Hi, Using *uhd_cal_tx_iq_balance* and *uhd_cal_rx_iq_balance*, I am able to find the coefficients of IQ Imbalance. However, I am having difficulty in interpreting these results.
1) In calibration file, at lo_frequency=915MHz, correction_real=-0.00548 and correction_imag=0.00960. How can I estimate gain error and phase error from these coefficients as described in the Wikipedia of IQ Imbalance https://en.wikipedia.org/wiki/IQ_imbalance? What are the last two columns '*measured*' and '*delta*' mean? 2) Now, as mentioned in https://files.ettus.com/manual/page_calibration.html, we can ignore calibration files. However, how to use this feature in USRP Source/Sink block in GRC? 3) When we run GRC file with USRP sink/source blocks, does USRP perform calibrations every time or use values stored in calibration file stored in /.uhd/cal/? Thanks, Kunal
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