SDR architecture enables flexible digital signal processing, wide tuning capability, and improved filtering for clearer reception. If a strong broadcast is nearby, you may encounter serial stations or mirror stations. This phenomenon may affect listening clarity in certain conditions. Antenna interface and compatibility: the input impedance of the antenna connector is 50 ohms. For medium wave stations, connecting a dedicated medium wave ring antenna externally is recommended to achieve better listening performance. Performance and usage notes: the 50 ohm input supports external antennas, enabling optimized reception when paired with the appropriate accessory. External MW ring antennas are specifically suggested to enhance medium wave listening quality. Size and materials: size and materials are not specified in the provided information. Recommended use scenarios: Home listening in areas with strong nearby broadcasts on the medium wave band. Connect a dedicated medium wave ring antenna to the 50 ohm input to improve reception and reduce interference. Enthusiast setup for medium wave listening or DXing. Use the SDRbased receiver with an external MW ring antenna to maximize sensitivity and selectivity. Temporary or mobile setups in urban environments. Utilize the 50 ohm interface and, when listening to medium wave signals, attach an external MW ring antenna to boost performance.