Fishfinder Sensitivity Adjustments - Raymarine e7 User Reference

Note: When Range is in Auto mode using the Range Control
will display a confirmation pop up message before switching to
Manual range mode.
Using fishfinder range shift
The default setting adjusts the display to keep the seabed in the
lower half of the display window. Alternatively you can shift the
image within the current range. Changes to the range shift are
reflected in all fishfinder windows.
From the fishfinder application, with the Range Mode set to Manual:
1. Select Menu.
2. Select Range.
3. Select Range Shift.
The range shift menu is displayed.
4. Select the Range Shift menu.
5. Use the Rotary Control to adjust the Range Shift to the required
setting.
6. Press the Ok button, or select the Range Shift menu again to
confirm the setting.
Using the fishfinder

11.8 Fishfinder sensitivity adjustments

The Adjust Sensitivity menu gives you access to features and
functions which enhance what is displayed on screen.
Sensitivity options include:
• Gain Mode
• Auto Adjust
• Color Gain
• TVG
• Color Threshold
• Power Mode
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:
• Low (Cruising) is ideal for viewing fishfinder images with a
minimum of background noise as you are cruising to your fishing
spot. Only the strongest echoes are displayed.
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