TM 11-6625-2611-12 TECHNICAL MANUAL OPERATOR’S AND ORGANIZATIONAL MAINTENANCE MANUAL TEST SET, TRANSPONDER SET AN/APM-305A HEADQUARTERS, DEPARTMENT OF THE ARMY JUNE 1978
TM 11-6625-2611-12 T ECHNICAL M A N U A L No. 11-6625-2611-12 HEADQUARTERS DEPARTMENT OF THE ARMY W As HINGTON , DC 5 June 1978 OPERATOR’S AND ORGANIZATIONAL MAINTENANCE MANUAL TEST SET, TRANSPONDER SET AN/APM-305A REPORTING OF ERRORS You can improve this manual by recommending improvements using DA Form 2028-2 (Test) Iocated in the back of the manual. Simply tear out the self-addressed form, fill it out as shown on the sample, fold it where shown, and drop it in the mail.
TM 11-6625-2611-12 Paragraph Page 4-1 4-1 4-1 4-1 4-2 4-2 4-5 4-12 CHAPTER 4 (cont.) Preventive Maintenanc e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...4-4 Preventive Maintenance and Service Periods... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...4-5 Daily Preventive Maintenance Checks and Service Periods . . . . . . . . . . . . . . . . . .
TM 11-6625-2611-12 CHAPTER 1 INTRODUCTION Section I. GENERAL 1-1. Scope This manual describes Test Set, Transponder Set AN/APM-305A (test set) (fig. 1-1) and covers its operation and organizational maintenance. It includes in- structions for installation, operation, inspection, selftesting, and preventive maintenance of the equipment. Also included in this manual is a maintenance allocation chart (app D).
Cover Assy Test Set MX-9944/APM305A (152050) Test Set Transponder TS-3395 A/APM305 (152100) Attenuator, 30 dB (134645-2) Cable Assy, RF (Jumper) (139528) Attenuator, 15 dB (134645-1) Chart, Conversion RF (151944-1) TM 11-6625-2611-12 1 2 3 4 5 6 1-2 Figure 1-1.
TM 11-6625-2611-12 1-2. Indexes of Publications P4610.19C and DLAR 4500.15. a. DA Pam 310-4. Refer to the latest issue of DA Pam 310-4 to determine whether there are new editions, changes, or additional publications pertaining to the equipment. b. DA Pam 310-7. Refer to DA Pam 310-7 to determine whether there are modification work orders (MWO’S) pertaining to the equipment. 1-4.
TM 11-6625-2611-12 use position. Normally, the ground pin is connected to power ground. However, if the ground system of the transponder under test is other than the power ground, the ground pin is pivoted to the not-in-use position when the plug is inserted into the power receptacle. The overall length and weight of power cable assembly are listed in paragraph 1-12. d. Adapters.
TM 11-6625-2611-12 Parameter Signal Generator Fixed Frequency Output: Signal Generator Swept Frequency Output: Swept Frequency Markers: RF Power Output (Main or Aux) Fixed Frequency with pulse width of 0.5 to 0.8 µ sec Operation Limitations: Temperature Altitude ISLS Output Level: RF Input (Main or Aux) Demodulated Video: Qty 1 NSN 2 5935-00-665-6543 1 1 1 1 4 2 1 2 1 1 Parameter Description >05 volts 75 ohms 1030 MHz ±0.
TM 11-6625-2611-12 CHAPTER 2 SERVICE UPON RECEIPT AND INSTALLATION Section I. SERVICE UPON RECEIPT OF MATERIAL 2-1. Siting The installation site shall have conditions which meet the operating limitations characteristics described in paragraph 1-11. 2-2. Unpacking When packed for shipment, the test set is placed in a corrugated box. A typical shipping box and its contents are shown in figure 2-1. The outer corrugated box is 29 inches (73.66 cm) high, 18 3/4 inches (47.62 cm) deep, and 25 1/4 inches (64.
TM 11-6625-2611-12 Figure 2-1. Packaging diagram 2-3. Checking Unpacked Equipment a. Inspect the equipment for damage incurred during shipment. If the equipment has been damaged, report the damage on DD Form 6 (para 1-3). b. Check the equipment against the component listing and the packing slip to see if the shipment is complete. Report all discrepancies in accordance with the instructions in TM 38-750.
TM 11-6625-2611-12 Section IL INSTALLATION INSTRUCTIONS 2-4. Tools, Test Equipment, and Materials Required for Installation place other equipment within 1 inch of either side of the test set to allow for adequate cooling. An oscilloscope only is required for installation, to view output wave forms of test set. 2-7. Interconnections 2-5. Assembly of Equipment secured to the test set by four latches, two on each side. The test set is shipped assembled and ready for operation.
