There are a wide range of Spectrum Analyzers <1GHz. These instruments are used to express frequency as a function of time. The frequency domain is measuring the amplitude of sine wave as related to the time domain. Spectrum Analyzers < 1GHz are generally scalar instruments used to measure and/or monitor a specific range of frequencies. If you are looking for new or used spectrum analyzers < 1GHz for rent, lease or for sale, contact us or request a quote today.