Operational procedures
How to establish vertical markers
The echograms provided by the ES70 may contain additional information. The following
lines, markers and annotations can be enabled:
•
on page 54
•
on page 54
•
on page 55
•
on page 55
•
on page 56
•
on page 56
•
on page 57
•
on page 57
•
on page 57
•
on page 58
This procedure explains how you can enable one or more vertical markers in the current
echogram.
1
Click the
Active
icon under the
Main
menu to open the
Active
menu.
→
on page 107
2
Click
Echogram
to open the
Echogram
dialog.
3
On the
Lines
tab, observe the various vertical markers that can be enabled.
Note
The annotations are controlled on the
Annotation
dialog, but to place the annotations
in the echogram, you must enable them in the
Echogram
dialog.
4
Enable the vertical markers you wish to see.
5
Click
OK
to save the current settings and close the dialog.
How to select TVG gain in the Echogram dialog
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 made 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.
343539/B
85
Summary of Contents for ES70 - DOWNLOAD AND INSTALLATION REV B
Page 2: ......
Page 128: ...ISBN 13 978 82 8066 118 0 2010 Kongsberg Maritime AS ...
