I load the default setting in LimeSuite GUI and try to receive a single tone from a SMU200A RF Gen. I use default settings and tune the default clk rate and 1200MHz Rx freq. I input a -10dBm 1200.4MHz single tone signal and use the min gain by changing the lna gain and pga gain to min. I get the waveform from fft viewer but found many spurs. How do these spurs come form? I tried to cal the rx channel but things didn’t become better.