image within the current range. Changes to the range shift are
reflected in all fishfinder windows.
1. Press the
RANGE
control to open the range toolbar.
2. Press the
RANGE
softkey repeatedly until the MAN option is
selected.
3. Press the
RANGE SHIFT
softkey.
4. Select your desired setting using the trackpad.
5. Press
OK
.
12.6 Fishfinder presentation options
The
PRESENTATION
softkey gives you access to a features
and functions which enhance the fishfinder display and provide
additional on-screen functionality.
Presentation options include:
•
Gain
settings to enhance display clarity.
•
Power
to the transducer.
•
VRM
features for measuring depth distance.
• Dual frequency
view
options.
•
Scroll
pause and resume.
Sonar gain
The gain settings alter the way the DSM processes background
noise (also called clutter). Adjusting the gain settings can improve
the sonar image, however for optimum performance in most
conditions, we recommend that you use the auto settings.
The gain adjusts the return threshold (echo strength) above which
the fishfinder will show an object on the screen.
There are two gain modes:
• Auto
• Manual
Auto
In Auto mode, the DSM sonar automatically adjusts the gain setting
to suit current conditions. Any adjustments made apply to all
fishfinder windows using that particular frequency.
There are three Auto modes, each suited to different scenarios:
Using the fishfinder
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