Marport Scala2, User Manual

Page: 153 / 177

Scala2 | Version 5 | Maintenance and Troubleshooting
• Active wideband hydrophone with high/low gain: below -100 dBV
• Active narrowband: NC-1-04 below -80 dBV / NC-1-07 below -100 dBv
• Passive hydrophone: below -110 dBV
6. Scroll on the frequency or dBV scales to zoom in and out.
7. Under Peak , you can check:
• RealTime : the latest highest level of noise (dBV)
recorded and its frequency.
• Max : the highest level of noise recorded since the
beginning of the spectrum and its frequency.
8. Check that there is more than 12 dBV between the maximum noise level (dark blue line) and the
average noise level (cyan line) on the peak of sensor frequencies.
9. If you changed the configuration of the hydrophone or sensors, right-click the graph and click
Reset Max to reset the dark blue line showing the maximum level of noise.
10. To check the maximum, mean and real time measures of noise level at specific frequencies:
a) Right-click the FFT plot and click FFT Marker .
b) Click and drag the marker at a specific point.
Frequency and levels of noise at the marker position are displayed on the right side of the
graph.
11. Right-click the spectrum and click Pause if needed.
12. To save data recorded by the spectrum in a *.txt file, right-click the FFT plot and click Save
FFT .
| 152