A geophysical data acquisition system, comprising: at least one geophysical sensor (12, 14, 16, 18), the at least one geophysical sensor having associated therewith a signal generator configured to generate a signal corresponding to a type of the at least one geophysical sensor (12, 14, 16, 18); and at least one geophysical signal acquisition unit having a plurality of input channels and a central processor, the at least one geophysical sensor (12, 14, 16, 18) in signal communication with one of the plurality of input channels, the plurality of input channels each being in communication with the central processor, the central processor being configured to interrogate the type of sensor coupled to the respective one of the input channels from the signal received at the respective one of the input channels, the at least one signal acquisition unit including amplification, filtering and digitizing circuits automatically configurable in response to the type of sensor identified by the detected signal, characterized in that it further comprises a waveform generator associated with the at least one geophysical signal acquisition unit, the waveform generator configured to generate current having a selected waveform, the waveform generator in signal communication with at least one of the input channels, wherein the waveform generator is configured to detect selected types of noise in signals communicated by the at least one geophysical sensor (12, 14, 16, 18), the waveform generator configured to generate a waveform corresponding to an inverse of the selected type of noise and apply the inverse to the input channel associated with the at least one geophysical sensor (12, 14, 16, 18), and wherein the selected type of noise comprises a bias voltage present on an electric field sensor, and wherein the waveform generator is further configured to generate a DC offset voltage to compensate for the bias voltage in response to the type of sensor identified by the detected signal. at least one geophysical sensor (12, 14, 16, 18), the at least one geophysical sensor having associated therewith a signal generator configured to generate a signal corresponding to a type of the at least one geophysical sensor (12, 14, 16, 18); and at least one geophysical signal acquisition unit having a plurality of input channels and a central processor, the at least one geophysical sensor (12, 14, 16, 18) in signal communication with one of the plurality of input channels, the plurality of input channels each being in communication with the central processor, the central processor being configured to interrogate the type of sensor coupled to the respective one of the input channels from the signal received at the respective one of the input channels, the at least one signal acquisition unit including amplification, filtering and digitizing circuits automatically configurable in response to the type of sensor identified by the detected signal, characterized in that it further comprises a waveform generator associated with the at least one geophysical signal acquisition unit, the waveform generator configured to generate current having a selected waveform, the waveform generator in signal communication with at least one of the input channels, wherein the waveform generator is configured to detect selected types of noise in signals communicated by the at least one geophysical sensor (12, 14, 16, 18), the waveform generator configured to generate a waveform corresponding to an inverse of the selected type of noise and apply the inverse to the input channel associated with the at least one geophysical sensor (12, 14, 16, 18), and wherein the selected type of noise comprises a bias voltage present on an electric field sensor, and wherein the waveform generator is further configured to generate a DC offset voltage to compensate for the bias voltage in response to the type of sensor identified by the detected signal.