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ADRV9009 TX 输出信号的EVM问题

		
	
				

			

									
					    xdwzl
					
							

            
            			
				
									
											
			
			
				
			
			
			    	
			                    
                
				                on Aug 14, 2023 
				
			
			
		

		
		                    	    

        	    
Thread Summary

                The user experiences poor EVM on the first symbol in TDD mode with ADRV9009, but EVM normalizes from the second symbol onwards. The issue is resolved when ORX is set to always on or off. The final answer suggests configuring TRX based on the official profile and enabling LOL tracking to address the timing control requirements between TX, RX, and ORX.
                        	    

                
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ADRV9009在TDD模式下，发现下行信号的第一个symbol的EVM比较差，而从第二个symbol开始，EVM则变正常。


如果把ORX设置为常开或者常关，则所有symbol的EVM会正常，如果设置为TDD模式，则会出现如上不正常的状况。


请问，ADRV9009对于TX/RX/ORX的时序控制，有什么特别要求吗？或者其他外围电路以及设置上，会产生如上情况吗？


多谢！

			

			
									
		                             
                        

    

                                            
                 rf & microwave
                
                                                    
                 adrv9009
                
                                                    
                 Wideband Transceiver IC
                
                                                    
                 RF Integrated Transceivers
                
                                
            

    
    
		


				
				        
        		

			
						
									
												
			
			
                        
                                    
                        
                        
                        
            
			            
						
						
			
			
			
			
		


        
        
        
    
					

			





















	

	

					



			


				
	









	
    
	

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    •  Analog Employees  
    
            
						
                            
            
            				
            
                on Aug 17, 2023 4:24 AM
            
            
						
			            		
    
		
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    您好，建议您在官方提供的profile基础上配置TRX



    
    
