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  UpdateHistory		  "UpdateHistoryNever"
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      BackgroundColor	      "cyan"
      DropShadow	      on
      FontName		      "Arial"
      FontSize		      14
      ShowPortLabels	      off
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      MaskHelp		      "Implemented using white noise into Zero-Order H"
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	Block {
	  BlockType		  RandomNumber
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	  Position		  [25, 40, 45, 60]
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	  Variance		  "1"
	  Seed			  "seed"
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	Block {
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	  Name			  "Zero-Order\nHold"
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	  SampleTime		  "Ts"
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    Block {
      BlockType		      StateSpace
      Name		      "HP filter"
      Position		      [435, 302, 490, 338]
      Orientation	      "left"
      BackgroundColor	      "cyan"
      DropShadow	      on
      FontName		      "Arial"
      FontSize		      14
      A			      "at"
      B			      "bt"
      C			      "ct"
      D			      "dt"
      X0		      "0"
      MaskType		      "buttap,lp2hp"
      MaskDescription	      "Analog Butterworth high pass filter.\n\n(Requir"
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      MaskHelp		      "Butterworth high pass filter using MATLAB's but"
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      MaskPromptString	      "Cutoff frequency (rad/sec):|Order"
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      MaskTunableValueString  "on,on"
      MaskCallbackString      "|"
      MaskEnableString	      "on,on"
      MaskVisibilityString    "on,on"
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      Zeros		      "z"
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