I have my custom RF board using S2-LP and balun BALF-SPI2-01D3 (click here for the data sheet) and my custom board follows the evaluation design given in the balun data sheet. I am having problem with it:
The host controller communicates fine with S2-LP over SPI (I can see the expected signals on oscilloscope for SCL, SDI, SDI and CS). Also SMPS 1 and 2 (pins 2 and 3 of S2-LP) show expected waveforms. But there is not signal on TX pin. Can anyone help me please?