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3. ECHO SOUNDER OPERATION
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3.2 Adjusting the Echo Sounder Image from the
Sounder Settings Dialog Box
The echo sounder settings dialog box contains all the controls for adjustment of
the echo sounder image. To display this box, click the echo sounder image with
the left mouse button and then choose Show Sonar Settings from the View
menu.
Echo sounder settings dialog box
3.2.1 Choosing the display range
The Range combo box lets you choose desired display range, from 50, 100, 150,
200, 250 and 300 (meters) or equivalent feet/fathoms.
3.2.2 Adjusting data gain
Adjust the gain from the Data Gain combo box. The gain range is 0-100(%).
Data gain is used to increase or decrease the intensity (color levels) of the
vertical sonar and sounder images, collectively.
3.2.3 Adjusting echo sounder gain
Choose the ES Gain combo to adjust the gain of the connected echo sounder.
The gain can be adjusted from 0dB to 20dB in 1 dB increments.
3.2.4 Freezing the display
Click the HOLD button to freeze the system from interrogating sensors and
freeze the data display. The echo sounder display shows “HELD” when the
image is frozen. Click the button once again to release the freeze condition and
restart the echo sounder. This feature is useful for inspecting an image or taking
a picture of the display.