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ADRV9002 Recommended for New Designs
The ADRV9002 is a highly integrated RF transceiver that has dual-channel transmitters, dual-channel receivers, integrated synthesizers, and digital signal...
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adrv9002 LO change is very slow

		
	
				

			

									
					    swie
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on May 17, 2021 
				
			
			
		
    
		
		                    	    
    
        	    
    Thread Summary
    
                The user is experiencing slow LO frequency changes (200ms) on the ADRV9002 eval board when using the sysfs interface. The final answer confirms that the PLL must re-lock and the device must be recalibrated, which cannot be disabled. Fast hopping is suggested as an alternative, but it is not yet supported in the Linux driver. The user should consider using the TES software or No-OS for faster LO changes, as these environments have specialized APIs and HDL for this purpose.
                        	    
    
                
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    I am using the adrv9002 eval board.
    All seems to be working correctly.
    

    However, changing the LO seems to take about 200mS which is quite slow.
    

    I am changing this through 
    

    out_altvoltage0_RX1_LO_frequency via sysfs.

    How can I speed this up?

    I would like to scan from 30M to 6G as fast as possible.

    With the slow LO change this takes 30 seconds, which is very slow.

    Maybe SPI clock running slow? If so, how would I change this?

    Thanks for the help



    
			
    
			
									
		                             
                        

    
    
                                            
                 ADRV9002
                
                                                    
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                 RF Integrated Transceivers