    
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        ProfileLUT.txt
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    Profile Name	Profile Type	Primary Signal BW (MHz)	Passband BW(MHz)	JESD204 Sample Rate (MSPS)	CLKPLL VCO Frequency(MHz)	VCO DIV	HSDIV	ADC/DAC DIV	BBFilter 3dB (MHz)	TxDAC Filter 3dB (MHz)	Rx DDCMode	Rx DEC5/4 or Tx Int5 Int	Tx HB3 Int	Tx HB2 Int	HB1 Dec/Int	FIR Decimation/Interpolation	FIR Filter	Device Clock (MHz)	ADC Profile Filename	GSM_Mode
Rx 40MHz, IQrate 76.8MHz, Dec4	RX	40	40	76.8	12288	2	5	1	40	0	0	4	0	0	1	4	RxPFIRApp205_BW40_ADC1228p8_OR76p8.ftr	76.8 153.6 307.2 614.4	ADCcodes_RxMode205_RFBW40_Fs1228p8MHz.txt	0
Rx 60MHz, IQrate 122.88MHz, Dec4	RX	60	60	122.88	9830.4	2	2.5	1	60	0	0	4	0	0	2	2	RxPFIRApp209_BW60_ADC1966p08_OR122p88.ftr	122.88 245.76 491.52 983.04	ADCcodes_RxMode209_RFBW100_Fs1966p08MHz.txt	0
Rx 100MHz, IQrate 122.88MHz, Dec4	RX	100	100	122.88	9830.4	2	2.5	1	100	0	0	4	0	0	2	2	RxPFIRApp209_BW100_ADC1966p08_OR122p88.ftr	122.88 245.76 491.52 983.04	ADCcodes_RxMode209_RFBW100_Fs1966p08MHz.txt	0
Rx 100.00MHz, OutputRate 153.60MHz, TotalDec 8	RX	100	100	153.6	12288	2	5	1	100	0	0	4	0	0	1	2	RxPFIRAppxxx_BW100_ADC1228p8_OR153p6.ftr	76.8 153.6 307.2 614.4	ADCcodes_RxModexxx_RFBW100_Fs1228p8MHz.txt	0
Rx 100MHz RealIF, IQrate 245.76MHz, Dec4	RX	200	200	245.76	9830.4	2	2.5	1	200	0	RXDDC_FILTERONLY_REALIF	4	0	0	1	2	RxPFIRApp215_BW200_ADC1966p08_OR245p76.ftr	122.88 245.76 491.52 983.04	ADCcodes_RxMode215_RFBW205_Fs1966p08MHz.txt	1
Rx 150MHz, IQrate 184.32MHz, Dec5	RX	150	150	184.32	7372.8	2	2	1	150	0	0	5	0	0	1	2	RxPFIRApp214_BW150_ADC1843p2_OR184p32.ftr	92.16 184.32 368.64 737.28	ADCcodes_RxMode214_RFBW150_Fs1843p2MHz.txt	0
Rx 200MHz, IQrate 245.76MHz, Dec4	RX	200	200	245.76	9830.4	2	2.5	1	200	0	0	4	0	0	1	2	RxPFIRApp215_BW200_ADC1966p08_OR245p76.ftr	122.88 245.76 491.52 983.04	ADCcodes_RxMode215_RFBW205_Fs1966p08MHz.txt	1
Rx 205MHz, IQrate 368.64MHz, Dec5, 11G	RX	205	205	368.64	11059.2	2	3	1	102.5	0	0	5	0	0	1	1	RxPFIRApp222_BW205_ADC1843p2_OR368p64.ftr	184.32 245.76	ADCcodes_RxMode222_RFBW205_Fs1843p2MHz.txt	0
Rx 100MHz Low IF, IQrate 122.88MHz, Dec4	RX	200	200	122.88	9830.4	2	2.5	1	200	0	RXDDC_DEC2	4	0	0	1	2	RxPFIRApp228_BW100_ADC1966p08_OR122p88.ftr	122.88 245.76 491.52 983.04	ADCcodes_RxMode215_RFBW205_Fs1966p08MHz.txt	1
Tx 100/225MHz, IQrate 245.76MHz	TX	100	225	245.76	9830.4	2	2.5	1	113	225	0	1	2	2	2	1	TxPFIRApp110_IR245p76_BW225_PriSigBW100.ftr	122.88 245.76 491.52 983.04	ADCcodes_TxLBMode110_RFBW160_Fs1966p08MHz.txt	0
Tx 100/277MHz, IQrate 307.2MHz	TX	100	277	307.2	12288	2	5	1	138.5	277	0	1	1	2	2	1	TxPFIRAppxxx_IR307p2_BW277_PriSigBW100.ftr	76.8 153.6 307.2 614.4	ADCcodes_TxLBMode111_RFBW160_Fs1228p8MHz.txt	0
Tx 150/300MHz, IQrate 368.64MHz, Int5	TX	150	300	368.64	7372.8	2	2	1	152	300	0	5	1	1	1	1	TxPFIRApp115_IR368p64_BW300_PriSigBW150.ftr	92.16 184.32 368.64 737.28	ADCcodes_TxLBMode115_RFBW235_Fs1843p2MHz.txt	0
Tx 200/300MHz, IQrate 368.64MHz, Int5, 11G	TX	200	300	368.64	11059.2	2	3	1	150	300	0	5	1	1	1	1	TxPFIRApp118_IR368p64_BW300_PriSigBW200.ftr	184.32 245.76	ADCcodes_TxLBMode118_RFBW310_Fs1843p2MHz.txt	0
Tx 200/450MHz, IQrate 491.52MHz	TX	200	450	491.52	9830.4	2	2.5	1	225	450	0	1	1	2	2	1	TxPFIRApp116_IR491p52_BW450_PriSigBW200.ftr	122.88 245.76 491.52 983.04	ADCcodes_TxLBMode116_RFBW310_Fs1966p08MHz.txt	0
ORX 200MHz, IQrate 245.76MHz, Dec4	ORX	200	200	245.76	9830.4	2	2.5	1	225	0	0	4	0	0	2	1	ORxPFIRApp307_BW200_ADC1966p08_OR245p76.ftr	122.88 245.76 491.52 983.04	ADCcodes_ORxMode307_RFBW200_Fs1966p08MHz.txt	0
ORX 277MHz, IQrate 307.2MHz, TotalDec 4	ORX	277	277	307.2	12288	2	5	1	138.5	0	0	4	0	0	1	1	ORxPFIRAppxxx_BW277_ADC1228p8_OR307p2.ftr	76.8 153.6 307.2 614.4	ADCcodes_ORxModexxx_RFBW277_Fs1228p8.txt	0
ORX 300MHz, IQrate 368.64MHz, Dec5, 16bit	ORX	300	300	368.64	7372.8	2	2	1	225	0	0	5	0	0	1	1	ORxPFIRApp313_BW300_ADC1834p20_OR368p64.ftr	92.16 184.32 368.64 737.28	ADCcodes_ORxMode313_RFBW300_Fs1843p2.txt	0
ORX 300MHz, IQrate 368.64MHz, Dec5, 12bit	ORX	300	300	368.64	11059.2	2	3	1	225	0	0	5	0	0	1	1	ORxPFIRApp313_BW300_ADC1834p20_OR368p64.ftr	184.32 245.76	ADCcodes_ORxMode313_RFBW300_Fs1843p2.txt	0
ORX 450MHz, IQrate 491.52MHz	ORX	450	450	491.52	9830.4	2	2.5	1	225	0	0	4	0	0	1	1	ORxPFIRApp314_BW450_ADC1966p08_OR491p52.ftr	122.88 245.76 491.52 983.04	ADCcodes_ORxMode314_RFBW450_Fs1966p08.txt	0

    

    


    

    同时建议开启LOL tracking
    
			
    

		
			
	      

		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
						
						
				
				
		
		
    
			
		
    
	
    

    

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