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RF Overload GPIO



		

			

									
					    dwd_pete
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on May 6, 2019 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Hello,
    

    

    I am looking for a way to monitor whether or not my AD9371's RX1 input is saturated in real time via GPIO. I am planning on leaving the device in AGC mode and I want it to output a GPIO if it ever reaches the condition where it cannot turn up the attenuation sufficiently to not be overloaded (i.e., it's already at the gain index corresponding to maximum attenuation).
    

    

    I have the following questions:
    

    1. Which GPIO is the one I should be monitoring? Looking at UG-992 Table 142 (on page 192) it looks like I have several options. Is index 0x02, bit 4 ("RX1: Digital Saturation") the correct bit I should be monitoring?
    

    2. How can I enable this bit to be output on a certain GPIO (say GPIO_0)? I'm having trouble following the steps laid out in the UG.
    

    

    Thanks in advance for the help!
    
									
			        
		
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	















    
	
    
	
    
					



			


				
	









	
      
	

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      •  Analog Employees  
      
            
			                            
                        
                on May 8, 2019 9:11 AM
            
            
					
      
	
      

		
		
      
					
      1. You can make use of "Rx1: APD upper threshold exceeded" from the monitor output signals,
      

       
      

       
      

      

      2. From GUI you can configure as below and test this,
      

       
      

      Or
      

      You can enable this using below python script,
      

      ############################################################
      # Setup GPIO #
      ############################################################
      Link.Mykonos.setupGpio(64, Mykonos.GPIO_MODE.GPIO_MONITOR_MODE, Mykonos.GPIO_MODE.GPIO_MONITOR_MODE, Mykonos.GPIO_MODE.GPIO_MONITOR_MODE, Mykonos.GPIO_MODE.GPIO_MONITOR_MODE, Mykonos.GPIO_MODE.GPIO_MONITOR_MODE)
      Link.Mykonos.setGpioMonitorOut(2, 64)
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
						
						
				
				
		
		
      
			
		
      
	
      

      

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