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how to properly set the settings in real time display graph

		
	
				

			

									
					    sss36
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Aug 12, 2013 
				
			
			
		
    
		
		                    	    
    
        	    
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                The user is experiencing issues with a real-time display graph showing spikes instead of a 500 Hz sine wave. The final answer suggests using a physical oscilloscope or a sound editor like Audacity to view high-frequency waveforms, as the real-time display is limited to a few tens of Hz. An equivalent-time sampling technique at 498 Hz can also be used to visualize the 500 Hz sine wave. For saving the signal to a PC, optical S/PDIF is recommended as the simplest method, or the analog output can be used if additional DAC and ADC in the signal chain are acceptable.
                        	    
    
                
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    Hi,
    
 
    I am using real time display graph to plot sine tone freq=500hz. but I am not getting the correct output in real time display graph? I am getting spikes instead of sine wave. I just want to know what are the proper setting for realtimedisplay block. The pic of project is attached
    
 
    Thanks
    
			
    
			
									
		                             
                        
		
    

				
				        
        		
    
			
						
									
												
			
			
                        
                                    
                        
                        
                        
            
			            
						
						
			
			
			
			
		
    

        
        
        
    
					
    
			
    


    
















    
	
    
	
    
					



			








	
	
	
	



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      •  Super User  
      
            
						
                            
            
            				
            
                on Aug 13, 2013 1:42 AM
            
            
						
			            		
      
		
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           Hello sss36,
      
 
           There's a few ways to see a waveform that's too fast for the Real-Time Display (which as Brett notes, is great for following envelopes and compressor side-chains, but not suitable for audio frequency waveforms):
      
 
        
  
      • Connect a spare DAC to the desired measuring point and use a physical oscilloscope to view the result.
        • 
  
      • If a scope is not handy, use a sound editor (like Audacity) to record and view the waveform, like this:
        • 
  
      • For truly repetitive waveforms you could try an equivalent-time technique, where you re-sample your test waveform at a rate just under the test waveform's frequency.  Below, a 500 Hz sine wave is sampled at 498 Hz to draw a 2 Hz version of the original on the Real-Time Display:
        • 
 
      
 
      
 
           Best regards,
      
 
           Bob
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
						
						
				
				
		
		
      
			
		
      
	
      

      

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      •  Super User  
      
            
						
                            
            
            				
            
                on Aug 13, 2013 1:42 AM
            
            
						
			            		
      
		
										0
					
	
      

		
		
      
		
      
                                
                                                            
      
					
           Hello sss36,
      
 
           There's a few ways to see a waveform that's too fast for the Real-Time Display (which as Brett notes, is great for following envelopes and compressor side-chains, but not suitable for audio frequency waveforms):
      
 
        
  
      • Connect a spare DAC to the desired measuring point and use a physical oscilloscope to view the result.
        • 
  
      • If a scope is not handy, use a sound editor (like Audacity) to record and view the waveform, like this:
        • 
  
      • For truly repetitive waveforms you could try an equivalent-time technique, where you re-sample your test waveform at a rate just under the test waveform's frequency.  Below, a 500 Hz sine wave is sampled at 498 Hz to draw a 2 Hz version of the original on the Real-Time Display:
        • 
 
      
 
      
 
           Best regards,
      
 
           Bob
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
						
						
				
				
		
		
      
			
		
      
	
      

      

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