nonresident training course - Historic Naval Ships Association

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simulated tracking and tactical situations that resemble actual operations. Data extracted during these simulated exercises can be used to verify the accuracy of operator tracking and system operation. The VSS is a computer-controlled device capable of generating antenna position data and triggers (sweep data), and radar video signals including simulated tracks, IFF/SIF, receiver noise, and sea clutter. Only the generation of video signals may be computer controlled; all other VSS functions are controlled from the VSS front panel, shown in figure 3-24. Radar Sweep Simulation The VSS can generate its own antenna position data or use a ship’s radar as a source. If a ship’s radar is used, the LIVE RADAR SOURCE switches are used to select the source radar and video level. The VSS then receives antenna position data and triggers from that radar’s RAC via the RDDS. The antenna position data (digital azimuth) and triggers are used to determine the generation times for video signals. The VSS contains its own synchro assembly, which generates synchro azimuth and triggers to the VSS RAC. The output of the VSS RAC is in turn fed back to the VSS via the RDDS for coincidence comparisons. The VSS simulated antenna rotation (RPM) and timing signals are controlled from the SIMULATED RADAR switches. To activate the servo assembly, both the E-REF and ANTENNA switches must be on. Radar Video Simulation The VSS receives video control data from the computer in message form. The output data defines the simulated video azimuth (bearing), range, and intensity. The VSS stores the output data in its track storage and compares the data with the digital azimuth and sweep data received from the RDDS. When the simulated video data and the digital sweep data are coincident, the VSS generates the ordered video signals and transmits them to the RDDS. Console selection of the VSS radar and video level allows display of VSS video and sweep. The video output of the VSS is made up of three types of video: live video, live and simulated (mixed) video, and simulated video. The live video output is isolated from the simulator. The live and simulated output is made up of simulated tracks intermixed with live video passing through the VSS. Simulated video is made up of computer-generated video only. Manual control of the simulated video characteristics is provided by the SIMULATED VIDEO switches. These switches allow the generated video to display characteristics that are similar to live radar video. The VIDEO DURATION (µSEC) switch controls the intensity (pulse length) of the simulated video return. The sharpness of the return is controlled by the IF BANDWIDTH switch. The sector width of the return is controlled by the RADAR BEAMWIDTH DEGREES control. TEST MESSAGE GENERATOR (TMG) The test message generator (TMG), shown in figure 3-25, is used to generate simulated computer output data for testing and troubleshooting display equipments. Normally contained in the PANG cabinet, the TMG is removable for its testing and troubleshooting role. The TMG maybe connected to the equipment under test by a jumper cable. This permits greater freedom of action for maintenance personnel in troubleshooting individual devices, such as a PPI console. The TMG can simulate any desired computer output data message up to four data words in length. Coding of TMG data is controlled by word group switches on the TMG control panel. The TMG is capable of operating in five different modes. The mode selection allows for great flexibility when testing or troubleshooting the display suite equipment. Free Run Mode The free run mode of operation repeats an operator-selected four-word message approximately every 400 microseconds. In this mode, the TMG may be used with any display equipment. 3-20
