Patent ID: 8630591

Claim:
A method for calibrating a receiver in a radio frequency (RF) system connected with a device under test (DUT) configured to receive at least one input signal from the RF system and output at least one response signal, comprising: setting a drive level of the RF system; obtaining a plurality of measurements at the set drive level, wherein two or more of the measurements are obtained at different gain states of the at least one response signal received at the receiver; wherein obtaining the plurality of measurements at the set drive level includes measuring a first input signal and measuring a first output response signal, in a first gain state, calculating a first ratio comprising the first output response signal divided by the first input signal, measuring a second input signal and measuring a second output response signal, in a second gain state, and calculating a second ratio comprising the second output response signal divided by the second input signal; and calculating a calibration factor for the receiver based on the measurements.