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

How to select TVG gain

In the dialog you can choose which TVG gain you wish to use.
Echogram
The TVG can be chosen using the
button on the sub-menu.
Active
→ How to adjust the TVG gain on page 80.
1 Click the
Active
Click
2
Echogram
→ Echogram on page 158
3 On the
Echogram
•
Power (No TVG)
•
School (20 log TVG)
the bottom. It has been designed to provide the best echoes from schools.
•
Fish (40 log TVG)
bottom. It has been designed to provide the best echoes from single fish.
•
Targets (40 log TVG)
, but additional filtering is implemented. Only echoes detected and interpreted
Fish
as single fish are shown. The echoes are compensated for their physical position
in the beam (beam compensation). This means that fish in the outer region of the
beam are adjusted to correct size even though their echoes are weaker.
•
Target Mix (40 log TVG)
as , but additional beam compensation is implemented. Echoes detected
Fish
and interpreted as single fish are adjusted to their correct size according to their
physical position in the beam.
•
User (Variable TVG)
→ About TVG gain on page 205
→ Echogram; Echogram tab on page 161
4 Choose your TVG setting.
Note that the changes made in this tab will be default only be applied to the
currently selected "active" echogram (identified with a thick border). If you wish
to apply the changes to all the other echograms of the same type (for example all
bottom related echograms, click
5 Click to save the current settings and close the dialog.
OK
6. Note that this
Targets (40 log TVG)
7. Note that this
Target Mix (40 log TVG)
338106/A
Echogram
icon under the menu to open the
Main
to open the
Echogram
tab, observe the various TVG settings that can be applied.
: TVG gain is not implemented. This setting is hardly ever used.
: This gain setting provides the largest amplification close to
: This gain setting provides lower amplification close to the
: Basically, this setting uses the same TVG amplification as
: Basically, this setting uses the same TVG amplification
[7]
: This setting allows you to define your own TVG setting.
Apply To All
setting is only functional with split beam transducers.
setting is only functional with split beam transducers.
Operational procedures
dialog (described here), or with the
Active
dialog.
.
TVG
sub-menu.
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