The Boonton 51075A is a Power Sensor with Frequency 500 kHz to 18 GHz, Power/Dynamic Range -70 to +20 dBm. Wide dynamic range dual diode sensor for Average & CW Power Type. Features Diode Power Sensor Power Measurement Average Power, CW Power Connector, N Type - Male Impedance 50 Ohms Frequency 500 kHz to 18 GHz Dynamic Range1 -70 to +20 dBm Overload Rating pulse/cont. 1 W for 1µs, 300 mW SWR 500 kHz- 2 GHz = 1.15 / 2 GHz-6 GHz = 1.20 / 6 GHz - 18 GHz = 1.40 Data adapters are a device that must be used with the CW sensors and probes on the new generation of Boonton RF power and Voltmeters. This device has an EPROM in it that holds the calibration data for one sensor or probe. The data adapter is serialized to match the corresponding sensor or probe that it holds the data for.