Signet Electronics Pvt. Ltd manufactures Spectrum Analyser with Frequency Range 3-850MHz. Signet Electronics Pvt. Ltd also manufactures radio sets, radiograms, hi-fi audio systems, public address systems etc. The Spectrum Analyser with Frequency Range 3-850MHz, Model S-5022, offers unique performance and measurement capabilities specially suited for educational applications. The Spectrum Analyser with Frequency Range 3-850MHz has 0.1dB resolution with built-in noise generator. This Spectrum Analyser has centronics interface.