Adjusting the TVG (Time Variable Gain) setting
You can adjust the time variable gain for each sonar application in the TVG Setup dialog box.
Context
TVG (Time Variable Gain) compensates for the loss of acoustic energy due to geometric spread and absorption.
Procedure
1 Click SetupConnect to start the Sonar Head.
2 Select the sonar application you wish to configure from the Sonar applications list on the top bar.
Note
Each sonar application has its own TVG profile.
3 Click the TVG button.
Image
This button is located on the tool bar.
4 Drag the sliders to adjust the A, B, C, and L Factors.
Click the arrow buttons to make small adjustments.
5 Click Apply to save the settings.
Note
If you are using a high-frequency M3 Sonar, the TVG profiles will not be saved when closing the software — default values will apply when switching to a new frequency or when starting up the M3 software.