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; Radio-frequency receivers

'analog':23 'analyz':18,37,46,92 'apparatus':10,19,28 'board':80 'capabl':86 'chang':59 'commerci':54 'comput':1,75,81 'decod':56 'defin':32 'detect':16,36,60,90 'detector':22,25,62,74 'digit':20 'electron':61 'frequenc':43,52,69,73,96 'geo':40 'geo-loc':39 'hardwar':2,76 'locat':41 'measur':66 'memori':83 'monitor':53 'name':29,71,77 'observ':64 'oper':7 'process':9,27,85 'protocol':55 'radio':33,42,51,68,72,95 'radio-frequ':94 'receiv':97 'record':4 'run':88 'sdr':34 'signal':8,15,21,24,26,44,58,89 'singl':79 'single-board':78 'softwar':5,31,93 'software-defin':30 'sold':11 'spectrum':45,70 'unit':14 'use':48 'wideband':50

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