The Rohde and Schwarz FSH3 is a handy, robust and portable 3 GHz spectrum analyzer for rapid and cost-effective signal investigations. The FSH3 can handle anything from installation or maintenance of mobile radio base stations, through on-site fault location in RF cables to simple lab applications. option FSH3 1145.5850.03 Handheld Spectrum Analyzer, 100 kHz to 3 GHz, with preamplifier FSH3 1145.5850.13 Handheld Spectrum Analyzer, 100 kHz to 3 GHz, with tracking generator FSH3 1145.5850.23 Handheld Spectrum Analyzer, 100 kHz to 3 GHz, with tracking generator and preamplifier