abem Terraloc Pro 2 - Page 55

ABEM Terraloc Pro 2
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Graph min
[dB]
- The minimum value of the noise monitor scale
Graph max
[dB]
- The maximum value of the noise monitor scale
Peak Hold
time [s]
- The noise monitor will show red markings to show noise peak
values. The peak hold time sets how long the markings will be
shown before disappering
Threshold
level [dB]
- Sets a threshold level in decibels. Size depends on amplitude
scale of the noise monitor. When the monitored signal exceeds
this threshold level, a warning is displayed in the noise monitor
window
Show noise
- Press this button to directly display the noise monitor. Press
<ESC> to close it
Table 11 Noise Monitor settings
4.6.5.4 The Filters Settings Category
These settings control how SeisTW filter data to be sampled (Figure 46).
• Opening the Filters Setup (Acquisition Setup dialog with the Filters tab selected)
― Press <4>
Figure 46 The Acquisition Setup Dialog; Filters tab selected
Signals usually contain noise from sources such as wind and traffic. This noise often
has low frequency. Analog filter removes these frequencies from the signals. However,