Elektra Beckum NM20600A-A User Manual

MCE User’s Guide

MCE windows and dialogs

NM20600A-A

2004-05-17

25

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

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]

[Automatic]

The button resets the projection and bad channels to
default values. See “Bad channels and projections” on
page 6.

The buttons let you select either a single channel or filter
properties in the 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