Spectrum Analyzer, 9kHz-1.8GHz Spectrum Analyzer 9kHz-1.8GHz The 8590B Portable Spectrum Analyzer covers a frequency range of 9kHz to 1.8GHz. Amplitude range of -115 to +30 dBm. Resolution bandwidth of 3kHz to 3MHz. 60 dB range input attenuator. Weighs only 30 lbs. Manufacturer's Options Option 001 = 75-ohm Input Impedance