Simrad SP70
98
850--164186 A
AGC (Automatic Gain Control)
The AGC button is located in the following index menus:
• Horizontal
• Ve rt ical
• Echosounder
• Second Ping
• Trawl
Figure 81 -
AGC submenu
The AGC (Automatic Gain Control) adjusts the gain in the
sonar’s preamplifier dependant on the strength of the incoming
echo signal. The result is a filter effect, reducing noise and
reverberation. As show in the menu, the AGC has four different
settings:
• OFF - no gain adjustment
• WEAK - slow gain adjustment
• MEDIUM - medium fast gain adjustment
• STRONG - fast gain adjustment
Note that the AGC is sensing the echo strength in five directions,
and use this as a basis for common adjustment for all the receiver
beams.
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