Guralp Systems CMG-3TB - Manual (Page 49)

Operator's guide
The N and E streams are the “North/South” and “East/West”
components of the downhole instrument. The X stream is the
North/South component of the reference instrument.
If you are using a separate digitizer, the reference instrument
will appear on the North/South component of the other digitizer,
instead of the X stream. To select this at the same time as the
other streams, make sure Network is selected in the left-hand
pane of Scream!'s main window, to display all the streams from
your seismic network.
7. Double-click on one of the selected streams, or press ENTER. A
WaveView window will open.
8. Drag the streams across the window so that the reference stream
is at the top, the N stream in the middle, and the E stream at the
bottom.
9. Click the Pause icon to stop the traces moving, and zoom in and
out until you can see a suitable data range. You should use a
period of at least an hour, and preferably longer.
10.Hold down the SHIFT key and drag across the WaveView
window with the left button until all three streams are selected
for the whole range.
Make sure there are no gaps in the data you select. In Scream!
4.3 and later, the selection will be shown with hatched lines if
there is a gap:
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