TM 11-6625-2611-12 Figure 2-2. Typical bench test setup.
TM 11-6625-2611-12 2-10. Additional Test Capabilities In addition to performing the measurements listed in paragraph 2-9, the test set can be used in a number of test setup configurations to test other transponder capabilities which include, but are not limited to, the following a. AOC reaction time b. Internal suppression-ISLS c. Preselector alignment d. Echo suppression e. ISLS gate characteristics f. ISLS rate limit Section IV. CIRCUIT ALIGNMENT 2-11.
TM 11-6625-2611-12 Figure 2-3. Test set operator’8 checklist test setup Table 2-3. Tent Set Preliminary Control Settings (Continued) Table 2-2. Oscilloscope Control Settings Controls ON (applies ac power to oscilloscope) Adjust horizontal position for best HORIZONTAL POSITION display HORIZONTAL MAGNIFIER X1 ALT DISPLAY 1 A and B VOLTS/DIV X1 MAGNIFIER o MAIN TRIGGER LEVEL EXT + 10/ EXT/INT/LINE EXT 10 µ sec MAIN TIME/DIV SWEEP DISPLAY SWITCH MAIN AUTO SWEEP MODE 0.00 DIV DELAY POWER (switch) Table 2-3.
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TM 11-6625-2611-12 CHAPTER 3 OPERATING INSTRUCTIONS Section I. CONTROLS AND INSTRUMENTS 3-1. Damage From Improper Settings There are no control settings or combination of control settings which will damage the equipment or create a hazard to personnel. 3-2. Operator’s Controls Table 3-1 identifies and describes the function of controls, indicators, and connectors of the test set. Figure 3-1 illustrates and locates all controls, indicators, and connectors.
TM 11-6625-2611-12 3-2 Figure 3-1.
TM 11-6625-2611-12 Figure 3-2. Low power measurement calibration chart Section Il. OPERATION UNDER USUAL CONDITIONS AND PREPARATION FOR MOVEMENT 3-3. Preliminary Starting Procedure No special starting procedures are necessary other than setting POWER ON/OFF switch to ON. 3-4. Procedure for Shutdown No special stopping procedures are necessary other than setting POWER ON/OFF switch to OFF. 3-5. Preparation for Movement a.
TM 11-6625-2611-12 Figure 3-1 index No 5 6 7 8 9 10 11 3-4 Table 3-1. Operator’s Controls, Indicators, and Connectors (Continued) Control, indicatar, Function or connector tion between mode 3/A challenges. Function Switch position Neither scope trigger nor challenge video is OFF delayed. Scope trigger occurs 27 µ sec before P3 pulse when CHAL MODE SELECT switch is set to 1, 2, 3/A, TEST, or DUAL 3/A.
TM 11-6625-2611-12 Table 3-1. Operator’s Controls, Indicators, and Connectors (Continued) Figure 3-1 index No.
TM 11-6625-2611-12 Table 3-1. Operator's Controls, Indicators, and Connectors (Continued) Control, indicator, or connector Figure 9-1 index No. Function Mode 2 challenge video Mode 3/A challenge video Mode C challenge video C TEST Test mode challenge video Mode 4 maintenance word A challenge video. Also 4A enables operation of functions to MODE 4 connector. Mode 4 maintenance word B challenge video. Also 4B enables operation of functions to MODE 4 connector.
TM 11-6625-2611-12 Table 3-1. Operator’s Controls, Indicators and Connectors (Continued) Figure 3-1 index No. Control, indicatar, or con nectar 26 AU X ATTEN control 27 LOW PWR IN jack 28 RF IN/OUT MAIN jack 29 RF IN/OUT DEMOD switch 30 RF IN/OUT AUX jack 31 SIG GEN FCTN switch 32 BIT (MOM) switch 33 CHAL AUX MOD DLY control 34 MODE 4 connector 35 AUX TRIG OUT 36 AUX TRIG ON/OFF switch 37 SUPPR OUT jack Function MODE 4 connector.
TM 11-6625-2611-12 Table 3-1. Operator’s Controls, Indicators, and Connectors (Continued) Control, indicator, or connector Figure 3-1 index No. 3-8 38 SUPPR switch 39 40 PRF SELECT switch POWER DC FAULT indicator 41 POWER 1 AMP fuse holder 42 43 GND TIMING MARKERS Function Toggle switch used to control suppression signal when in ON position, applies suppression signal to SUPPR OUT jack; when in OFF position, suppression signal is not applied to jack.
