General, U.S. Army Electronics Command, ATTN: AMSEL-ME-NMP-AD, Fort Monmouth, N.J. 07703. Page 28. Add paragraphs 2.6 and 2.7 after paragraph 2.5: 2.6 Premission Operational Check a.Procedure. The equipment operator should perform a premission operational check on the

9、 AN/GRA-71 before going on an assigned mission. Locate the AN/GRA-71 and the associated radio set (para 2.7) a few hundred yards from the base station. Set -p the equipment for communication with the base station, and then record 20-word messages 2 on the magnetic tape in the two CA-3B cartridges. R

10、ecord one message on one magnetic tape with the CO/B-8 Coder and a message on the remaining tape with the COMB Coder. Before performing this premission check, arrange with the base station for receiving the test messages. Figure 2-7 illustrates a typical example. Perform the test transmission by fol

11、lowing the steps given in the chart below: b.Premission Operational Chart. Step No. Performance procedure 1- 2- 3- Remove the cover from the KA-3 Keyer Adapter (fig. 2-3). Remove the components from the storage compartments and remove or open the covers of those compartments that have covers. Refer

12、to the technical manual for the authorized transmitter operating instructions. Tune the transmitter for operation with the base station. Turn the transmitter off. Some configurations do not need the KA-3 Keyer Adapter. A typical example is shown on figure 2-6. Attach the TRANS cable on the KA-3 Keye

13、r Adapter to the transmitter. Attach one CA-3B Cartridge (fig. 1-5) to the CO/B-8 Coder (fig. 1-2) locking pins. Press down on the CO/B-8 Coder word space button gently and slowly (fig. 3-4), and observe the following: a.Tape moves forward as evidenced by the movement of the white lines on the stora

14、ge spool (fig. 1-5) in two steps. b.Two distinct clicks are heard when the button is pushed downward, gently, slowly, and completely. Two distinct clicks are heard when the button is released gently and slowly. The procedure should be repeated five or six times. 3 Step No. Performance procedure 4- 5

15、- 6- 7- 8- Record the test message on the CA-3B Cartridge with the CO/B-8 Coder by following the message recording instructions in paragraph 2.2, steps 1 through 9. Record a test message o-i the remaining CA-3B Cartridge with the CO-3B Coder by following the message recording instructions given in p

16、aragraph 2.2.2, steps 1 through 8. To transmit the messages recorded with the CO/B-8 Coder- a.Attach the appropriate CA-3B Cartridge on the KE-8B Keyer locking pins. Wind the KE-8B Keyer spring with t he windup crank (fig. 1-4). b.Attach the KA-3 Keyer Adapter KEYER cable to the KE-8B Keyer connecto

17、r recep- tacle, and then turn the transmitter to ON. c.Refer to paragraph 2.3, steps 4, and 5 for instructions on transmitting the message. Repeat step 6 above to send the message recorded by the CO-3B Coder on the other CA-3B Cartridge. Disassemble all equipment, and return to the base station to c

18、heck the quality of the recorded messages. If incorrect messages are received and the defect cannot be remedied by the operator, return the AN/GRA-71 to maintenance for adjustment, or repair and adjustment. c.Premission Test Message Reception. (1) A typical setup for premission test message receptio

19、n is shown in figure 2-7. (2) Follow the operating instructions in TM 11-5820-357-10, to operate Radio Receiver R-390/URR, and TM 11-5895-373-12, TM 11-5835-228-12, TM 11- 5835-229-12, and TM 11-5835-227-12 to op- 4 erate Recorder-Reproducer Set, Sound AN/GSH-17 for premission test message reception

20、. 2.7 Operation With Radio Set AN/PRC-74A or AN/PRC-74B a.The AN/GRA-71 may be used with several radio sets to transmit pretaped messages. A typical example of a radio set configuration for transmission without the KA-3 Keyer Adapter is shown on figure 2-6. b.To operate the AN/PRC-74A or AN/PRC-74B

21、in coder-burst transmission, Cable Assembly, Special Purpose, Electrical CX-10239/PRC-74 or Cable Assembly, Power Electrical CX-11468/U can be used. This cable is connected between J1 on KE-8B Keyer and an AUDIO connector on the front panel of AN/ PRC-74A or AN/PRC-74B. The KW8B Keyer output is appl

