The HP 8558B displays the amplitude and frequency of each component of an input signal on a CRT. This display gives quantitative information often not available from a conventional oscilloscope. The HP 8558B is capable of measuring signals from - 117 dBm to +30 dBm over a frequency range of 100 kHz to 1500 MHz. Option 001: -110 dBm to + 30 dBm Option 002: - 63 dBm V to +80 dBm V The complete measuring system includes the HP 8558B Spectrum Analyzer plugged into a compatible Hewlett-Packard display mainframe.