This Variable Attenuator DC Block (VATTENDCB) is a one input, one output attenuator that operates with a variable attenuation range that can be user selected via a potentiometer control. This unit provides between 3 – 30dB (typical) of attenuation in a miniaturized housing. The frequency response covers the GPS L1/L2 and GLONASS bands with excellent flatness. In the normal configuration, the RF output (j1) accepts DC voltage grom the connected GPS receiver to power the attenuator while the antenna input (ANT) is DC blocked.