22、ied directly to AN/PRC- 74A or AN/PRC, 74B through either a CX-10239/PRC-74 or a CX-11468/U. NOTE The encoded messages must be prerecorded on the CA-3B Cartridges recording tapes and be ready for use prior to turning on the AN/PRC-74A or AN/PRC74B for transmission to minimize the transmitter on-air

23、time during the coder-burst transmission. c.Connect the CA-B Cartridge containing the message to b e burst-transmitted to the KR4B Keyer locking pins. d.Turn on and tune the AN/PR-74A as instructed in TM 11-582059s12, or the AN/PRC-74B as instructed in TM 11-5820590-12-1. 5 Figure 2-6. Keying transm

24、itter without KA-3 Keyer Adapter. 6 Figure 2-7. Setup for receiving coder-burst transmission for a premission equipment check. 7 e.Set the KE-8B Keyer IDY switch to on. Local operating procedures establish the length of time that the IDY switch is left on. f.Turn the IDY switch off, and set the OFF-

25、ON switch on the KE-8B Keyer to ON. The encoded message will be transmitted automatically. g.Turn the AN/PRC-74A or AN/PRC-74B off immediately after the message has been transmitted. Page 52, paragraph 4.2.6. Delete and substitute: 4.2.6Cleaning. Clean the exterior surfaces only. The exterior surfac

26、es should be clean and free of dirt, grease, and fungus. The interior of the adapter, the coders, the keyer, and the magazines will be cleaned by a higher category of maintenance personnel. Paragraph 4.3.1. Delete subparagraphs b, c, and d, and substitute: b.Repeat the daily and weekly preventive ma

27、intenance checks and services as part of the organizational maintenance (para 4.2.4 through 4.2.6). Page 53, paragraph 4.3.2. Delete and substitute the following: 4.3.2Tools and Material Required. No tools are required for organizational maintenance of the AN/GRA-71. The materials required are liste

28、d below. a.Cleaning Compound (FSN 7930-395-9542). b.Cleaning cloth (soft, lintfree). Page 55, paragraph 4.3.5. Make the following changes: Delete sequence No. 1 in the chart in its entirety, and substitute the following note: NOTE: IF THE AN/GRA-71 COMPONENTS HAVE BEEN CLOSED IN THE CASE FOR SOME TI

29、ME, THE ELECTRICAL SWITCH CONTACTS COULD HAVE FORMED A DARK SULPHIDE, CAUSED BY THE SUL- 8 PHUR IN THE RUBBER CASE LINER. THIS COULD CAUSE POOR ELECTRICAL CONTACT AND THE RESULTANT DROPPING OF DASH OR DOT SIGNALS. THE ORGANIZATIONAL MAINTENANCE MAN SHOULD TURN THE AN/GRA-71 IN TO DIRECT SUPPORT PERI

30、ODICALLY TO HAVE THESE ELECTRICAL CONTACTS CLEANED. Change chart sequence numbers 2, 3, and 4 to read: 1, 2, and 3, respectively. 9 Page 73, appendix I (as changed by C 1, 24 Jun 66). Delete and substitute: APPENDIX A REFERENCES Following is a list of applicable references that should be available t

31、o the operator and organizational maintenance personnel of Coder-Burst Transmission Group AN/GRA-71: DA Pam 310-4Index of Technical Manu- als, Technical Bulletins, Supply Manuals (types 7, 8, and 9), Supply Bul- letins, and Lubrication Orders. DA Pam 310-7U.S. Army Equipment In- dex of Modification

32、Work Orders. SB 38-100Preservation, Packaging, Packing and Marking Materials, Supplies, and Equipment Used By the Army. SM 11-4-5180-R09Tool Kit, Radio Repair TK-115/G. TB 746-10Field Instructions for Painting and Preserving Electronics Command Equipment. TM 11-5820-357-10Operators Manual: Radio Rec

33、eiver R-390/URR. A-1 TM 11-5820-474-14Organizational, DS, and GS Maintenance Manu- al: Radio Set AN/GRC- 109. TM 11-5820-590-12Operator and Organiza- tional Maintenance Man- ual Including Repair Parts and Special Tool Lists: Radio Sets AN/ PRC-74 and AN/PRC- 74A and Power Supply PP-4514/PRC-74. TM 1

34、1-5820-590-12-1Operator and Organiza- tional Maintenance Man- ual Including Repair Parts and Special Tool Lists: Radio Set AN/ PRC-74B and Power Supply PP-4514/PRC- 74. TM 11-5835-227-12Organizational Mainte- nance Manual: Recorder- Reproducer Set, Sound AN/GSH-17. TM 11-5835-228-12Organizational Ma

