The best spectrum analyzer for beginners that field professionals recommend is either the Ragol DSA815-TG, or the Siglent SSA3021X, or the Oscium Wipry 2500x. A Spectrum Analyzer is an instrument that allows you to measure, analyze and visualize RF signals. We have done the. With prices ranging from under $100 to over $10,000, and technical specs that read like alphabet soup, choosing the best spectrum analyzers for your needs requires understanding what actually matters for your specific applications. Now, getting the own spectrum analyzer, to avoid any bad situations while working on valuable projects, can be a very tricky task. The screen visualizes them in a graphic of amplitude vs frequency.