Guralp Systems CMG-3T - Manual (Page 25)

Operator's guide
top left of the window or the cursor keys.
Drag the calibration stream Cn up the Waveview window, so
that it is at the top.
4. If the returning signal is saturated, retry using a calibration
signal with lower amplitude. Repeat until the entire curve is
visible in the Waveview window.
5. If you need to scale one, but not another, of the traces, right-
click on the trace and select Scale.... You can then type in a
suitable scale factor for that trace.
6. Pause the Waveview window by clicking on the icon.
7. Hold down SHIFT and drag across the window to select the
calibration signal and the returning component(s). Release the
mouse button, keeping SHIFT held down. A menu will pop up.
Choose Broadband Noise Calibration. This option runs a script
called bbnoisecal which automatically performs appropriate
averaging to reduce the effects of aliasing and cultural noise.
8. The script will ask you to fill in sensor calibration parameters
for each component you have selected.
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