Error during ADRV9026 high-level API init. sequence

Question

Dear all, 
 I tried to perform the initialization sequence for ADRV9026, but there was an error after carrying out the Post MCS Sequence (adi_adrv9025_PostMcsInit) and I honestly do not know how to deal with it. Moreover, I tracked down the error which regarded the following functions: 
 errFunc	const char *	adi_adrv9025_CpuCmdStatusWait	
errFile	const char *	../src/devices/adrv9025/public/src/adi_adrv9025_cpu.c	
varName	const char *	device	
errormessage	const char *	CpuCmdStatusWait() failed due to thrown CPU error. Is device in correct state for calling command?	

errFunc	const char *	adrv9025_CpuCmdErrorHandler	
errFile	const char *	../src/devices/adrv9025/private/src/adrv9025_cpu.c	
varName	const char *	mailboxErrCode	
errormessage	const char *	TIARx:No solution for RX 

errFunc	const char *	adi_adrv9025_PostMcsInit	
errFile	const char *	../src/devices/adrv9025/public/src/adi_adrv9025_utilities.c	
varName	const char *	((void *)0)	
errormessage	const char *	TIARx:No solution for RX 
 It is worth mentioning that not only the platform is a custom board, but also each Rx channel's input is connected to the differential pins of a balun (1720BL15A0100) which its input is not present/driven. 
 In addition, I attach initdata.c and the log file for further details. 
 Best regards,

Ramarao · Accepted Answer

It could be matching issue at the ports. Please check the matching on the board, for eg, Balun, matching components etc..)

JNPH · Answer

There was no issue regarding the matching but the component connected to the RF balun's pin GND/DC_FEED+RFGND.

Analog indicates in UG1727 (pag. 218-221) that a 0-Ohm resistor should be connected from the aforementioned pin to GND for the 650...2800-MHz freq. band. However, this does not make any sense from my point of view, more even so that Analog suggests placing a cap. for the other freq. bands. Hence, I placed a 1-nF and 100-pF cap. instead of R305 and C305 respectively, such that they would not only behave as a short circuit at the operation freq. range, but also bypass the bias voltage of the Rx. ch.'s output. It is worth mentioning that I did the same for all Rx. and Obs. Rx. channels. 
 In the end, the initialization sequence was successful without excluding the TIA and QEC cal. in the Post MCS Sequence.

tanktangjs · Answer

I am using ADRV9026 in 3GHz-5GHz, so it is in high band. I have followed this matching and solved the cal problem. 
 Appericate your reply, thank you very much!!

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Error during ADRV9026 high-level API init. sequence