TM 11-6625-2611-12 CHAPTER 4 OPERATOR/CREW MAINTENANCE INSTRUCTIONS 4-1. Tools and Equipment Record all deficiencies together with the corrective action taken on forms per TM 38-750. Instructions for performing the required checks are identified as periodic checks. The following test equipment is required for organizational maintenance: a. Multimeter AN/USM-223. b. Oscilloscope AN/USM-281A or oscilloscope AN/USM-281C. C . Tools.
TM 11-6625-2611-12 4-2
Figure 4-1.
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TM 11-6625-2611-12 c. Additional Equipment. The additional equipment required to perform the quarterly test procedure is Oscilloscope AN/USM-281(*). d. Oscilloscope 7ime Differential (Delay) Measurement Procedure.
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TM 11-6625-2611-12 CHAPTER 5 ORGANIZATIONAL MAINTENANCE INSTRUCTIONS 5-1. General Maintenance of the test set consists of cleaning the exterior, replacing lamps and fuses, and minor cable repair. 5-2. Cleaning WARNING The fumes of TRICHLOROETHANE are toxic. Provide thorough ventilation whenever it is used; avoid prolonged or repeated breathing of vapor.
TM 11-6625-2611-12 CAUTION Make sure ball plunger housing does not scrape front panel when knob is rotated. h. Insert flat-bladed screwdriver into hold in center of knob and without disturbing position of knob, adjust control until leading edge of first challenge pulse occurs 0.2 µ sec after position referenced in d above. i. Retighten setscrews. j.
TM 11-6625-2611-12 APPENDIX A REFERENCES DA Pam 310-4 DA Pam 310-7 TB 43-0118 TM 11-6625-654-14 TM 11-6625-1703-15 TM 38-750 TM 740-90-1 TM 750-244-2 Index of Technical Publications: Technical Manuals, Technical Bulletins, Supply Manuals (Types 7, 8, and 9), Supply Bulletins, and Lubrication Orders U. S. Army Equipment Index of Modification Work Orders Field Instructions for Painting and Preserving Electronics Command Equipment Including Camouflage Pattern Painting of Electrical Equipment Shelters.
TM 11-6625-2611-12 APPENDIX B COMPONENTS OF END ITEM LIST Section I. INTRODUCTION B-1. Scope This appendix lists integral components of the AN/APM-305A to help you inventory items required for safe and efficient operation. B-2. General This Components of End Item List is divided into the following sections: a Section II. Integral Components of the End Item These items, when assembled, comprise the AN/APM-305A and must accompany it whenever it is transferred or turned in.
TM 11-6625-2611-12 SECTION 152050 152100 134645-2 139528 134645-1 151944-1 UG-565 A/U 134646-1 134646-2 139527 139526 139529 B-2 II INTEGRAL COMPONENTS OF END ITEM
TM 11-6625-2611-12 APPENDIX D MAINTENANCE ALLOCATION Section I. INTRODUCTION D-1. General This appendix provides a summary of the maintenance operations for the AN/APM-305A. It authorizes categories of maintenance for specific maintenance functions on repairable items and components and the tools and equipment required to perform each function. This appendix may be used as an aid in planning maintenance operations. D-2.
TM 11-6625-2611-12 allocation chart. Subcolumns of column 4 are as follows: C - Operator/Crew O - Organizational F - Direct Support H - General Support D - Depot e. Column 5, Tools and Equipment. Column 5 specifies by code, those common tool sets (not individual tools) and special tools, test, and support equipment required to perform the designated function. f. Column 6, Remarks.
TM 11-6625-2611-12 SECTION II MAINTENANCE ALLOCATION CHART FOR TEST SET, TRANSPONDER SET AN/APM-305A D-3
TM 11-6625-2611-12 SECTION II MAINTENANCE ALLOCATION CHART FOR D-4
TM SECTION III TOOL AND TEST EQUIPMENT REQUIREMENTS FOR ‘TRANSPONDER D-5 SETt TEST’ SET AN/APM-305A 11-6625-2611-12
TM 11-6625-2611-12 SECTION IV.
TM 11-6625-2611-12 APPENDIX E EXPENDABLE SUPPLIES AND MATERIALS LIST Section I. INTRODUCTION F—Direct Support Maintenance E-1. Scope This appendix lists expendable supplies and materials H-General Support Maintenance you will need to operate and maintain the c. Column 3-National Stock Number. This is the National stock number assigned to the item; use it to AN/APM-305A. These items are authorized to you by CTA 50-970, Expendable Items (Except Medical, Class request or requisition the item.
TM 11-6625-2611-12 SECTION II 5350-00-235-0124 8305-00-267-3015 8020-00-260-1306 6625-00-205-6513 E-2 EXPENDABLE SUPPLIES AND MATERIALS LIST
By Order of the Secretary of the Army: BERNARD W. ROGERS General, United States Army Chief of Stuff Official: J. C.
PIN : 034239-000
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