Simrad EK15 Reference Manual page 79

b
School (20 log TVG)
This gain setting offers weaker amplification close to the bottom. It has been
designed to provide the best echoes for schools. The physical size of a school allows
you to detect it even with reduced gain.
c
Fish (40 log TVG)
This gain setting provides larger amplification close to the bottom. It has been
designed to provide the best echoes from single fish.
d
Targets (40 log TVG)
Basically, this setting uses the same TVG amplification as
filtering and compensation is implemented. Only echoes detected and interpreted 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.
Note that this
Targets (40 log TVG)
transducers.
e
Target Mix (40 log TVG)
Basically, this setting uses the same TVG amplification as
compensation is implemented. Echoes detected and interpreted as single fish are
adjusted to their correct size according to their physical position in the beam.
Note that this
Target Mix (40 log TVG)
transducers.
f
User (Variable TVG)
This setting allows you to define your own TVG setting.
Related topics
• Selecting TVG gain in the Echogram dialog box on page 67
• Active menu on page 139
• TVG function on page 215
Procedure
1 Click the
Active
This icon is located under the
menu.
2 Locate the
TVG
3
Method 1:
Click [+] or [-] to choose TVG setting.
a
4
Method 2:
a Click the middle of the
Click on any TVG setting to select it.
b
351718/C
setting is only functional with split beam
icon.
menu. It is used to open the
Main
button.
button to open the submenu.
TVG
Fish
Fish
setting is only functional with split beam
Operational procedures
, but additional
, but additional beam
Active
77