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	}
	Block {
	  BlockType		  Outport
	  Name			  "out_1"
	  Position		  [675, 70, 695, 90]
	  ShowName		  off
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	  InitialOutput		  "0"
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	  SrcBlock		  "in_1"
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	  DstBlock		  "Switch 3"
	  DstPort		  1
	}
	Line {
	  SrcBlock		  "Switch 1"
	  SrcPort		  1
	  Points		  [20, 0; 0, 30]
	  DstBlock		  "Echo\nCanceler"
	  DstPort		  1
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	Line {
	  SrcBlock		  "Butterworth\nLP Filter"
	  SrcPort		  1
	  DstBlock		  "Sum1"
	  DstPort		  2
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	Line {
	  SrcBlock		  "Echo\nCanceler"
	  SrcPort		  2
	  Points		  [75, 0; 0, 55]
	  DstBlock		  "Sum1"
	  DstPort		  1
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	Line {
	  SrcBlock		  "Echo\nCanceler"
	  SrcPort		  1
	  DstBlock		  "Digital-TDMA\nmux1"
	  DstPort		  1
	}
	Line {
	  SrcBlock		  "Digital-TDMA\nmux1"
	  SrcPort		  1
	  DstBlock		  "Echo Canceler\nCoef. view"
	  DstPort		  1
	}
	Line {
	  SrcBlock		  "Sum"
	  SrcPort		  1
	  DstBlock		  "Butterworth\nLP Filter"
	  DstPort		  1
	}
	Line {
	  SrcBlock		  "in_2"
	  SrcPort		  1
	  DstBlock		  "Switch 2"
	  DstPort		  1
	}
	Line {
	  SrcBlock		  "Equalizer"
	  SrcPort		  1
	  Points		  [5, 0; 0, -45; -65, 0]
	  DstBlock		  "Unit Delay"
	  DstPort		  1
	}
	Line {
	  SrcBlock		  "Switch 2"
	  SrcPort		  1
	  Points		  [15, 0; 0, -65]
	  DstBlock		  "Sum"
	  DstPort		  2
	}
	Line {
	  SrcBlock		  "Switch 3"
	  SrcPort		  1
	  Points		  [20, 0; 0, -50]
	  DstBlock		  "Equalizer"
	  DstPort		  2
	}
	Line {
	  SrcBlock		  "Sum1"
	  SrcPort		  1
	  Points		  [55, 0]
	  Branch {
	    DstBlock		    "Equalizer"
	    DstPort		    1
	  }
	  Branch {
	    Points		    [0, -160; -360, 0; 0, 30]
	    DstBlock		    "Switch 1"
	    DstPort		    1
	  }
	}
	Line {
	  SrcBlock		  "Step Input"
	  SrcPort		  1
	  Points		  [15, 0]
	  Branch {
	    Points		    [0, -225]
	    DstBlock		    "Switch 1"
	    DstPort		    2
	  }
	  Branch {
	    Points		    [85, 0; 0, 0]
	    Branch {
	      DstBlock		      "Switch 2"
	      DstPort		      2
	    }
	    Branch {
	      Points		      [295, 0]
	      DstBlock		      "Switch 3"
	      DstPort		      2
	    }
	  }
	}
	Line {
	  SrcBlock		  "Filter1"
	  SrcPort		  1
	  DstBlock		  "Sum"
	  DstPort		  1
	}
	Line {
	  SrcBlock		  "Unit Delay"
	  SrcPort		  1
	  DstBlock		  "MASK demap"
	  DstPort		  1
	}
	Line {
	  SrcBlock		  "MASK demap"
	  SrcPort		  1
	  DstBlock		  "out_1"
	  DstPort		  1
	}
	Line {
	  SrcBlock		  "PAM\nSignal"
	  SrcPort		  1
	  Points		  [10, 0]
	  Branch {
	    DstBlock		    "Echo\nCanceler"
	    DstPort		    2
	  }
	  Branch {
	    DstBlock		    "Filter1"
	    DstPort		    1
	  }
	}
      }
    }
    Block {
      BlockType		      Scope
      Name		      "Scope"
      Ports		      [2]
      Position		      [370, 127, 400, 158]
      Floating		      off
      Location		      [641, 428, 1019, 735]
      Open		      on
      NumInputPorts	      "2"
      TickLabels	      "on"
      ZoomMode		      "on"
      List {
	ListType		AxesTitles
	axes1			"Received Data"
	axes2			"Transmit Data"
      }
      Grid		      "on"
      TimeRange		      "0.2"
      YMin		      "-0.5~-0.5"
      YMax		      "1.5~1.5"
      SaveToWorkspace	      off
      SaveName		      "ScopeData"
      DataFormat	      "Array"
      LimitDataPoints	      on
      MaxDataPoints	      "5000"
      Decimation	      "1"
      SampleInput	      off
      SampleTime	      "0"
    }
    Block {
      BlockType		      SubSystem
      Name		      "Transmitter"
      Ports		      [1, 1]
