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Chapter 4: Menu Operation 47
Figure 4-2: The Three Modes of A-Scope
GAIN MODE...
The sounder provides GAIN controls to reduce background noise and
determine how different strength echoes are shown. Automatic adjustment
of each of these parameters is available or you can manually adjust the
settings using the trackpad.
Note: Automatic Gain settings take advantage of the hardware’s advanced
digital technology. As a result, the sounder typically performs better in auto-
matic mode than manual. For better performance Raymarine recommends
selecting AUTO mode for all Gain options.
Note that this menu item is in all caps and in followed by an ellipsis (...). This
is an indicator that the setting contains sub-menus. Gain Mode is comprised
of seven sub-menus.
• Gain
• Color Gain
• Time Variable Gain (TVG)
40
20
ft
A-SCOPE Mode ON-1 Mode ON-2 Mode ON-3
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