How To Adjust The Tvg Gain - Simrad ES70 - REFERENCE MANUAL REV A Reference Manual

Simrad ES70
Enter the requested gain value between 20 and 120.
b

How to adjust the TVG gain

TVG means Time Varied Gain. The whole idea with TVG is that echoes from fish shall
have the same echo level (colour) independent of their depths. The ES70 has a TVG
range down to 15 000 meters, which for all practical purposes is unlimited. The ES70
does not have a TVG compensated receiver like most other echo sounders. In the
ES70 the TVG is implemented in software after the echoes from the receiver(s) have
been converted to digital format. In order to make this work the receiver must have
very large dynamic range.
The TVG can be chosen using the
sub-menu (described here).
Active
→ How to select TVG gain on page 73
1 Click the
Active
Locate the
2
TVG
3 Method 1:
a Click [+] or [-] to choose TVG setting.
4 Method 2:
a Click the middle of the
Click on any TVG setting to select it.
b
80
Echogram
icon under the menu to open the
Main
button.
button to open the sub-menu.
TVG
dialog, or with the
TVG
sub-menu.
Active
button on the
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