      Position		      [120, 117, 165, 173]
      ShowPortLabels	      on
      TreatAsAtomicUnit	      off
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      RTWFcnNameOpts	      "Auto"
      RTWFileNameOpts	      "Auto"
      System {
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	Location		[362, 143, 617, 266]
	Open			off
	ModelBrowserVisibility	off
	ModelBrowserWidth	200
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	PaperOrientation	"landscape"
	PaperPositionMode	"auto"
	PaperType		"usletter"
	PaperUnits		"inches"
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	AutoZoom		on
	Block {
	  BlockType		  Inport
	  Name			  "in_1"
	  Position		  [15, 60, 35, 80]
	  ShowName		  off
	  Port			  "1"
	  Interpolate		  on
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	Block {
	  BlockType		  Reference
	  Name			  "Raised cosine\nfilter"
	  Ports			  [1, 1]
	  Position		  [85, 48, 165, 92]
	  ShowName		  off
	  SourceBlock		  "com_filt/Raised cosine\nfilter"
	  SourceType		  "R-C filter"
	  td			  "0.0025"
	  ts			  "0.0005"
	  R			  ".15"
	  delay			  "3"
	  fil			  "'FIR'"
	  x			  "1"
	}
	Block {
	  BlockType		  Outport
	  Name			  "out_1"
	  Position		  [215, 60, 235, 80]
	  ShowName		  off
	  Port			  "1"
	  OutputWhenDisabled	  "held"
	  InitialOutput		  "0"
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	Line {
	  SrcBlock		  "in_1"
	  SrcPort		  1
	  DstBlock		  "Raised cosine\nfilter"
	  DstPort		  1
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	  SrcBlock		  "Raised cosine\nfilter"
	  SrcPort		  1
	  DstBlock		  "out_1"
	  DstPort		  1
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      }
    }
    Block {
      BlockType		      SubSystem
      Name		      "Utility2"
      Ports		      []
      Position		      [320, 221, 400, 265]
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    Block {
      BlockType		      SubSystem
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      Position		      [250, 225, 295, 266]
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      ShowName		      off
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	  BlockType		  SubSystem
	  Name			  "information"
	  Ports			  []
	  Position		  [465, 200, 510, 241]
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	  ShowPortLabels	  on
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	    AutoZoom		    on
	    Annotation {
	      Position		      [352, 87]
	      VerticalAlignment	      "top"
	      Text		      "The transmitting blocks has orientation"
" from left to right. The receiving blocks has orientation from right to left."
	    }
	    Annotation {
	      Position		      [337, 122]
	      VerticalAlignment	      "top"
	      Text		      "black+blue blocks => typical ANALOG com"
"munication system.                          \n\nblack+green blocks => minimum"
" configuration of a DIGITAL communication system.\n\nblack+green+red blocks ="
"> maximum configuration of a DIGITAL communication system.      "
	    }
	    Annotation {
	      Position		      [382, 47]
	      VerticalAlignment	      "top"
	      Text		      "This library contains transmitter and r"
"eceiver. The receiving part is almost reverse of the transmitting part. For a"
" clear\nrelationshipe, when a transmitter block is clicked, the function for "
"the receiving will also be shown up and vice verse.            "
	    }
	  }
	}
	Block {
	  BlockType		  SubSystem
	  Name			  "information1"
	  Ports			  []
	  Position		  [485, 220, 530, 261]
	  ForegroundColor	  "magenta"
	  ShowName		  off
	  ShowPortLabels	  on
	  TreatAsAtomicUnit	  off
	  RTWSystemCode		  "Auto"
	  RTWFcnNameOpts	  "Auto"
	  RTWFileNameOpts	  "Auto"
	  MaskDisplay		  "disp('?')"
