Computer hardware and recorded software for operating signal processing apparatus sold as a unit; signal detecting and analyzing apparatus; digital signal detector; analog signal detector; signal processing apparatus, namely, software-defined radio (SDR) for detecting, analyzing, and geo-locating radio frequency signals; spectrum analyzers for use in wideband radio frequency monitoring, commercial protocol decoding, and signal change detection; electronic detectors for observing and measuring the radio frequency spectrum, namely, radio frequency detectors; computer hardware, namely, single-board computers with memory and processing capabilities for running signal detecting and analyzing software; self-contained electronic signal monitoring and processing system comprising a signal receiver, signal processing software, and graphical user interface
Electrical and Scientific Apparatus