406388/F
239
Audio in/out
The audible alarm signal can be controlled using this function.
Related topics
Setting up the sensors alarms, page 91
Spectrum dialog box
The TV80 offers a spectrum analyser that shows the signals from each hydrophone. The
Spectrum
dialog box presents an overview of the current hydro-acoustical conditions.
You can use this function to "see" the signals from each hydrophone, as well as the
background noise.
How to open
This dialog box is opened from the
Setup
menu.
Description
The quality of the acoustic communication link between the sensors and the receiver
can be challenged by noise. When noise appears in the same frequency range as the
sensors are using for their communication, the resulting information may be unstable or
unreadable. The graph in the
Spectrum
dialog box provides you with information about
the background noise and the signal strength in the selected frequency band. With this
information you can identify noise and find the "cleanest" frequencies.
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