Test Pattern Mode The test pattern mode of operation, used only when the TMG is installed in the PA cabinet, displays two symbols repeated every 90 degrees for a total of eight symbols. All the word designator bits and the TEST PATTERN switch must beset too btain this display. The test pattern is normally output to one group of consoles at a time. Output Data Request (ODR) Mode Figure 3-25.—Test message generator. milliseconds). The 20-cycle mode repeats the message 20 times a second (every 50 milliseconds). DISPLAY POFA/PEFT A tactical display system is a somewhat complicated combination of equipments. The sheer number of consoles (PPIs), radar distribution switchboards, radar azimuth converters, pulse amplifier/ symbol generators or PA/CIGARS or DCI/CIGARS tends to present a formidable maintenance task. The output data request (ODR) mode of operation generates one data word in response to each ODR received from the equipment undervest. ODR mode is used when testing the PA, VSS, or consoles with DCI. The 2/20 Cycles-Per-Second (CPS) Modes The 2/20 cycles-per-second modes are a variation of the free run mode. The two-cycle mode repeats up to a four-word message twice a second (every 500 One of the primary tools available to the maintenance technician is the display programmed operational functional appraisal (POFA) and on some classes of ships, the display peripheral equipment functional test (PEFT). Display POFA The display POFA grouping of tests is designed to be loaded and run in the computer in lieu of the operational program. Display POFA subtests are 3-21
Page 1 and 2:
NONRESIDENT TRAINING COURSE July 19
Page 3 and 4: PREFACE By enrolling in this self-s
Page 5 and 6: CONTENTS CHAPTER PAGE APPENDIX 1. B
Page 7: PASS/FAIL ASSIGNMENT PROCEDURES If
Page 11 and 12: CHAPTER 1 BASIC DISPLAY DEVICES AND
Page 13 and 14: voltage of the control grid varies
Page 15 and 16: Figure 1-4.—Noninter1aced scan of
Page 17 and 18: DISPLAYING RADAR SWEEP, VIDEO, AND
Page 19 and 20: Figure 1-8.—The AN-UYQ-21(V) symb
Page 21 and 22: Figure 1-10.—Development of an an
Page 23 and 24: zero, one, two, or three grid point
Page 25: two major types of deflection syste
Page 28 and 29: horizontal and vertical timing sign
Page 30 and 31: Liquid crystals have been used for
Page 32 and 33: . . . sticking, the key can be remo
Page 35 and 36: CHAPTER 3 THE DATA DISPLAY GROUP AN
Page 37 and 38: Figure 3-1.—The AN/UYA-4(V) data
Page 39 and 40: channel. Each of the ship’s senso
Page 41 and 42: Figure 3-7—The input data word fo
Page 43 and 44: Figure 3-12.—The 48-label readout
Page 45 and 46: CDS computer. Display consoles in t
Page 47 and 48: Figure 3-16.—PPI console control
Page 49 and 50: Figure 3-19.—A PPI equipped with
Page 51 and 52: Figure 3-22.—A PPI console commun
Page 53: DISPLAY SYSTEM SIMULATION AND TESTI
Page 57 and 58: Figure 3-26.—An electronic plug-i
Page 59 and 60: CHAPTER 4 THE COMPUTER DISPLAY SET
Page 61 and 62: The Computer Display Set AN/UYQ-21(
Page 63 and 64: Figure 4-5.—Central data buffer (
Page 65 and 66: azimuth data are decoded for ∆Χ/
Page 67 and 68: amplifies the video signals to the
Page 69 and 70: from the graphics processor is rece
Page 71 and 72: Figure 4-14.—The basic display un
Page 73 and 74: trains from the RAC, counts the pul
Page 75 and 76: Figure 4-19.—A Display Control Co
Page 77 and 78: Monitor Deflection Function.— The
Page 79 and 80: the fiber-optic substrate of the li
Page 81 and 82: O-data receivers Input/output (I/O)
Page 83 and 84: DUAL TELEVISION SCAN CONVERTER (DUA
Page 85 and 86: APPENDIX I LIST OF ACRONYMS ACDS—
Page 87 and 88: APPENDIX II REFERENCES USED TO DEVE
Page 89: Detailed Functional Theory and Refe
Page 92 and 93: P Personal computers, 2-1 input dev
Page 95 and 96: ASSIGNMENT 1 Textbook Assignment:
Page 97 and 98: 1-17. Developing the display or pic
Page 99 and 100: 1-35. 1-36. 1-37. What geometric sh
Page 101 and 102: 1-52. 1-53. 1-54. 1-55. The RGB mon
Page 103 and 104: 1-70. Which of the following keys w
Page 105 and 106:
2-8. Which of the following signals
Page 107 and 108:
2-27. 2-28. 2-29. 2-30. 2-31. Displ
Page 109 and 110:
2-45. The console can provide the o
Page 111 and 112:
2-63. Which switch is used to contr
Page 113 and 114:
ASSIGNMENT 3 Textbook Assignment: T
Page 115 and 116:
The signs 3-16. of ∆Χ and ∆Υ
Page 117 and 118:
3-34. Which functional area compile
Page 119 and 120:
3-53. 3-54. 3-55. 3-56. 3-57. Which
Page 121:
3-71. 3-72. What equipment provides
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nonresident training course - Historic Naval Ships Association

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