3
Operation
Keyboard
POWER
Turn the power supply on/off.
BACKLIGHT
Adjust the LCD backlight.
MENU
Press
【
MENU
】
to display the menu items. Then select a particular option.
Using the
【
▲
】
or
【
▼
】
, and use
【
】
or
【
】
to adjust the setting value.
Press
【
MENU
】
again to save the setting and quit from menu.
RANGE
【
RANGE
▲
】
&
【
RANGE
▼
】
Press the range key to adjust the range manually.
Range scope: 4 8 24 40 56 80 120 160 200 240 280m.
GAIN
【
GAIN
】
+
&
【
GAIN-
】
In single frequency model, press
【
GAIN+
】
or
【
GAIN-
】
to adjust the gain
value for the clearest echo.
In dual frequency model, press
【
GAIN+
】
or
【
GAIN-
】
to adjust the gain
value of dual frequencies simultaneously.
