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SC1894 Recommended for New Designs
The SC1894 is the Scintera® 3rd generation of RF PA linearizers (RFPAL™) that provide improved correction and functionality over the previous generations...
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SC1894 on Analog.com

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unable to Callibrate SC1894 across the bandwidth (2300MHz to 2700MHz)

		
	
				

			

									
					    Jalaj
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Nov 3, 2025 
				
			
			
		
    
		
		                    	    
    
        	    
    Thread Summary
    
                The user is experiencing issues with the SC1894A-2400 board not applying correction across the 2300MHz to 2700MHz bandwidth. The support engineer suggests that the device must be calibrated for each specific frequency within the range, and mentions the 'smooth mode' calibration for two-frequency calibration as described in the SPI programming guide. The engineer will verify this and provide further guidance.
                        	    
    
                
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    Category: Hardware
    
    		        		            		    
    Product Number:  SC1894  
    
    		        		    		    
    
		    		    
		    			
    
			    
    Dear Team,

    I am operating in 2300MHz -2700MHz BW  and trying to use the SC1894A-2400 board for the purpose. But the board is not applying correction across the bandwidth. If I callibrate it at 2700 MHz , it doesn't apply the correction at 2300MHz and vice-versa. Even the centre frequency callibration isn't helping. It is only working for 50MHz BW give and take.
    Can you please help ?

    Thanks and Regards
    Jalaj
    
			
    
			
									
		                             
                        

    
    
                                            
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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Nov 5, 2025 10:59 AM
            
            
						
			            		
      
		
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      Hi Jalaj, 
      I need to check with a colleague who knows this part better than me but my sense is that the device must be calibrated on a per-frequency basis. In the SPI programming guide on page 62, they talk about so-called “smooth mode” calibration which allows two-frequency calibration.  That suggests to me that the part must be calibrated for all intended operating frequencies. But I'll check in this and will get back to you. - Eamon
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
				
				
				
		
		
      
			
		
      
	
      

      

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                on Nov 5, 2025 11:07 AM
            
            
						
			            		
        
		
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        Hi  ,
        Thanks for getting back to me.
        I am not sure that it stores the coefficients on a per memory basis.
        Also, I would like to add that once I change the frequency after callibration, resetting it helps(disable and then enable again) and it starts working for that frequency .
        Appreciate your support on this, thanks again

        Best 
        Jalaj
        
			
        

		
			
	      

		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
				
				
				
		
		
        
			
		
        
	
        

        

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