Kongsberg Simrad TV80, Справочное руководство

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Inspecting the quality of the reception
The TV80 offers a spectrum analyser that shows the signals from each hydrophone. The
TV80 allows you to inspect the quality of the received signals from the relevant receiver
units. The graph in the
Spectrum
dialog box provides you with information about the
background noise and the signal strength in the selected frequency band.
Context
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. On the
top and bottom parts of the graph, the channel identifiers correspond to the relevant
receiver channel. With the channel identifiers you can easily see in which channels you
have signals and noise.
• The upper scale (PI) identifies the channels for the PI Family receivers.
• The bottom scale (SR) identifies the channels for the SR Family receivers.
The graph plots data using a 16 colour palette. Red colour corresponds to the maximum
value defined, while blue is the minimum.
Note
The
Spectrum
dialog box can only be used with SR type receiver units:
• Simrad SR15
• Simrad SR70
Getting started