Products Mentioned

AD723 Production
The AD723 is a low cost RGB-to-NTSC/PAL encoder that converts analog red, green, and blue color component signals into their corresponding luminance and...
Datasheet
AD723 on Analog.com

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We need "SYNC SEPARATOR" block diagrams of AD723.

		
	
				

			

									
					    aimPoint
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jun 13, 2013 
				
			
			
		
    
		
		                    	    
    
        	    
    Thread Summary
    
                The user is experiencing an unstable burst signal position in CVBS output when using the AD723, due to the 4FSC running asynchronously to the RGB signal. The final answer confirms that the AD723 meets SMPTE 170M standards and refers to the datasheet for timing relationships, but the exact variation range of the burst signal start timing is not provided. The user is waiting for more detailed information from an expert.
                        	    
    
                
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    Hi all.
    
 
    We will have to design equipment with the AD723,
    Position of the burst signal of CVBS to be output is unstable.
    
 
    Because 4FSC is provided only in AD723, 
    It is running asynchronously to the source side RGB signal.
    
 

    I need an explanation on how to generate the burst signal.
    
 
    Could you please provide block-diagram of the "SYNC SEPARATOR" and description of that operation mechanism?
      
    
 
      
    
 
    Best Regards
    aimPoint.
    
			
    
			
									
		                             
                        

    
    
                                            
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							FormerMember
					
      
		
      
		    
		    		    
			
				
									FormerMember
							        
			
			
			
    
            
						
                            
            
            				
            
                on Jun 13, 2013 4:38 PM
            
            
						
			            		
    
		
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    Is this related to thread https://ez.analog.com/message/88784#88784 ?
    
 
    I'm am contacting the AD723 expert for more information.
    
			
    

		
			
	      

		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
				
						
				
				
		
		
    
			
		
    
	
    

    


	

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                on Jun 13, 2013 5:01 PM
            
            
						
			            		
      
		
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      Hi GuenterL
      
 
      Thankyou replay.
      
 
      > Is this related to thread https://ez.analog.com/message/88784#88784 ?
      
 
      =>
      
 
      That is right.
      
 
      Since you have not been updated from "2013,June,04th 10:06", I question again.
      
 
      Has been a demand for an explanation.
      Sorry to trouble you, thank you.
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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							FormerMember
					
      
		
      
		    
		    		    
			
				
									FormerMember
							        
			
			
			
            
						
                            
            
            				
            
                on Jun 13, 2013 5:30 PM
            
            
						
			            		
      
		
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      The device meets SMPTE 170M standards and the datasheet shows the timing relationship between the sync pulses and the burst gate logic.  I'm trying to get more information from the expert to see if he can or will release more details.
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
						
						
				
				
		
		
      
			
		
      
	
      

      

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                on Jun 13, 2013 5:56 PM
            
            
						
			            		
        
		
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        Hi GuenterL
        
 
        Thankyou quick replay.
        
 
        > The device meets SMPTE 170M standards and the datasheet shows the timing relationship between the sync pulses and the burst gate logic. 
        =>
        I confirm the data sheet, but the variation range of the Burst signal start Timing is not listed numerically.
        
 

        > I'm trying to get more information from the expert to see if he can or will release more details.
        =>
        I will wait for the answer.
        
 
        Best Regards
        aimPoint.
        
			
        

		
			
	      

		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

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