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AD9524 failed to lock



		

			

									
					    avatarofcliff@hotmail.com
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Nov 3, 2020 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Hi,
    

     I have a AD9524/PCBZ(REV C), and PC is win10 64-bit.
    

    The software is the newest version on the website(v2.1.3).
    

    The AD9524 architecture is like this
    

    

     
    

    

    I got good connection with the EVB including reading and writing the registers, so I suspect that the software is not the problem.
    

     
    

    I check to see if PLL1 is working well by observing the output of PLL1_OUT, and the bit that indicates PLL1’s locking status.
    

     
    

    Due to the VCO on the board is 122.88MHz. So I generated the same frequency cosine wave(122.88MHz, 10dBm=707.1mV) and inserted it to REFA.
    

     
    

    Then I check the status, it said REF A receiver successfully received the signal and the VCXO did, too.
    

    

     
    

    The PLL1_OUT showed nothing when VCXO output driver is off, and showed the harmonics when VCXO output driver is on.
    

    

     
    

    

    Is there anyone could tell me the probable cause that makes the PLL1 failed to lock.
    

     
    

    Appreciate,
    

     Gordon
    

    
								
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	
    
		






				

			
    
			
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													0
							
			
				
									
							        
			
			
			
      •  Analog Employees  
      
            
			                            
                        
                on Nov 3, 2020 3:15 PM
            
            
					
      
	
      

		
		
      
					
      HI,
      

      could you please send me the stp file containing the AD9524 configuration?
      

      Petre
      
			
      

		
		
		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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      •  Analog Employees  
      
            
			                            
                        
                on Nov 5, 2020 1:23 PM
            
            
												
						in reply to avatarofcliff@hotmail.com
					
									
      
	
      

		
		
      
					
      Hi,
      

      I believe the problem is the PLL2 charge pump current set to 0. I set it to the max, just to get you going. Then you can reduce it to a more suitable value. Also, the outputs are set to stay in high impedance. You should select a driver for them.
      

      I attached the updated stp file. YOu need to zip the files before uploading them.
      

      ad9524_fail_to_lock2.zip
      

      Petre
      
			
      

		
		
		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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													0
							
			
				
									
							        
			
			
			
        
            
			                            
                        
                on Nov 6, 2020 6:17 AM
            
            
												
						in reply to pminc48
					
									
        
	
        

		
		
        
					
        Thank you for your assistance. But it doesn't work.
        PLL1 still failed to lock.
        

        By the way, I did't set the current of PLL2's CP because I tried to simplify the failure by only enable and observer PLL1.
        
			
        

		
		
		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

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        •  Analog Employees  
        
            
			                            
                        
                on Nov 10, 2020 3:20 PM
            
            
												
						in reply to avatarofcliff@hotmail.com
					
									
        
	
        

		
		
        
					
        HI,
        

        I played today with the AD9524 evaluation board. I got both PLLs to lock and the AD9524 to generate outputs.
        

        For some reason, I cannot attach a file to this response, so I cannot show the status window of the software or attach the stp file.
        

        Below is the content of the stp file I created. Copy it, put it into a file, give it the stp extension and load it into the evaluation software.
        

        On the evaluation board, make sure P4 jumper is between pins REF_SEL and LOW, so REFA is selected.
        

        I enabled REFA as differential receiver in INP receivers window.
        

        Enable the anti-backlash periods for both PLLs. I set the charge pump current at max for both PLLs, but once you get them to lock, you can start to reduce it.
        

        Set the outputs with LVPECL drivers because the evaluation board manual states the output circuit is ideal for this driver.
        

        Petre
        

        

        ;Header contains information about the setup file and revision
        <Header>
         Product = AD9524
         FileVersion = 1.0
         DecimalSeparator=. ;Used for internationalization
        </Header>
        

