Color Gain - Raymarine hsb2 series Owner's Handbook Manual

Chapter 4: Fishfinder Operations
The color bar on the right hand side of the display, when set to ON in the
Fishfinder Set Up menu (see Section 7.4), shows the colors being used, with
strongest echo color at the top and the weakest echo color at the bottom. The
height of each bar indicates the range of signal strengths displayed in that
color.
If you change the settings, the new GAIN, COLOR GAIN, or STC values and mode
(auto or manual) remain set even when you turn off the display. However, any
fine-tuning you make to auto-gain is removed when the unit is powered off.
AUTO
Gain
80%
The GAIN, or sensitivity, of the display adjusts background noise by varying
MULTI GAIN
echo strength for display. The value of the GAIN control determines the
GAIN
strength above which echoes are displayed: If the gain is low only the
strongest echoes are displayed; as the gain is increased more, but weaker
echoes (from, say air bubbles) are displayed.
The display GAIN 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 fishfinder provides automatic or manual GAIN adjustment. Automatic
adjustment is based on depth and water conditions. As conditions change the
auto-gain adjusts to display fish with a minimum of background noise. You
can manually add a bias to the auto-gain setting. If you select manual
adjustment, you will need to re-adjust the gain as conditions change.

Color Gain

The COLOR GAIN determines how echoes of different strengths are displayed.
MULTI GAIN
Three shades of gray (monochrome LCD) or seven colors (color LCD) per
palette are available and the echo strengths are divided into three
(monochrome) or seven (color) bands to correspond with each shade of gray/
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.
4-5