... The probe sends a modulated DC signal, equivalent to the RF power, to the meter for measurement.The AT437C also has ... and performance of theAT437C make it an ideal solution for RF power measurements in education, field service and general laboratory use ... . It canalso be used with ATTENs range of RF attenuators for measurement of higher power levelsSPECIFICATIONSFrequency Range: 50MHz ~ ...