Spectrum Analyzer,
20 Hz to 40 MHz, 3 Hz resolution bw, -137 dBm to +30 dBm measurement range. 50 Ohm, 75 Ohm, and 1 Megohm selectable input impedance. Built-in tracking generator. CRT readout of panel settings & markers, digital storage, autoranging input attenuator. HP-IB with direct-plot capability.