Dear Sir, I have setup the ad_fmcomms3 evb and attached it on FPGA board via FMC connector to build up my wireless application system now. According to the filter design and my system requirement, I have applied the configuration below:
1、FDD、1T1R、CMOS mode、DDR。
2、DATA_CLK and ADC should be 48MHz for I/Q。
3、Set all decimation factor be 1 to HB3, HB2, HB1, and RFIR to let the ADC_CLK=DATA_CLK=48MHz。Therefore the RX sampling rate is 48 MSPS
4、Select to bypass RFIR and TFIR。
And then AD9361 RF DC CALIBRATION is always failed, it means SPIRead(0x016) [1] is always 0x1. This bit won't be clear to reach "Cal DONE".
But if I change the filter setting to set decimation factor of HB1 be 2, means to let ADC_CLK=96MHz (DATA_CLK is still 48MHz), the RF DC CALIBRATION will success and done. But this case is not what I want. I need to keep ADC_CLK=DATA_CLK=48MHz。 May sir help to fixed this RF DC CALIBRATION FAIL issue to fullfill my need? Thank you!
Ryan