• State Verified Answer
  • +1 person also asked this people also asked this
  • Replies 5 replies
  • Subscribers 38 subscribers
  • Views 1262 views
  • Users 0 members are here
Options
Similar Content 

        

            Post
             Go back to editing
        

    

    


    

    









		












	
	
			
	
			
		
	
	
		

		
ADSP21469 SPDIF Rx and Tx latency



		

			

									
					    Hfuhrhurr
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Feb 7, 2017 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Hi all,
    
 
    I can't find any information on the signal delay that the SPDIF receiver and transmitter introduce.
    
 
    I assume that the transmitter does not generate signal latency at all, however the receiver should.
    
 
    So, let's assume the following:
    
 
    DSP 1 generates a master clock, outputs a signal via ADCs and passes this signal via SPDIF transmitter to DSP2
    
 
    DSP2 uses the recovered clocks and outputs the received signal via ADC.
    
 
    Currently, I measure a delay of 3.5 samples at 48 kHz between these 2 analog signals.
    
 
    But there should be any official information about this, shouldn't it?
    
 
    Best regards,
    
 
    Rainer
    
									
			        
		
    

				
						
        

		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	















    
	
    
	
    
					



			








	
	
	
	



Parents
	
      
	

    • 
	
      



	
			
		
	



      
	
      
		
      
							
					
      
		
      
			
													0
							
			
				
									
							        
			
			
			
        
            
			                            
                                                                                                                        
            
				
			
            
					
        
	
        

		
		
        
					
        Hi Jithul,
        
 
        I have a 21469, feed an AES signal into the SPDIF Receiver, connect DIR_FS_O, DIR_CLK_O, DIR_DAT_O and DIR_TDMCLK_O to the respective inputs of the SPDIF transmitter and grab the output by a measurement system.
        
 
        I, then measure the frequency resp. impulse response of this system.
        
 
        First, I do a reference measurement of my measurement system by connecting the AES output and input of the measurement system using a wire. Impulse response measurements using this wire, then, show a latency of zero.
        
 
        Then, I connect the DSP to the measurement system and measure the impulse response which shows a latency of 3,5 samples.
        
 
        Regards,
        
 
        Rainer
        
			
        

		
			
	      

		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
				
						
						
				
				
		
		
        
			
		
        
	
        

        

        • 

	
      



Reply

        


      • 
	
        



	
			
		
	



        
	
        
		
        
							
					
        
		
        
			
													0
							
			
				
									
							        
			
			
			
          
            
			                            
                                                                                                                        
            
				
			
            
					
          
	
          

		
		
          
					
          Hi Jithul,
          
 
          I have a 21469, feed an AES signal into the SPDIF Receiver, connect DIR_FS_O, DIR_CLK_O, DIR_DAT_O and DIR_TDMCLK_O to the respective inputs of the SPDIF transmitter and grab the output by a measurement system.
          
 
          I, then measure the frequency resp. impulse response of this system.
          
 
          First, I do a reference measurement of my measurement system by connecting the AES output and input of the measurement system using a wire. Impulse response measurements using this wire, then, show a latency of zero.
          
 
          Then, I connect the DSP to the measurement system and measure the impulse response which shows a latency of 3,5 samples.
          
 
          Regards,
          
 
          Rainer
          
			
          

		
			
	      

		
		
	
          
	
          
		
          
			
		
          
	
          
	
          
		
						
				
						
						
				
				
		
		
          
			
		
          
	
          

          

          • 


        


Children
	
        No Data