	  MaskIconFrame		  on
	  MaskIconOpaque	  on
	  MaskIconRotate	  "none"
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	  System {
	    Name		    "information1"
	    Location		    [412, 193, 1196, 384]
	    Open		    off
	    ModelBrowserVisibility  off
	    ModelBrowserWidth	    200
	    ScreenColor		    "white"
	    PaperOrientation	    "landscape"
	    PaperPositionMode	    "auto"
	    PaperType		    "usletter"
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	    ZoomFactor		    "100"
	    AutoZoom		    on
	    Annotation {
	      Position		      [352, 87]
	      VerticalAlignment	      "top"
	      Text		      "The transmitting blocks has orientation"
" from left to right. The receiving blocks has orientation from right to left."
	    }
	    Annotation {
	      Position		      [337, 122]
	      VerticalAlignment	      "top"
	      Text		      "black+blue blocks => typical ANALOG com"
"munication system.                          \n\nblack+green blocks => minimum"
" configuration of a DIGITAL communication system.\n\nblack+green+red blocks ="
"> maximum configuration of a DIGITAL communication system.      "
	    }
	    Annotation {
	      Position		      [382, 47]
	      VerticalAlignment	      "top"
	      Text		      "This library contains transmitter and r"
"eceiver. The receiving part is almost reverse of the transmitting part. For a"
" clear\nrelationshipe, when a transmitter block is clicked, the function for "
"the receiving will also be shown up and vice verse.            "
	    }
	  }
	}
	Annotation {
	  Position		  [222, 92]
	  VerticalAlignment	  "top"
	  Text			  "This example uses trained initial data. If "
"you prefer to train the data\nyourself, set the Step time parameter in the St"
"ep input block in the\nReceiver subsystem to be 50."
	}
	Annotation {
	  Position		  [222, 32]
	  VerticalAlignment	  "top"
	  Text			  "This example simulates digital transmission"
" through a telephone line.\nA noise cancellation filter and an equalizer are "
"included in the\nsimulation example"
	}
	Annotation {
	  Position		  [207, 157]
	  VerticalAlignment	  "top"
	  Text			  "Design and original  implementation by Walt"
"er Chen.\nTexas Instrument\n13510 North central Expressway\nMail Stop 446\nDa"
"llas TX 75265 "
	}
      }
    }
    Line {
      SrcBlock		      "K-step\ndelay"
      SrcPort		      1
      Points		      [40, 0; 0, 35]
      DstBlock		      "Receiver"
      DstPort		      1
    }
    Line {
      SrcBlock		      "Transmitter"
      SrcPort		      1
      DstBlock		      "Channel"
      DstPort		      1
    }
    Line {
      SrcBlock		      "Channel"
      SrcPort		      1
      DstBlock		      "Receiver"
      DstPort		      2
    }
    Line {
      SrcBlock		      "PAM Signal"
      SrcPort		      1
      Points		      [0, 0; 25, 0]
      Branch {
	DstBlock		"Transmitter"
	DstPort			1
      }
      Branch {
	Points			[0, -60]
	DstBlock		"K-step\ndelay"
	DstPort			1
      }
    }
    Line {
      SrcBlock		      "PAM Signal"
      SrcPort		      2
      Points		      [40, 0; 0, 40]
      DstBlock		      "K-step\ndelay1"
      DstPort		      1
    }
    Line {
      SrcBlock		      "Receiver"
      SrcPort		      1
      DstBlock		      "Scope"
      DstPort		      1
    }
    Line {
      SrcBlock		      "K-step\ndelay1"
      SrcPort		      1
      Points		      [95, 0; 0, -60]
      DstBlock		      "Scope"
      DstPort		      2
    }
    Annotation {
      Position		      [247, 27]
      VerticalAlignment	      "top"
      ForegroundColor	      "red"
      Text		      "High-Bit-Rate Digital Subscriber Line"
      FontSize		      12
      FontWeight	      "bold"
    }
    Annotation {
      Position		      [215, 312]
      Text		      "Warning: This model is obsolete and may be remo"
"ved in the future."
      FontName		      "Arial"
      FontSize		      12
    }
  }
}