Quantcast LINK-11  FUNDAMENTALS

 
  
 
After completing this chapter you should be able to: Describe the composition of a typical Link-11 system. Describe the operation of the Link-11 transmission and receive cycles. Describe the six operating modes of the Link-11 system. Describe the function of the Link-11 encryption (security) device. Describe the audio tones generated by the Link-11 Data Terminal Set. Describe the word formats used to transmit Link-11 tactical data. Describe  the  message  formats  used  in  the  various  Link-11  operating modes. Describe the operation of the Link-11 Data Terminal Set. LINK-11  FUNDAMENTALS To   monitor   the   operation   of   and   perform maintenance   on   the   Link-11   system,   you   must understand  how  the  different  pieces  of  equipment interact with each other. Let’s take a look at a basic Link-11 system. LINK-11  SYSTEM  OVERVIEW A   typical   shipboard   Link-11   communications system  (figure  2-2)  consists  of  the  following components: the   CDS   digital   computer,   a cryptographic device, the Link-11 data terminal set, the  communications  switchboard,  and  the  HF  or  UHF radio   set   transceivers   (transmitter/receiver),   an antenna coupler, and an antenna. The data terminal set is the center of the Link-11 system and is covered in  detail  later  in  this  chapter.  The  communications switchboard is used to select the desired HF or UHF transceiver.  An  external  frequency  standard  is  also part   of   many   Link-11   systems.   Additionally,   the Shipboard  Gridlock  System  (SGS) is installed on many  ships.  On  SGS-equipped  ships,  an  AN/UYK-20 is placed in the line between the CDS computer and the  crypto  device. Figure  2-2.—The  Link-11  communications  system. 2-2

 


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