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MCE User’s Guide Selecting the data file and pre-processing
NM20600A-A 2004-05-17 7
In practice, you should first specify the baseline period and then press the
[Automatic] button, and then add bad channels that are not included. Because
the selection of the bad channels slightly affects the projections and the projec-
tions affect the selection of the noisy channels, resetting the projections repeat-
edly may result in different channels being marked bad at the second time, if
their noise levels are near the limits.
A handy way of screening for possible bad channels is to open the MEG Data
dialog (p. 26) by pressing the [Show all] button. All the channels will be shown,
overlaid based on the location. If one of the waveforms seems to be an outlier,
right-click it at the time of the maximum difference, and the channel ID is
shown.