Furuno FR-10, Operator'S Manual

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2. OPERATION
2-11
2.9 How to Select the Range Scale
The selected range scale, range ring interval and pulse length are shown at the top
left corner on the screen. When an objective target comes closer, reduce the range
scale so that the target appears in 50-90% of the display radius.
Press the RANGE button to select range. Press + to shrink the target, or - to enlarge
the target.
2.10 How to Adjust the Gain (sensitivity)
The gain control adjusts the sensitivity of the receiver for the best reception. The gain
can be adjusted automatically or manually.
1. Press the MENU key to open the menu.
2. Press  or  to select [Echo].
3. Press  or  to select [Gain Mode] and press ENTER .
4. Press

or

to select [Auto] or [Manual] and press ENTER .
The window for Gain/Sea/Rain indicator shown below appears. This window clos-
es automatically when there is no menu operation for three seconds. [Auto] i. The
window shown below appears. For [Manual] go to "Manual adjustment of gain" on
the next page.
5. Press the CANCEL/HL OFF
key to close the window.
6. Press the MENU key to close the menu.
Note: Rotate the GAIN knob while the [Gain Mode] is [Auto], The window shown
below appears. Select [Yes] with the cursorpad and the Enter key to switch to the
3
NM
12
NM
Short range Long range
Object size
changes
with range
AUTO: Automatic, MAN: Manual
Gain setting bar