I work with a USRP X310 and two CBX-120 daughterboards. I would like to calibrate the daughterboards according to the page https://files.ettus.com/manual/page_calibration.html on USRP Hardware Driver (UHD) manual. After applying the utilities for self-calibration, with or without 50 Ohm terminators attached to the RF ports, I see no difference with “ignore-cal-file” enabled or disabled. I transmitted both a single tone and an OFDM-like waveform at Low-IF mode. There was no difference in terms of LO leakage or IQ imbalance. I am not sure if I missed something to do. Do you have any ideas?
Please let me know if you need any specific information to help me. Thanks!
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