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AD9361 calibration will be issue when RX port input a strong signal

Question asked by little_fish@rf on Feb 5, 2018
Latest reply on Feb 5, 2018 by sripad

Dear sripad,
      i found AD9361 calibration will be issue when RX port input a strong signal, ex -30dBm OFDM signal.
      i think the strong signal will cause RX DC offset and RX QEC tracking error; so i have to turn off SG output when AD9361 in calibration process.

      i wonder what power level can avoid RX DC offset and RX QEC tracking calibration issue? this make happen in product application, for we don't know whether the wireless channel is clean;
      i suggest a way to make calibration steady:

      1. calibration in a clean wireless enviroment under control;
      2. record the register calibtation setting value to a NVM device, such as the spi norflash.
      3. when AD9361 powerup again, configure the register using the NVM stored value, not recalibratoin again;

      but i don't know which registers stores calibration value, it is impossible to store all AD9361 register to the NVM device;

      thanks;

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