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4. ECHO SOUNDER MODE
4-10
4.11 Echo Sounder Menu Overview
This section presents an overview of the items on the ES menu.
1. Press the MENU key to open the menu.
2. Press ▲ to choose MENU and then press ◄ or ► or to choose the ES menu.
TVG LEVEL
4.0
4.0
TVG DISTANCE
RES. COLOR LOG
CLUTTER 0
: SELECT
: CHANGE
MENU: END
MENU
COM1 HORZ VERT ES PRESET SYSCOM2
A-SCOPE OFF
ES menu
3. Press ▲ or ▼ to choose item desired.
4. Press ► to show corresponding dialog box.
5. Press ◄ or ► to choose option desired.
6. Press the MENU key to register your selection and close the menu.
4.11.1 Echo sounder menu description
TVG LEVEL: Compensates for propagation loss of sound in water. See paragraph 4.10.1.
Default setting is 4.0.
TVG DISTANCE: As above. Default setting is 4.0.
RES. COLOR: Sets transfer characteristics of input signal level versus display echo level.
Echo strength is emphasized in order of CUBE, SQUARE, LINEAR, LOG. You can see the
characteristics of each by watching the color bar as you change the setting. The default
setting is LOG.
LOG: Displays weak to strong echoes in their respective levels. This setting is suitable for
general use.
LINEAR: Downplays the weak echoes when compared with LOG. Effective for suppressing
weak echoes such as plankton.
SQUARE: Strong echoes are emphasized more than in LINEAR.
CUBE: Strong echoes are emphasized even more than in SQUARE.
CLUTTER: Low intensity echoes, often caused by sediments in water, are painted on the
screen as a large number of random dots. The higher the number (setting) the weaker the
echoes which are erased.
A- SCOPE: Turns the A-scope display on/off. Default setting is OFF. See paragraph 4.10.2.