Simrad 38-9 - REV B Installation Manual download pdf (Page 90)

Reference manual

857-160970 / Rev.H

Colour Scale

The Colour Scale dialogue box is opened when you right-click

on the colour scale in the Header view.

This dialogue controls the mapping of echo strength into one out

of 12 colours, light blue for weak signals and dark brown for

strong signals. Each discrete colour represents a 3 dB range of

echo signal strength implying that the next colour is selected

every time the echo strength doubles.

Parameters

A high numeric value displays weak echo signals properly while

the stronger signals saturate into dark brown colour. A low

numeric value displays strong echo signals properly. Weak

signals below the lower limit of the colour scale are not

displayed (the display background colour is used).

School Gain - This parameter controls the display sensitivity of

the echo sounder down to the detected bottom depth when

School Gain is selected in the Echogram dialogue box. A

numeric value of 70 sets the lower limit of the echogram colour

scale equal to a volume backscattering strength of -70 dB.

Fish Gain - This parameter controls the display sensitivity of

the echo sounder down to the detected bottom depth when Fish

Gain is selected in the Echogram dialogue box. A numeric

value of 50 sets the lower limit of the echogram colour scale

equal to a target strength of -50 dB.

1 2 ... 85 86 87 88 89 90 91 92 93 94 95 ... 135 136

No comments

Simrad 38-9 - REV B Installation Manual Page 90