Model 01 is a digital demodulation radio based on SDR architecture. Signal path and demodulation: The IQ signal obtained after mixing is output to the CODEC and collected by the MCU; the algorithm in the MCU completes the demodulation and display of the signal. Frontend reference: Tayloe mixer with Ultra Low Noise, Performance, Zero IF Quadrature Product Detector and Preamplifier. Clocking and receiver architecture: This product uses a Si5351 clock generator to produce two quadrature square wave signals with variable frequency as excitation, enabling an ultralownoise zeroIF (ZIF) receiver based on the Tayloe Quadrature Product Detector method. Build and portability: Allaluminum alloy CNC shell provides a sturdy, compact form factor suitable for outdoor use. Display: 4.3inch brightness IPS LCD display with 800x480 resolution. Display specifications: 4.3 inch IPS, 800x480 resolution; DC dimming bright LCD. Operating system and display features: 01 is a digital demodulation radio based on SDR architecture; it features a 192 kHz wide spectrogram and waterfall display; 16bit sampling; a dynamic receiver with CW, AM, SSB and FM demodulation functions. Note on suitability: This product is neither an instrument nor a professional radio. Compared with dedicated instruments or professional radios, the receiving performance is slightly lower. The device achieves frequency mixing using the Tayloe Quadrature Product Detector method. Use scenarios: Outdoor field listening and experimentation: take the compact allaluminum unit outdoors to listen to CW, AM, SSB and FM signals while enjoying a portable SDR experience. SDRbased signal analysis: use the 192 kHz spectrogram and waterfall display to observe wideband signals and perform demodulation across multiple modes. Hobbyist radio monitoring: suitable for casual listening and monitoring of local stations, casual DX listening, and general radio exploration without requiring professionalgrade equipment.