        <RegisterMap>
         &h0,&b00000000 ;00 Hex, 000 Dec
         &h2,&b01110000 ;70 Hex, 112 Dec
         &h3,&b00000011 ;03 Hex, 003 Dec
         &h4,&b00000000 ;00 Hex, 000 Dec
         &h5,&b00000000 ;00 Hex, 000 Dec
         &h6,&b00000000 ;00 Hex, 000 Dec
         &h10,&b00000000 ;00 Hex, 000 Dec
         &h11,&b00000000 ;00 Hex, 000 Dec
         &h12,&b00000000 ;00 Hex, 000 Dec
         &h13,&b00000000 ;00 Hex, 000 Dec
         &h14,&b00000000 ;00 Hex, 000 Dec
         &h15,&b00000000 ;00 Hex, 000 Dec
         &h16,&b00000000 ;00 Hex, 000 Dec
         &h17,&b00000000 ;00 Hex, 000 Dec
         &h18,&b01111111 ;7F Hex, 127 Dec
         &h19,&b00010011 ;13 Hex, 019 Dec
         &h1A,&b00101001 ;29 Hex, 041 Dec
         &h1B,&b00010000 ;10 Hex, 016 Dec
         &h1C,&b00001000 ;08 Hex, 008 Dec
         &h1D,&b00000000 ;00 Hex, 000 Dec
         &h1E,&b00000000 ;00 Hex, 000 Dec
         &h1F,&b00000000 ;00 Hex, 000 Dec
         &h20,&b00000000 ;00 Hex, 000 Dec
         &hF0,&b11111111 ;FF Hex, 255 Dec
         &hF1,&b11000111 ;C7 Hex, 199 Dec
         &hF2,&b00010011 ;13 Hex, 019 Dec
         &hF3,&b00000010 ;02 Hex, 002 Dec
         &hF4,&b01000000 ;40 Hex, 064 Dec
         &hF5,&b00000000 ;00 Hex, 000 Dec
         &hF6,&b00000000 ;00 Hex, 000 Dec
         &hF7,&b00000000 ;00 Hex, 000 Dec
         &hF8,&b00000000 ;00 Hex, 000 Dec
         &hF9,&b00000000 ;00 Hex, 000 Dec
         &hFA,&b00000000 ;00 Hex, 000 Dec
         &h190,&b00100000 ;20 Hex, 032 Dec
         &h191,&b00011111 ;1F Hex, 031 Dec
         &h192,&b00000100 ;04 Hex, 004 Dec
         &h193,&b00100000 ;20 Hex, 032 Dec
         &h194,&b00011111 ;1F Hex, 031 Dec
         &h195,&b00000100 ;04 Hex, 004 Dec
         &h196,&b00000001 ;01 Hex, 001 Dec
         &h197,&b00011111 ;1F Hex, 031 Dec
         &h198,&b00000100 ;04 Hex, 004 Dec
         &h199,&b00000001 ;01 Hex, 001 Dec
         &h19A,&b00011111 ;1F Hex, 031 Dec
         &h19B,&b00000100 ;04 Hex, 004 Dec
         &h19C,&b00000001 ;01 Hex, 001 Dec
         &h19D,&b00011111 ;1F Hex, 031 Dec
         &h19E,&b00000100 ;04 Hex, 004 Dec
         &h19F,&b00000001 ;01 Hex, 001 Dec
         &h1A0,&b00011111 ;1F Hex, 031 Dec
         &h1A1,&b00000100 ;04 Hex, 004 Dec
         &h1A2,&b00000000 ;00 Hex, 000 Dec
         &h1A3,&b00011111 ;1F Hex, 031 Dec
         &h1A4,&b00000100 ;04 Hex, 004 Dec
         &h1A5,&b00100000 ;20 Hex, 032 Dec
         &h1A6,&b00011111 ;1F Hex, 031 Dec
         &h1A7,&b00000100 ;04 Hex, 004 Dec
         &h1A8,&b00000000 ;00 Hex, 000 Dec
         &h1A9,&b00011111 ;1F Hex, 031 Dec
         &h1AA,&b00000100 ;04 Hex, 004 Dec
         &h1AB,&b00100000 ;20 Hex, 032 Dec
         &h1AC,&b00011111 ;1F Hex, 031 Dec
         &h1AD,&b00000100 ;04 Hex, 004 Dec
         &h1AE,&b00000001 ;01 Hex, 001 Dec
         &h1AF,&b00011111 ;1F Hex, 031 Dec
         &h1B0,&b00000100 ;04 Hex, 004 Dec
         &h1B1,&b00000001 ;01 Hex, 001 Dec
         &h1B2,&b00011111 ;1F Hex, 031 Dec
         &h1B3,&b00000000 ;00 Hex, 000 Dec
         &h1B4,&b00000000 ;00 Hex, 000 Dec
         &h1B5,&b00011111 ;1F Hex, 031 Dec
         &h1B6,&b00000100 ;04 Hex, 004 Dec
         &h1B7,&b00100000 ;20 Hex, 032 Dec
         &h1B8,&b00011111 ;1F Hex, 031 Dec
         &h1B9,&b00000100 ;04 Hex, 004 Dec
         &h1BA,&b00000000 ;00 Hex, 000 Dec
         &h1BB,&b00000000 ;00 Hex, 000 Dec
         &h22C,&b11100111 ;E7 Hex, 231 Dec
         &h22D,&b00000000 ;00 Hex, 000 Dec
         &h22E,&b00000000 ;00 Hex, 000 Dec
         &h22F,&b00000000 ;00 Hex, 000 Dec
         &h230,&b00000010 ;02 Hex, 002 Dec
         &h231,&b00000011 ;03 Hex, 003 Dec
         &h232,&b00000000 ;00 Hex, 000 Dec
         &h233,&b00000000 ;00 Hex, 000 Dec
         &h234,&b00000000 ;00 Hex, 000 Dec
         &hA00,&b00000000 ;00 Hex, 000 Dec
         &hA01,&b00000000 ;00 Hex, 000 Dec
         &hA02,&b00000000 ;00 Hex, 000 Dec
         &hA03,&b00000010 ;02 Hex, 002 Dec
         &hA04,&b00000000 ;00 Hex, 000 Dec
         &hA05,&b00000100 ;04 Hex, 004 Dec
         &hA06,&b00001110 ;0E Hex, 014 Dec
         &hA07,&b00000000 ;00 Hex, 000 Dec
         &hA08,&b00010000 ;10 Hex, 016 Dec
         &hA09,&b00001110 ;0E Hex, 014 Dec
         &hA0A,&b00000000 ;00 Hex, 000 Dec
         &hA0B,&b11110000 ;F0 Hex, 240 Dec
         &hA0C,&b00101011 ;2B Hex, 043 Dec
         &hA0D,&b00000001 ;01 Hex, 001 Dec
         &hA0E,&b10010000 ;90 Hex, 144 Dec
         &hA0F,&b00000001 ;01 Hex, 001 Dec
         &hA10,&b00000001 ;01 Hex, 001 Dec
         &hA11,&b11100000 ;E0 Hex, 224 Dec
         &hA12,&b00000011 ;03 Hex, 003 Dec
         &hA13,&b00000010 ;02 Hex, 002 Dec
         &hA14,&b00110000 ;30 Hex, 048 Dec
         &hA15,&b10000000 ;80 Hex, 128 Dec
         &hA16,&b11111111 ;FF Hex, 255 Dec
         &hB00,&b00000000 ;00 Hex, 000 Dec
         &hB01,&b00000000 ;00 Hex, 000 Dec
         &hB02,&b00000000 ;00 Hex, 000 Dec
         &hB03,&b00000000 ;00 Hex, 000 Dec
        </RegisterMap>
        

