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AD9361 Recommended for New Designs
The AD9361 is a high performance, highly integrated radio frequency (RF) Agile Transceiverâ„¢ designed for use in 3G and 4G base station applications....
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AD9361 on Analog.com

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Adalm Pluto Frequency Hopping

		
	
				

			

									
					    albs975
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Mar 4, 2026 
				
			
			
		
    
		
		                     
				
        		
    
		    
		    		    
    
		      		            		        
    Category: Hardware
    
    		        		            		    
    Product Number:  AD9361  
    
    		        		    		    
    
		    		    
		    			
    
			    
    I'm using ANTSDR E200 which uses a Pluto IIO driver. I want to apply a frequency hopping application. I want to quickly retune 8 different 250mhz apart LOs with a 2.5mhz tune bandwith for each. My goal is compose a big spectrum with a single receiver. Is it possible and how to do it? Thanks.
    
			
    
			
									
		                             
                        

    
    
                                            
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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Mar 5, 2026 1:58 AM
            
            
						
			            		
      
		
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      HI  ,
      

      

      

      Fast frequency hopping is possible, but only within the tuning speed limits of the AD9361 LO synthesizer — and it depends heavily on how you control the hops.
      

      AD9361 IBW maximum limit is 56MHz. And your requirement is 250MHz which is beyond 56MHz from LO. This is not in the same Band and it requires LO change and recalibration. This may not be fast enough.
      

      

      So, we would recommend using AD9361 Fastlock profiles mode. Fastlock allows you to: Precompute LO calibration parameters for each frequency, Store them in registers and Switch between them instantly. We call this as “Instant Frequency Hopping”.
      

      


      

      

      Regards,
      

      SJ
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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                on Mar 5, 2026 2:22 AM
            
            
						
			            		
        
		
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        Thank you very much, I will look into that. After implementing the hopping procedure, I am considering composing a wider ‘stitched’ spectrum. The idea is to capture 2.5 MHz FFT snapshots around each channel center and combine them into a single display (8 × 2.5 MHz) across the ~2 GHz span, so that I can observe the activity in all channels simultaneously in a pseudo-synchronous way.
        
			
        

		
			
	      

		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

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