TheVGLA20RPDCGPSVariableGainLineAmplifierisaoneinput,oneoutputdevicefeaturingavariablegainblockwith26dBofdynamicrange.ThefrequencyresponsecoverstheGPSL1 L2bandswithexcellentflatnessthroughoutmostoftheattenuationrange.Inthenormalconfiguration,theRFoutput(J1)passesDCfromtheconnectedGPSreceiverthroughtheamplifiertotheantenna,allowingtheGPSreceivertopowerboththeantennaandtheamp.