Fishfinder Sensitivity Settings - Raymarine a65 Installation And Operation Instructions Manual

Rotary Control
Range in and Range
out buttons
Slide the screen Up or
Down
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 dialog is displayed.
4. Adjust the setting to the require value.
5. Select the Range Shift menu.
6. Use the Rotary Control to adjust the Range Shift to the required
setting.
7. Select Back or press the Ok button to confirm the setting and
close the range shift dialog.
Fishfinder (dual frequency) independent range
When connected to a Raymarine CHIRP sonar module, the range
for frequency 1 and frequency 2 can be changed independently
or both at the same time.
Adjusting range on each frequency independently
1. Select Menu.
2. Select Range.
3. Select Adjust.
4. Select Frequency 1, Frequency 2 or Both.
5. Exit the menu.
6. Use the Range control to change the range for the selected
frequency.
Adjusting range using the touchscreen
You can adjust the range using the touchscreen.
From the fishfinder application, with the range set to manual:
1. Select an area on-screen for the frequency you want to adjust.
2. Slide your finger Up or Down to adjust the range for that
frequency.
Note: Frequencies can only be adjusted independently when
connected to a Raymarine CHIRP sonar module.
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15.14 Fishfinder sensitivity settings

• New c Series
• New e Series
The Sensitivity settings menu provides access to features and
functions which enhance what is displayed on screen.
Sensitivity options include:
• Gain
• New c Series
• Gain Mode — Only available when connected to a non-CHIRP
sonar module including the internal sonar module.
• New e Series
(excluding e7 and
• Color Gain
e7D
• TVG
• New e Series
• Color Threshold
• Power Mode
Sonar gain
The gain settings alter the way the sonar module 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 sonar module automatically adjusts the gain
setting to suit current conditions. Any adjustments made apply to all
fishfinder windows using that particular frequency.
For Raymarine sonar modules which do not have CHIRP capabilities
there are three Auto modes, each suited to different scenarios:
• Cruising (Low) 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.
• Trolling (Medium) is a slightly higher gain setting that displays
more detail. This is the default mode.
• Fishing (High) provides the most detail, but also displays the
most background noise and surface clutter.
Manual
If necessary you can set the gain controls manually, between a
value of 0% to 100%. This value should be set high enough to
see fish and bottom detail but without too much background noise.
Generally a high gain is used in deep and/or clear water; a low gain
in shallow and/or murky water.
The new values remain set even when you switch off the display,
they are applied to both the active window and any other fishfinder
windows with the same frequency.
Selecting the frequency for gain adjustments
When connected to a Raymarine CHIRP sonar module, the gain
for frequency 1 and frequency 2 can be changed independently or
both at the same time. If connected to a non-CHIRP sonar module
adjustments will be made to both frequencies simultaneously.
From the fishfinder application:
1. Select Menu.
2. Select Sensitivity Settings.
3. Select Gain.
4. Select Adjust.
5. Select Frequency 1, Frequency 2 or Both.
Adjusting fishfinder gain using the menu
The fishfinder gain setting can be accessed from the fishfinder
menu.
From the fishfinder application:
1. Select Menu.
2. Select Sensitivity Settings.
3. Select Gain.
4. Adjust the gain control to the required setting, or
The Gain adjust dialog is displayed
New a Series / New c Series / New e Series