		  

    :

Attenuator	
 
* Att	
	    .
* Calc
	      R26  R27  
	    Re,   
	    Att.
* R26  R27
	 ,   .

LP filter section	  LP ()
  Lowpass
* Filter order	 
	     lowpass .
* Cutoff	
	    lowpass
* Calc
	      L21, C22, L23  C24 
	     ; 
	 ,    Re.  , 
	    ,  N=4,   
	   .    
	   Butterworth ().
* L21, C22, L23, C24
	,    lowpass

Notch section	 
* R25  L25  C25
	,  ,    
	   ,  
	      .

Zobel 
 
* Calc
	      R28  C28  
	    Re  Le,   
	 .
* R28  C28
	,   zobel ()

* Disconnect	
	  ,   
	       
	 10^12 .