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Plus Series Fishfinders
Adjusting Display
Gain (Sensitivity)
Note: The color LCD Fishfinder also provides a COLOR THRESHOLD control
to reduce the number of colors displayed. You can use COLOR THRESHOLD
with COLOR GAIN to determine how echoes are displayed.
The Fishfinder 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.
STC
S TC (Sensitivity Time Control) reduces surface clutter by reducing the gain in
the top 30-40 ft of the display: A low STC value has little effect on gain in
shallow water; a high S TC value decreases the gain in shallow water, thus only
the strongest echoes are displayed.
This function is useful for reducing background noise, caused by air bubbles
and floating debris, that often appears in shallow water.
➤ To adjust a parameter:
1. Press the GAIN key, the gain sliders are displayed. The last used slider is
highlighted (displayed in inverse video) to show that it is selected.
2. If necessary on a split frequency display, press the GAIN ADJUST soft key to
select the required frequency for adjustment.
Note: On a single frequency display you adjust the gain for the displayed fre-
quency.
3. If necessary, press the required soft key so the slider is highlighted.
Press it again, if necessary, to toggle between AUTO and MANUAL adjust-
ment.
4. Use the trackpad to move the slider up or down. You can press and hold the
trackpad to move the slider quickly rather than in single steps.
The image on the screen changes as you move the slider and the value is
indicated in the slider.
Note: Because the changes to the settings are made immediately, you cannot
revert to the previous settings by pressing CLEAR.
5. When you have set all the controls to the levels you require, press ENTER
or CLEAR to return to the default display.
MULTIGAIN
STC
25%
MULTI
GAIN
GAIN
ADJUST
200 50
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