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Microcomputers - 14100_16
Tactical Support Systems

Fire Controlman Volume 03-Digital Data Systems
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Keyboard —Keyboards are input devices used to control operation of a computer. Printer   —Printers   are   output   devices   for producing printed material. Modem —Modems are optional components used  to  communicate  with  mainframes,  minicomputers, and microcomputers through existing phone lines. Mouse  —Another  optional  component  is  a mouse. A mouse is an input device used to highlight text,  move  the  cursor,  and  select  commands  and functions without using the keyboard. A mouse can be used  in  combination  with  a  keyboard  to  control computer operations. TOPIC 2—FUNCTIONAL OPERATION OF COMPUTERS At the heart of every data system is a computer. All digital  data  made  available  on  any  system  has  been processed by the computer. The computer oversees the operation of any data system. Through a coordinated series of interrupts, requests, and acknowledges, the computer  exchanges  data  with  other  computers, peripherals,  and  the  subsystems  required  for  that system. The signal flow between systems, subsystems, and equipment  is  all  coordinated  by  the  operational program  of  the  computer(s).  Exchange  of  signals between  the  systems,  subsystems,  and  equipment  is accomplished through a coordinated series of priorities where   interrupts,   requests,   and   acknowledges determine when the data will be exchanged. The type of data exchanged includes status signals, control signals,  and  data  words.  Interfacing  between  the computer(s)  and  other  systems,  subsystems,  and equipment  requires  some  type  of  cabling—standard shielded and unshielded cables, fiber-optic cables, and ribbon   cables,   and   their   associated   connectors. Methods of interfacing include parallel and serial data transfers. OPERATIONAL USES OF COMPUTERS You  may  have  the  opportunity  of  maintaining  three basic types of data systems: tactical, tactical support, and   nontactical.   all   three   rely   on   one   or   more computers  to  make  rapid  calculations  and  make information available. Tactical  Systems A computer is the heart of the Combat Direction System (CDS)/Naval Tactical Data System (NTDS), which is a subsystem of the ship’s combat system. CDS/NTDS  receives  data  from  ship’s  sensors  and  other ships  using  tactical  data  links.  The  CDS/NTDS  consists of high-speed digital computers, peripherals, displays, communication  links,  and  computer  programs.  The CDS/NTDS  hardware  is  divided  into  three  major equipment groups (subsystems) as follows: Data Processing Group Data Display Group Data Communications Group The data these subsystems generate and feed back to the data processing subsystem is stored, processed, and  distributed  by  the  operational  program.  The computer is part of the data processing group and coordinates the operations within CDS/NTDS and makes  the  information  available  to  other  major subsystems  within  combat  systems:  radar/IFF,  weapons (guns, missiles, and underwater), electronic warfare, and navigation. The CDS/NTDS is a real-time system. The type of computer used in a tactical data system is a mainframe   such   as   the   AN/UYK-7(V)   or AN/UYK43(V) computer. The number of computers used in a tactical data system depends on the class of ship and its configuration/setup. Figure 1-6 is a portion Figure  1-6.—Simplified  block  diagram  of  a  tactical  data system (CDS/NTDS). 1-7






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