The A-7550 Portable Spectrum Analyzer provides coverage of 10kHz to 1.0GHz frequency range. Resolution bandwidth of 300Hz to 3MHz. Fully synthesized RF systems and direct center frequency entry. Provides 70 dB dynamic range and measurement range of -120 dBm to +30 dBm. Many other great features, such as menu driven display modes, variable top scale reference, automatic optimization, automatic amplitude calibration, selectable linear/log display modes, and digital display of all displayed parameters.