Radar Adjustments: Non-Hd Digital Radomes - Raymarine a65 Installation And Operation Instructions Manual

13.10 Radar adjustments: non-HD digital radomes

You can use the gain presets and other functions to improve the quality of the radar picture.
The following settings apply to non-HD digital radomes and are
available from the Radar menu:
Menu Item
Rain
Adjust Gain
Adjusting radar anti rain clutter
From the radar application:
1. Select Menu.
2. Select Rain.
The Rain clutter slider bar control is displayed.
3. Adjust the Rain clutter slider bar control to the appropriate setting
(between 0% and 100%), or
4. Select the Off box so that a tick is placed in the box to turn off
anti rain clutter control.
Adjusting the radar FTC function
From the radar application:
1. Select Menu.
2. Select Adjust Gain <Mode>, where <Mode> shall be the Auto
Gain mode already selected.
3. Select FTC.
The FTC slider bar control is displayed.
4. Adjust the FTC slider bar control to the appropriate setting
(between 0 and 100%), or
5. Select the Auto box so that a tick is placed in the box for
automatic FTC control.
Adjusting radar anti sea clutter
From the radar application, with the required Auto Gain Mode
selected:
Using radar
Description
The radar scanner detects echoes from rain or
snow. These echoes appear on screen as countless
small echoes continuously changing size, intensity
and position. Turning the rain clutter function On
suppresses the bulk effect of rain returns from around
your vessel, making it easier to recognize other
objects. You can adjust the intensity of this setting
between 0 and 100%.
Enables you to adjust the sensitivity of the radar
reception. In some situations, adjusting the sensitivity
may improve the clarity of the radar picture. The
following settings are available:
• Gain
• FTC — Enables you to remove areas of clutter at
a distance from your vessel. It also helps you to
distinguish between two very close echoes on the
same bearing, which may otherwise merge and
appear as one echo. You can adjust the intensity
of the FTC function between 0 and 100%:
– A higher setting shows only the leading edge of
large (rain clutter) echoes, while the effect on
smaller (ship) echoes is only slight.
– A lower setting reduces background noise and
fill-in returns from land and other large targets.
• Sea — Enable you to quickly select pre-configured
settings to achieve the best picture in different
situations. Each of the gain presets has a gain
function, which is set to automatic mode by default.
Raymarine strongly recommends the use of these
presets to achieve optimum results. However, you
can adjust this gain manually if required.
• Auto Sea Mode
1. Select Menu.
2. Select Adjust Gain <Mode>, where <Mode> shall be the Auto
Gain mode already selected.
3. Select Sea: .
4. The Sea clutter slider bar control is displayed.
5. Adjust the Sea clutter slider bar control to the appropriate setting
(between 0 and 100%), or
6. Select the Auto box so that a tick is placed in the box for
automatic sea clutter control.
Selecting radar auto gain mode
These presets require a digital radar scanner.
From the radar application:
1. Select Menu.
2. Select Gain Mode.
3. Select Harbor, Costal or Offshore as appropriate.
The option is ticked and the display changes to reflect the new
mode.
Options
• On — enables the Rain function and allows you to
adjust the setting between 0 and 100%.
• Off — disables the Rain function. This is the
default.
Gain
• Auto — the preset operates in automatic mode.
This is the default.
• Man — allows you to manually adjust the intensity
of the gain, from 0 to 100%.
FTC
• On — enables the FTC function and allows you to
adjust the setting between 0 and 100%.
• Off — disables the FTC function. This is the
default.
Sea
• Auto— the preset operates in automatic mode.
This is the default.
• Man— allows you to manually adjust the intensity
of the sea gain, from 0 to 100%.
Auto Sea Mode
• Harbor — this is the default mode. This setting
takes account of land clutter so that smaller
targets, like navigation buoys, are not lost.
• Coastal — accounts for the slightly higher levels
of sea clutter you might encounter out of harbor
and adjusts the radar display accordingly.
• Offshore — Automatically adjusts for high levels
of sea clutter.
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