35、inte- nance Manual: Recorder- Reproducer, Sound RD- 265/GR. TM 11-5835-229-12Organizational Mainte- nance Manual: Repro- ducer, Sound RP-138/ GR. A-2 TM 11-5895-373-12Operator and Organiza- tional Maintenance Man- ual: Converter, Frequen- cy, Electronic CV-1716/ GR. TM 38-750Army Equipment Record Pr

36、ocedures. A-3 APPENDIX B BASIC ISSUE ITEMS Section I. INTRODUCTION B-1.Scope This appendix lists items comprising an operable equipment and those required for installation, operation, or operators maintenance for Coder-Burst Transmission Group AN/GRA-71. B-2.Explanation of Columns The following is a

37、 list of explanations of columns in section II. a.Source, Maintenance, and Recoverability Codes (SMR) Column. Not used. b.Federal Stock Number Column. This column indicates the Federal stock number for the item. c.Description Column. This column includes the Federal item name and any additional desc

38、ription of the item which may be required. A part number or the reference number is followed by the applicable five-digit Federal supply code for manufacturers. Usable on code column is not used. d.Unit of Measure Column The unit used as a basis of measure (e.g., ea, pr, ft, yd, etc.) is given in th

39、is column e.Quantity Incorporated in Unit Column. The total quantity of the item used in the equipment is given in this column. B-1 f.Quantity Furnished With Equipment Column. This column lists the quantity of the item supplied for initial operation of the equipment and/or the quantities authorized

40、to be kept on hand by the operator for maintenance of the equipment. g.Illustration Column. Not used. D-3.Federal Supply Code. This paragraph lists the Federal supply code with the associated manufacturers name. Code numberManufacturers name 80063-Army Electronics Command. B-2 SECTION II. BASIC ISSU

41、E ITEMS (1) SMR CODE (2) FEDERAL STOCK NUMBER (3) DESCRIPTION USABLE ON Reference Number 80063 (This item is nonexpendable) TECHNICAL MANUAL TM 11-5835-224-12 Requisition through pinpoint account number if assigned; otherwise through nearest Adjutant General facility. A quantity of one technical man

42、ual is packed with each equipment. Where a valid need exists, additional copies may be requisitioned and kept on hand. NO PART AUTHORIZED OPERATOR/CREW NO ACCESSORIES, TOOLS OR TEST EQUIPMENT ARE TO BE ISSUED WITH THIS EQUIPMENT NO BASIC ISSUE ITEMS ARE MOUNTED IN OR ON THE EQUIPMENT ea11 B-3 APPEND

43、IX C MAINTENANCE ALLOCATION Section I. INTRODUCTION C-1.General This appendix provides a summary of the maintenance operations covered in the equipment literature for Coder-Burst Transmission Group AN/GRA-71. It authorizes categories of maintenance for specific maintenance functions on repairable it

44、ems and components and the tools and equipment required to perform each function. This appendix may be used as an aid in planning maintenance operations. C-2.Explanation of Format for Maintenance Allocation Chart a.Group Number. Group numbers correspond to the reference designation prefix assigned i

45、n accordance with ASA Y32.16, Electrical and Electronics Reference Designations. They indicate the relation of listed items to the next higher assembly. b.Component Assembly Nomenclature. This column lists the item names of component units, assemblies, subassemblies, and modules on which maintenance

46、 is authorized. c.Maintenance Function. This column indicates the maintenance category at which performance of the specific maintenance function is authorized. Authorization to perform a function at any category C-1 also includes authorization to perform that function at higher categories. The codes

47、 used represent the various maintenance categories as follows: CodeMaintenance category C- -Operator/crew. O- -Organizational maintenance. F- -Direct support maintenance. H- -General support maintenance. D- -Depot maintenance. d.Tools and Equipment. The numbers appearing in this column refer to spec

48、ific tools and equipment which are identified by these numbers in section III. e.Remarks. Self-explanatory. C-3. Explanation of Format for Tool and Test Equipment Requirements The columns in the tool and test equipment requirements chart are as follows: a.Tools and Equipment. The numbers in this column coincide with the numbers used in the tools and equipment column of the MAC. The numbers indicate the applicable tool for the maintenance function. b.Maintenance Category. The codes in this column indicate the maintenance category normally allocated the facility. c.Nomenclature. This