The Gigatronics 80601A is a CW Power Sensor. The 80601A has a frequency range of 0.01 to 18 GHz and a power range of -67 dBm to + 20 dBm. VSWR of the Gigatronics 80601A Power Sensor is 1.12: 0.01 to 2GHz, 1.22: 2 to 12.4GHz and 1.29: 12.4 to 18GHz. It is compatible with the 8540C series and 8650A series of Power Meters.