SRD-20

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Part Status:	Active

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SRD-20 is a type of radio frequency digital receiver (RFDR) designed to detect, analyze, decode and demodulate all types of non-directional audio, video and data signals in the frequency range of 20 - 940 MHz. This system has been approved for use both by the military and civilian radio users. It has been designed for real-time application in the most demanding conditions, including aircraft, land and sea platforms.SRD-20 technology is based on the latest achievements in radio frequency recording and digital signal processing techniques. It provides a wide range of performance characteristics, such as improved sensitivity, robust signal reception, enhanced audio fidelity, increased accuracy in digital demodulation, ultra-fast signal recognition, advanced error correction algorithms and full network integration.The main applications of SRD-20 include surveillance, intelligence gathering, communications monitoring, air defense, battlefield surveillance, radio signal analysis, and secure communications. Furthermore, SRD-20 can be used to monitor and analyze digital signals from radio navigation systems, broadcast satellite transmissions, radio-frequency identification (RFID) systems, and digital wireless networks.The main components of SRD-20 are the receiver section, the signal processing section, the signal analysis section and the output module. The receiver section consists of an RF front-end, a baseband filter, an analog-to-digital converter, an adaptive equalizer, and a digital receiver. The RF front-end can detect and process non-directional signals in the frequency range of 20 - 940 MHz. The baseband filter limits the signal bandwidth and eliminates high frequency noise and interference. The analog-to-digital converter accurately quantizes the signal waveform into discrete pulse-code modulated samples.The signal processing section consists of an adaptive equalizer, a digital signal processor, and a tracking loop. The adaptive equalizer is designed for filtering out the wanted signal from the noise. The digital signal processor is used for producing an accurate estimate of the signal waveform. Finally, the tracking loop uses the signal waveform estimation to generate an estimate of the signal parameters.The signal analysis section is made up of digital signal processing algorithms and signal processing algorithms. The digital signal processing algorithms analyze the signal waveform and identify the type of signal. The signal processing algorithms filter the signal to remove unwanted components.Finally, the output module produces the demodulated digital signals with the identified information. The demodulated digital signal can then be used for further processing or analysis by other systems or for display.The working principle of SRD-20 is based on the ability of the receiver to detect, process and decode all kinds of digital or analog signal, no matter how faint, which is then decoded into its original form. The receiver is designed to work within an environment of heavy interference and low-power signals with high fidelity.Overall, SRD-20 is an advanced RFDR system that provides extremely accurate and reliable signal reception and signal analysis for a wide range of applications. It has been designed for the most challenging conditions, including aircraft, land and maritime platforms.SRD-20 is capable of providing unmatched performance in a wide variety of conditions, providing the most complete and accurate signal information available.

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