Raymarine Marine GPS System User Manual page 133

RayTech Navigator User's Guide
To adjust the Gain:
Adjusting Color Gain
The Color Gain determines how echoes of different strengths are
displayed. Seven colors per palette are available and the echo strengths
are divided into seven bands to correspond with each shade of color.
The Color Gain control sets the lower limit for the top color band:
All echoes with a signal strength above this value are displayed in the
strongest shade/color. All echoes weaker than this value are divided
equally between the remaining shades/colors.
Setting a low value produces small band for the strongest color, but a
wide 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.
The Fishfinder also provides automatic or manual Color Gain
adjustment. Automatic adjustment displays colors based on current
conditions, with as many colors as possible, while minimizing noise
and clutter. As conditions change the auto-color gain adjusts. You can
manually add bias to the auto-color gain settings. If you select manual
adjustment, you will need to re-adjust the gain as conditions change.
To adjust the Color Gain:
5-42
1. On the Pathfinder Panel, click
buttons appear.
2. Click the Gain button for the appropriate frequency:
or
50KHz 200KHz
3. Click the large button to toggle between Auto or Manual
Gain.
4. Click the arrow keys to adjust the level.
1. On the Pathfinder Panel, click
2. Click the Gain control for the appropriate frequency:
50KHz Color Gain
3. Click the large button to toggle between Auto or Manual Gain.
4. Click the arrow keys to adjust the level.
. The Gain function
GAIN
.
.
GAIN
or
200KHz Color Gain
.