To filter out the input noise outside the frequency of interest, a bandpass filter (BPF) needs to be added before the Log input. This can either be done by connecting an external bandpass filter between the input signal and the Log input (J_LOG_IN) or using the onboard bandpass filter provided on the EVM. Note that the RLC components of the BPF need to be populated by the user as per the filter centre frequency and quality factor requirement. To use the onboard BPF, short R7 and R10 and open R5 and R6.