An amplifier system , comprising: a first signal pathway and a second signal pathway, each signal pathway having an input for a detected signal, wherein the detected signal comprises a target signal and high frequency interference, wherein the first signal pathway is configured to amplify the target signal and comprises, in order: a low pass filter, an amplifier, an analog to digital converter, and a microprocessor; wherein the second signal pathway is configured to detect the high frequency interference and comprises: a band pass filter or high pass filter electrically coupled to a radiofrequency detector, a comparator, and the microprocessor of the first signal pathway; characterised in that : the second signal pathway further comprises a digital to analog converter, wherein the comparator is configured to compare signal sizes of a first signal entering from a first leg and a second signal entering from a second leg, the first leg of the comparator being electrically coupled to an output from the radiofrequency detector, and the second leg being electrically coupled via the digital to analog converter to an output from the microprocessor; and wherein the microprocessor is electrically coupled to an output from the comparator and is configured to detect the presence of high frequency interference within the detected signal when the first signal is greater than the second signal. a first signal pathway and a second signal pathway, each signal pathway having an input for a detected signal, wherein the detected signal comprises a target signal and high frequency interference, wherein the first signal pathway is configured to amplify the target signal and comprises, in order: a low pass filter, an amplifier, an analog to digital converter, and a microprocessor; wherein the second signal pathway is configured to detect the high frequency interference and comprises: a band pass filter or high pass filter electrically coupled to a radiofrequency detector, a comparator, and the microprocessor of the first signal pathway; characterised in that : the second signal pathway further comprises a digital to analog converter, wherein the comparator is configured to compare signal sizes of a first signal entering from a first leg and a second signal entering from a second leg, the first leg of the comparator being electrically coupled to an output from the radiofrequency detector, and the second leg being electrically coupled via the digital to analog converter to an output from the microprocessor; and wherein the microprocessor is electrically coupled to an output from the comparator and is configured to detect the presence of high frequency interference within the detected signal when the first signal is greater than the second signal. the second signal pathway further comprises a digital to analog converter, wherein the comparator is configured to compare signal sizes of a first signal entering from a first leg and a second signal entering from a second leg, the first leg of the comparator being electrically coupled to an output from the radiofrequency detector, and the second leg being electrically coupled via the digital to analog converter to an output from the microprocessor; and wherein the microprocessor is electrically coupled to an output from the comparator and is configured to detect the presence of high frequency interference within the detected signal when the first signal is greater than the second signal. <EOS>