filename	PSG filename
id1	subject identification
artefact_group_name_list	List of groups and names of the artefact excluded from the Power Spectral Analysis
channel_label	The label of the channel.
channel_fs	The sampling rate (Hz) of the channel.
channel_artefact_count	The number of artefacts marked on the channel (i.e. number of events).
fft_win_sec	The window length in sec used to perform the FFT.
fft_step_sec	The step in sec between each start point of the window used for the FFT.
fft_win_count	The number of fft windows in selected annotations.
fft_win_valid_count	The number of valid fft windows in selected annotations.
fft_win_annot1_count	The number of fft windows in selected annotation 1.
fft_win_valid_annot1_count	The number of valid fft windows in selected annotation 1.
fft_win_annot2_count	The number of fft windows in in selected annotation 2.
fft_win_valid_annot2_count	The number of valid fft windows in selected annotation 2.
fft_win_annotx_count	The number of fft windows in selected annotation x.
fft_win_valid_annotx_count	The number of valid fft windows in selected annotation x.
freq_low_Hz	The low frequency (Hz) of the mini band.
freq_high_Hz	The high frequency (Hz) of the mini band.
act_total	The total spectral power (uV^2)
act_annot1	The spectral power (uV^2) in selected annotation 1.
act_annot2	The spectral power (uV^2) in selected annotation 2.
act_annotx	The spectral power (uV^2) selected annotation x.