Horizon Fishfinder User Manual
12
Setting the gain
•
Press the page key until the gain menu is
displayed
•
Press either the
key or the
key to
move the pointer to the desired mode of
operation
•
If the desired mode is Manual then use the
V
or the
^
key to adjust the value to the
desired level
•
Press the power key to accept the choice
and return to normal display mode
•
If the desired mode is Auto then use the
V
or the
^
key to adjust the value to the
desired level. In Auto mode the gain will be
controlled to show the same bottom detail
irregardless of depth
•
If the desired mode is Top or Bottom then
use the
V
or the
^
key to adjust the limit
value to the desired level
•
Press the power key to accept the choice
and return to normal display
Gain function
The gain is a measure of ability to receive weak
signals. The higher the gain setting, the better the
unit is able to pick up weak return signals. Deep
water operation requires the gain to be set to a
higher value due to loss of signal in the water.
There are two gain modes that can be selected,
Manual and Auto.
If Manual is selected then a gain setting from 0
to 15 must also be entered. This will be the value
of gain that is always used when displaying
information on the screen. A low gain number may
be suitable in shallow water but will need to be
increased for deep water operation
If Auto is selected then the gain will automatically
vary as the water depth changes. This feature is
particularly useful if you are fishing areas where
the depth changes suddenly. In Auto mode, you
can set the auto-gain value to provide a consistent
image of the bottom, regardless of the bottom
type. A low auto-gain setting will cause a thin
bottom image to be displayed. A high auto-gain
setting will result in a thick bottom image. This
adjustment is particularly useful with a weak
return signal from a muddy or silty bottom.
Normally, in these conditions the auto-gain will
increase the gain to a level that may make the
display appear too cluttered, making it difficult to
distinguish fish. In this situation the auto-gain can
be reduced to display a weak bottom image but
with improved fish images.