dsp sdr radio receiver 4 3 inch 100khz to 149mhz fm mw ssb cw ham shortwave radio receiver portable shortwave radioDescription: The product is based on for Tayloe Quadrature Product Detector method to achieve frequency mixing. The clock generator Si5351 generates two variable frequency orthogonal square wave signals as excitation, achieving an ultra low noise ZIF zero intermediate frequency receiver. The IQ signal obtained after mixing is output to the CODEC and collected by the MCU, where the DSP algorithm completes signal demodulation and display. Features: 1.