GPSMAP 392/398/492/498 Owner’s Manual
75
U
SING
S
ONAR
>
S
ONAR
P
AGE
Using the Sonar Adjustment Menu
The Sonar Adjustment menu gives you direct access to the settings
and features most commonly used on the Sonar Page. The option
selected currently appears in the upper-left corner of the screen.
Press
ADJ/MENU
to see a list of all
options and their current settings.
To select an adjustment option from the Sonar Page:
1. Press the
ROCKER
left or right to scroll through the options
in the upper-left corner of the screen.
2. Press
ENTER
to access the option’s adjustment window.
OR
1. Press
ADJ/MENU
. A list of all options and their current
settings appears, with the selected option highlighted.
2. Press up or down on the
ROCKER
to select the option, and
press
ENTER
to access the adjustment window.
3. To exit any of the adjustment options, press
QUIT
.
To change a Sonar Adjustment menu setting:
1. Select an adjustment option to change using one of the
two methods described previously. The adjustment window
automatically times out and disappears when the unit is idle
for 20 seconds.
2. Press the
ROCKER
up or down to place the map pointer
or setting bar at the setting, range, or percentage
(Off, 1-100%).
3. Press
ENTER
or
QUIT
to exit the adjustment window,
or press left or right on the
ROCKER
to view another
adjustment window.
Range
—sets the screen depth range used for viewing. The unit can
be set to automatically track the bottom or set to a user-specified
depth range. Auto mode shows the most information possible while
continuously showing the bottom.
Gain
—controls the sensitivity of the sonar receiver.
Auto
(default)
is the recommended setting. It automatically sets the sonar
sensitivity. You can also set the gain manually. To see more detail
on the screen, increase the receiver sensitivity by selecting a higher
gain. If there is too much detail or if the screen is cluttered, lower
the sensitivity (lower the gain) to increase the clarity of the screen.
Содержание GPSMAP 392, 398, 492, 498
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