Onwa Marine Electronics KR-12X8 - Manual (Page 22)

In order to adapt to the different environments, the radar echo display the back-
ground color and echo color can be set by users themselves, there are five kinds
of background colors and three kinds of echo colors available. Setting methods are
2.11 Setup display color
as follows:
1.By menu
1) Press [FUNCTION] key open main menu;
2) Select ''OTHER MENU'' and press [ACQ/ENTER] key;
3) Press [
]or [ ] key select ''Color setting'' & press [ACQ/ENTER] key
open the color setup menu;
4) Press [ ] or [ ] key select ''Background Color'' or ''Echo Color'' press
[ACQ/ENTER] key;
5) Press [
] or [ ] select color desired and press [ACQ/ENTER] key;
6) Press [MENU] key to close the menu.
2 . Using the function key
The function keys [F1] function default setting for ''Background Color'' ,[F2]
key default setting for ''Echo Color''. Directly on the keyboard you can press
these two keys select the desired color setting.
The [GAIN] control adjusts the sensitivity of the receiver. It works in precisely
the same manner as the volume control of a broadcast receiver, amplifying the
signals received. The proper setting is such that the background noise is just
visible on the screen. If you set up for too little sensitivity, weak echoes may
be missed. On the other hand excessive sensitivity yields too much background
noise; strong targets may be missed because of the poor contrast between desired
echoes and the background noise on the display. To adjust receiver sensitivity,
transmit on long range, and adjust the [GAIN] control so background noise is
2.12 Adjusting Receiver Sensitivity
just visible on the screen.
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