7
CONTRAST
–
Contrast is the darkness or lightness of the display. Both your
viewing angle and the ambient temperature affect the contrast.
LIGHT
–
The 2100 has a display backlight for use when there is not enough
daylight to view the screen. The backlight also generates heat and can
be used to help warm the display in cold weather.
GAIN
–
The gain control sets the graph’s overall sensitivity to echoes.
Generally, a higher gain number means that more fish and structure are
shown. Lowering the gain may help reduce interference caused by
trolling motors and other sources of noise.
Tip:
Use as much gain or as little gain as you want, but remember that
the bottom depth readout may not work under all settings.
SCC
–
The screen clutter control reduces undesirable signals on the graph.
Such signals may include surface clutter (created by turbulence around
the transducer), thermocline, air bubbles, algae bloom, and etceteras.
Turn on SCC if these signals inhibit the display of the bottom.
ICE MODE
–
The ice fishing mode control overrides the screen clutter control
and increases the gain significantly to help display smaller objects.
Although this improves the picture in most ice fishing situations, it may
increase clutter and is normally turned off for other types of fishing.
RANGE
–
The bottom range control allows you to set how deep the bottom
graph will display. The bottom range is displayed in the upper-left
corner of the graph (see Figure 2). In automatic mode, the 2100 sets the
graph range to graph from the water surface down to just below the
bottom.
This symbol in the upper-left corner of the display indicates
automatic range mode.
You may want to set the range manually if the bottom reading becomes
unreliable or if you are only interested in seeing the top portion of the
water. In this case, the
symbol will disappear indicating that you
set the range yourself.
In bottom-tracking mode, the 2100 sets the range to graph the 10ft (3m)
of water just above the bottom. This zoomed-in graph is useful for
determining bottom features and for marking fish lying close to the
bottom.
This word in the upper-left corner of the display indicates
bottom-tracking mode.
Press and release
the
or
button to select automatic or bottom-
tracking mode, or
press and hold
or
to set a manual range.
