Raymarine a65 Operation Instructions Manual page 223

3. Select Intensity.
The slider bar control is displayed.
4. Adjust the control to the required value.
5. Select Back to confirm setting and close slider
bar, or
6. Select Auto to enable automatic Intensity control.
Setting auto Intensity offset
When connected to a CPx70 series sonar module
the Auto Intensity can be offset by +/–50%.
From the Sensitivity Settings menu:
1. Select Intensity.
2. Ensure Auto is selected.
3. Adjust the slider control to the required value.
The scrolling image will now track the automatic
setting by the offset value specified.
Color Gain
Non—CPx70 series, Traditional, CHIRP and Legacy
sonar modules use different colors to determine
the strength of an echo. You can adjust the color
intensity manually between 0% and 100% or set it to
automatic.
20% Manual Auto
The color gain control sets the lower limit for the
strongest echo color. All echoes with a signal
strength above this value are displayed in the
strongest color. Those with a weaker value are
divided equally between the remaining colors.
• Setting a low value produces a wide band for the
weakest color, but a small signal band for the
other colors.
• Setting a high value gives a wide band for the
strongest color, but a small signal band for the
other colors.
Adjusting the color gain
To adjust the Color gain on Traditional, CHIRP and
Legacy sonar modules follow the steps below.
From the Fishfinder application:
1. Select Menu.
2. Select Sensitivity settings.
3. Select Color Gain.
The slider bar control is displayed.
4. Adjust the control to the required value.
5. Select Back to confirm setting and close slider
bar, or
6. Select Auto to enable automatic Color gain
control.
Fishfinder application
Contrast
DownVision
shading to determine the strength of echoes. You
can adjust the contrast manually between 0% and
100% or set it to automatic.
20% Manual
Contrast
Contrast sets the lower limit for the strongest echo
shade. All echoes with a signal strength above this
value are displayed in the lightest shade. Those
with a weaker value are divided equally between the
remaining shades.
• Setting a low value produces a wide band for the
darkest shade, but a small signal band for the
other shades.
• Setting a high value gives a wide band for the
lightest shade, but a small signal band for the
other shades.
Adjusting the contrast
To adjust the contrast setting follow the steps below.
From the Fishfinder application:
1. Select Menu.
80% Manual
2. Select Sensitivity settings.
3. Select Contrast.
The Contrast slider bar control is displayed.
4. Adjust the control to the required value.
5. Select Back to confirm setting and close slider
bar, or
6. Select Auto to enable automatic contrast.
Surface filter
The Surface filter setting is available when
connected to a CPx70 series sonar module. The
control reduces the amount of noise / clutter
displayed near the surface by varying the gain
throughout the water column.
0%
The Surface filter can be set to automatic or can be
adjusted manually. In manual:
• a low value decreases the depth to which the filter
is applied and produces stronger targets / more
clutter near the surface.
• a high value increases the depth to which the filter
is applied and produces weaker targets / less
clutter near the surface.
TM and SideVision TM use monochrome
Auto Contrast
100%
80% Manual
Contrast
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