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ADMV1013 Recommended for New Designs
The ADMV1013 is a wideband, microwave upconverter optimized for point to point microwave radio designs operating in the 24 GHz to 44 GHz radio frequency...
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ADMV1013 LO spurs optimization

		
	
				

			

									
					    MuhammadAliGhafoor
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on May 28, 2025 
				
			
			
		
    
		
		                    	    
    
        	    
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                The user is experiencing in-band spurs (3*LO, 4*LO, 5*LO) with the ADMV1013 and seeks to suppress them. The final answer indicates that reducing LO power can lower spurs but increases output noise, and reducing RF input power results in a dB-for-dB spur reduction with no dBc gain. No specific configuration options are available for spur reduction.
                                    
    
                    
    
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    Category: Hardware
    
    		        		            		    
    Product Number:  ADMV1013S  
    
    		        		    		    
    
		    		    
		    			
    
			    
    Hello,
    

    I am using ADMV1013 and following spurs are falling in-band as per my freq plan and I want to suppress them as much as possible. Could you please provide best algorithm to adjust register settings for co-optimising these spurs:
    

      

    • 3*LO
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    • 4*LO
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    • 5*LO
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    Thanks,
    

    Ali
    
			
    
			
									    
    
			        
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    				changed the subject to include IC name
    
[edited by: MuhammadAliGhafoor at 10:43 AM (GMT -4) on 28 May 2025]
				
    
						
		                             
                        

    
    
                                            
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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Jun 5, 2025 8:44 AM
            
            
						
			            		
      
		
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      Hi Ali,
      

      There is no configuration option for reducing the spurs. When the LO is applied to the part, it is amplified which increases its harmonic content. Backing off the LO power will at some point cause the harmonic spurs to reduce but with that comes higher output noise. You can also reduce the RF input power to the part but any spur reduction that results from this will be dB-for-dB with the input power, so no dBc gain.
      

      Eamon
      

      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
						
				
				
				
		
		
      
			
		
      
	
      

      

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