Simrad ME70 - REV C, Руководство оператора

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Operational procedures
Description
By default you have 64 or 12 colours available to present the echograms, a selection of
palettes, and several echogram colours. The colour scale is shown in each channel
window provided that you make the necessary adjustments to the fields in the view.
To change the colour scale parameters, place the cursor on top of the colours scale, and
right-click. The
Colour Scale
dialog box can then be opened from the short-cut menu
provided.
Procedure
1
Click the
Display
button to open the menu.
This button is located under the
Main
menu. It is
used to open the
Display
submenu.
2 Select palette to suit your requirements.
3
Select the number of colours you wish to use in your presentation.
4 Select echogram colours to suit your requirements
Which colour scale to use is mainly a personal preference based on ambient light
conditions, the nature of the echoes and your own experience.
Keep in mind that in the basic scale with 12 colours, each discrete colour represents
a 3 dB range of echo signal strength. This implies that the next colour is selected
every time the echo strength is doubled.
However, as the number of colours can differ, and dedicated colour schemes can be
used, this is not necessarily correct. A high numeric TVG value displays weak echo
signals properly while the stronger signals saturate into the darker colours. 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).
If you choose to use many colours, the resolution of the ME70 presentation is
greatly improved. It is then easier to distinguish the difference between the various
echoes of different size and/or target strength.
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