2.12 Adjusting The Picture; Suppressing Bottom And Surface Reflections - Furuno CH-300 Operator's Manual

2.12 Adjusting the Picture

2.12.1

Suppressing bottom and surface reflections

In shallow fishing grounds, excessive sea surface and bottom reflections often interfere with
wanted fish echoes and they cannot be eliminated sufficiently with the TVG controls. In
such cases, try to reduce the output power, without turning down the gain. The picture
becomes clearer when output power is reduces rather than when the gain is decreased.
1. Press the MENU key to open the menu.
2. Press ▲ to choose MENU and then press ◄ to choose the COM1 menu.
MENU
TX POWER
PULSELENGTH
TX RATE
INT REJECT
AGC
AUDIO LEVEL
: SELECT
3. Press ▲ to choose TX POWER and then press ►. The following dialog box appears.
TX POWER
MAX MIN
4. Press ► to choose MIN. (For long-range detection be sure to return the setting to MAX.)
5. Press the MENU key to register your selection and close the menu.
Maximum TX power
Sonar image and TX power setting
COM1 COM2 HORZ VERT
MAX
LONG
10
OFF
OFF
0
: CHANGE
COM1 menu
Minimum TX power
ES PRESET
MENU: END
2. HORIZONTAL MODE
SYS
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