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LO leakage problem on AD9361

Question asked by on Nov 22, 2017
Latest reply on Nov 22, 2017 by Vinod

We developed a SDR based on AD9361 and Zync 7000, copying from the Avenet design. We found 20 out of 100 baords have big TX LO leakage problem when our QPSK signal is transmitted. All AD9361 calibration and intialization are passed, but those boards always generated big LO. We checked DC supplies and other hardware circuits, they are all fine.