This is a demo code for the implementation of the method to calculate the LFP and MEG signals from Mean-Field models, introduced in Tesler et al., 2022. The main code to run the demo is in the file MF_LFP_MEG.py, which includes the simulations of the mean-field and the calculation of the LFP and MEG signals. The mean-field used for the simulations (AdEx mean-field) is described in Di Volo et al (2019). The file Param.in contains the set of parameters used for the simulation. For details of the method see Tesler et al, 2022.