Elektra Beckum MCE, NM20600A-A manual Units Hz

MCE User’s Guide			MCE windows and dialogs
	Table 4	Controls in the Pre-processing dialog
	Filter frame		The [Lowpass filter]toggle selects the filter. You can
			select the cutoff frequency or transition width with the
			corresponding text fields or sliders.The values are in Hz.
			Use the [Freq. response] and [Impulse response] but-
			tons to see the effect of the filter.
			Units: Hz
	Baseline frame		The [Baseline] toggle and the corresponding text field
			select the baseline period used to remove the DC offset
			and in automatic selection of the bad channels (p. 4).
			The [Detrend baseline] toggle and the corresponding
			text field select the other baseline used for removing
			slow drifts (p. 4).
			Units: ms
	[Decimate]		The toggle button and text field or slider select the
			down-sampling ratio. See section “Decreasing the com-
			puting time and file sizes” on page 5.
			Units: samples
	[Trim]		The toggle button and text field select the analysis
			period.
			Units: ms
	[Bad channels]		The toggle button and text field set the bad channels.
			Write the channel numbers to the text field with format
			‘MEG #### #### #### ####’
	[Apply projection]		If the toggle button is set, the noise projection defined in
			the data file is applied to the data and calculations.
	[Show all]		Opens the MEG data -dialog (p. 26).
	[Automatic]		The button resets the projection and bad channels to
			default values. See “Bad channels and projections” on
			page 6.
	Preview frame		The buttons let you select either a single channel or filter
			properties in the preview plot
	Preview plot		Shows the selected information; original data in red and
			processed data in blue. Left mouse button zooms in the
			image, the [rescale] button reverts to automatic scaling.
			X-axis units: ms in Channel and Impulse response
			mode, Hz in freq. response mode.
			Y-axis units: fT for magnetometers, fT/cm for gradiom-
			eters.
	[Cancel]		Closes the window
	[OK]		Applies the new values and closes the window

NM20600A-A 2004-05-17 25