When we measure LO Leakage at the Tx port of FMCOMMS4-EVZ module with 0dB Tx attenuation, the value is around -50dBc at 2.4 GHz. This is near the value mentioned in the data sheet. However the LO leakage is around -38dBc at 4.4 GHz and also at 5.5GHz. This value is clearly well out of range mentioned in the data sheet. There is no change in the setup while measuring the LO leakage at all the three frequencies. We are operating the board in FDD mode.