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ADRV9009 Recommended for New Designs
The ADRV9009 is a highly integrated, radio frequency (RF), agile transceiver offering dual transmitters and receivers, integrated synthesizers, and digital...
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ADRV9009 on Analog.com

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HMC7044 Recommended for New Designs
The HMC7044 is a high performance, dual-loop, integer-N jitter attenuator capable of performing reference selection and generation of ultralow phase noise...
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HMC7044 on Analog.com

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ADRV9009 receiver spur without any input



		

			

									
					    Ganesh_Goli
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Apr 4, 2024 
				
			
			
		
    

				
		
    
		    		    
		    
		    		      		            		        
    Category: Software
    
    		        		            		    
    Product Number:  FMCOMMS8_ZCU102 
    
    		        		        		        
    Software Version: Vivado 2021.2
    
    		    		    	
			
    Hi Team,
    

                       
    

    

                   I am using FMCOMMS8_ZCU102 setup. I tuned LO to 1999MHz using Frequency Hopping Mode. Without providing input frequency, I have plotted the receiver noise of FMCOMMS8 and observed a spur at 2098MHz with power 10 dB above noise floor in receiver 2 (RX2) and receiver 4(RX4) only. While in RX1 and RX3 , this 2098MHz peak was not there. In my application I'm taking four receivers output , so that without any input, i'm a observing a peak at output. This is scenario is not acceptable in our application. Can you please guide us how to resolve this issue in channel 2and channel 4.
    

    Here I'm attaching the results for your reference:

    Noise Plot without any input:
    channel 2

     

    channel 1

     


    With Input frequency 2064MHz

    channel 1

     

    channel 2

     


     
    

    

    Thanks & Regards
    

    Goli Ganesh
    
									
			        
		
    

				
						
        

    
    Tags: 
                                            
                 Clock Generation Devices
                
                                                    
                 adc
                
                                                    
                 Clock Generation and Distribution
                
                                                    
                 hmc7044
                
                                                    
                 Vivado 2021.2
                
                                        
                                            
                
                
                                        
                                            
                
                
                                        
                                            
                
                
                                        
                                            
                
                
                                        
                                            
                
                
                                        
                                            
                
                
                                
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													0
							
			
				
									
							        
			
			
			
      •  Analog Employees  
      
            
						
                            
            
            				
            
                on May 3, 2024 11:39 AM
            
            
												
						in reply to Ganesh_Goli
					
									
      
	
      

		
		
      
					
      Do you have LNA in your setup ?
      

      Do you have any of the  Tx enabled , can you disable all the Tx channels and unused Rx channels and see if you still see spurs ?
      

      As you are using 200MHz profile , can you go with a 100MHz profile and test once ?
      

      Can you try testing with a different RX LO and see if the same exact spurs are seen ?
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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