![]() Theoretically, the circuit can be omitted and the antenna can be connected directly to the capacitor C13, but at the cost of significantly deteriorating the reception quality. The input antenna matching circuit consists of 3 windings wound on a ring core, the middle of which is a resonant circuit, adapted to the selected operating frequency range. Note – the uSDX-RX diagram has been updated on Ap– R8 has been added. The circuit is so simple that it can be quickly assembled on a universal PCB or on a prototype breadboard. An example of this is the uSDX-RX receiver shown below, capable of receiving AM, FM, SSB (single-sideband modulation) and CW (telegraphy – Morse code) signals in a wide frequency range. However, other devices that use digital signal processing also fall under the SDR category. Further processing of the signal takes place on the sequences of “ones and zeros”. Here’s the next one – the simplest and cheapest SDR receiver in the world!Ī “real” SDR radio is one where the RF signal received by the antenna is directly sampled by an analog-to-digital converter. ![]() There are thousands of designs around these modules. Arduino is a favorite toy for electronics enthusiasts.
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