Simrad 38-9 - REV B Installation Manual download pdf (Page 28)

Display views

857-160970 / Rev.H

If you place the cursor in the coordinate system, a small yellow

label will appear to give you a detailed readout of the target

strength in dB at the cursor’s position. This target strength

indicates the fish length (in cm or inches) or fish weight (in kg).

Related topics

→ Getting started, page 31.

→ Colour Scale, page 81.

Echogram and Range

The Echogram and Range view consists of an Echogram field

to the left and a Range field to the right. These are separated by

the vertical range axis. The Echogram field contains

information about the acoustical values, while the Range field is

used for specifying the range used in the Echogram field. The

settings in the Colour Scale is used to present the information.

In the echogram field, the presentation can be of different views.

This can be selected in echogram dialogue bok as 1x, 3x, 5x, or

all. Fore examle: If a 20 tranducer system; all selected, 20

echogram in the echogram filed.

When you place the cursor in the Echogram field, you can use

the mouse wheel to modify the gain setting, and hence the

display colour sensitivity. Each click of the wheel corresponds

to a 1 dB change. The same gain setting is available from the

Colour Scale dialogue box.

Whenever the cursor is located within the Echogram field, a

small yellow label is visible. The label provides the following

information:

• Left: Depth at the cursor position

• Middle: Diameter coverage from the transducer beam

• Right: Current gain setting

To change the range, you can also use the mouse wheel. Place

the cursor inside the Range fieldtodothis:

• In a surface related echogram you will modify the range,

while for a bottom related echogram, you will change the

start range.

• If you press the left mouse button while you use the mouse

wheel, the surface echogram will change its start value, while

the bottom related echogram will change its range.

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Simrad 38-9 - REV B Installation Manual Page 28