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Common procedures
How to control the TVG
The TVG (Time Varied Gain) controls the gain in the signal
amplier. The gain is weakest just after the ping, and increases
in accordance with time (and therefore range). A number of
standard gain curves are available, as well as
Off and Auto.
By using TVG, the gain is adjusted in such way that a school
of sh with a certain size and density will be presented with
approximately the same strength on the screen in any position
inside the regulated TVG range.
1 Click the
Horizontal or Vertical tabtoopentherespective
menu.
2 Click the
TVG button to adjust the parameter.
Click the left side of the button to decrease the parameter
value.
Click the right side of the button to increase the
parameter value.
Click the middle of the button to open the parameter
dialogue.
Mode procedures
This section explains how to choose operational modes, and how
to set up the
Mode buttons on the SH40 Sonar Control Unit.
How to select operational mode
Your SH40 sonar is equipped with several operational modes.
Observe these procedures to choose the mode best t for your
current operations.
UsingtheSonarControlPanel:
1 Locate the Mode eld on your Sonar Control Panel
2 Press one of the four buttons to choose mode.
You can only choose from four different modes using these
buttons, but you can decide which modes these are.
Using the menu system:
1 Locate the Mode button on the top of each menu.
2 Click the
Mode button to choose operational mode.
Click the left side of the button to scroll down the list
of available modes.
Click the right side of the button to scroll up the list of
available modes.
Click the middle of the button to open the parameter
dialogue for direct access to the requested mode.
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