        <PinStates>
         PortA=&h1E ;Bit0=USBStatus, Bit1=CSB, Bit2=ResetB, Bit3=SyncB, Bit4=PDB, Bit5=RefSel
        </PinStates>
        

        <SoftwareSettings>
         AutoSendUpdate=1 ;AutoIOUpdate Setting
         REF_A = 122.8000
         REF_B = 30.7200
         REF_TEST = 10.0000
         VCXO = 122.880
        </SoftwareSettings>
        
			
        

		
		
		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

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													0
							
			
				
									
							        
			
			
			
          
            
			                            
                        
                on Nov 18, 2020 5:38 AM
            
            
												
						in reply to pminc48
					
									
          
	
          

		
		
          
					
          HI pminc48,

          Deeply appreciate your assistance .

          If it is convenience to you, would you please kindly send the stp file or related picture file to me?

          my email is
          

          gordon.chi@anstek.com.tw
          

          or
          avatarofcliff@hotmail.com
          
			
          

		
		
		
		
	
          
	
          
		
          
			
		
          
	
          
	
          
		
						
						
				
						
				
				
		
		
          
			
		
          
	
          

          

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													+1
							
			
				
									
							        
			
			
			
          •  Analog Employees  
          
            
			                            
                        
                on Nov 18, 2020 8:54 PM
            
            
												
						in reply to avatarofcliff@hotmail.com
					
									
          
	
          

		
		
          
					
          ad9524_fail_to_lock3.zip
          

           
          

          HI,
          

          for some reason, today I was allowed to upload files. Here they are
          

          Petre
          
			
          

		
		
		
		
	
          
	
          
		
          
			
		
          
	
          
	
          
		
						
				
						
						
				
				
		
		
          
			
		
          
	
          

          

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