Raymarine c125 Installation And Operation Instructions Manual Download

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Gain

The gain settings alter the way the sonar module
processes background noise. 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 control determines the strength above
which echoes are displayed on-screen.

20% Manual Gain

Auto Gain

80% Manual Gain

Auto

In Auto mode the sonar module automatically adjusts
the gain setting to suit current conditions.

When connected to a Legacy sonar module or a
Traditional internal sonar module 3 Auto Gain modes
are available:

• Cruising (Low)

• Trolling (Med)

• Fishing (Fast)

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.

On-screen gain controls

Touch only and HybridTouch multifunction displays
have on-screen gain controls.

Selecting the on-screen gain control will display the
gain settings:

When connected to a Legacy sonar module or a
traditional internal sonar module the automatic gain
has 3 modes.

When connected to external CHIRP, external
Traditional or DownVision

sonar modules gain

modes are not required.

When in manual mode the slider bar control is
shown.

Note: SideVision

channels do not use

on-screen Gain controls The Gain setting can be
found in the

Sensitivity Settings

menu.

Enabling and disabling on-screen gain

controls

You can enable and disable the on-screen gain
controls by following the steps below.
On a touchscreen multifunction display, with the
relevant application displayed.
1. Select

Menu

2. Select

Presentation

3. Select

Gain Controls

Selecting Gain Controls will switch between
showing and hiding the on-screen controls.

Note:

When the on-screen Gain controls are set

to Hidden then the Gain settings can be accessed
directly from the application menu:

Menu > Gain

Adjusting gain manually using on-screen

controls

1. Select the on-screen

Gain

control located on the

left hand side of the fishfinder application.

2. Select the

Auto

box to switch between Auto and

Manual gain.

3. With

Auto

deselected, select and hold the

Slider

and move

Left

to decrease value or

Right

increase value.

Setting the auto gain mode using the

on-screen controls

1. Select the on-screen

Gain

control located on the

left hand side of the fishfinder application.

2. Select the

Auto

box so that a tick is displayed

in the box.

3. Select the required

Auto Gain Mode

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

The Gain adjust dialog is displayed

4. Adjust the gain control to the required setting, or
5. Select

Auto

A tick is displayed in the

Auto

box to signify

automatic gain is enabled.

Setting auto gain mode using the menu

When using a Legacy sonar module or a Traditional
internal sonar module 3 Auto Gain modes are
available. The Auto Gain mode can be set by
following the steps below.
From the Fishfinder application menu:

Fishfinder application

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