Furuno CSH-5L/CSH-8L manual Sonar menu description, 1-16, Description of sonar menu

1.OPERATIONAL OVERVIEW

4.Use the [RANGE] control to choose a menu item. The selected item is highlighted.

Note: Items displayed in red are locked to prevent accidental change of setting. When any of those items are selected the display shown below appears, to ask you if you are sure to change the setting. To change the setting, use the [GAIN] control to choose YES and then press the [EVENT] key. The items colored in red turn green to show that they are available for adjustment.

SELECTED MENU IS LOCKED

ARE YOU SURE TO CHANGE? NO YES

PRESS [EVENT] KEY TO EXECUTE

5.Use the [GAIN] control to choose the option desired.

6.To close the menu, press the [MENU] key.

1.6.2Sonar menu description

Description of sonar menu

Item	Description	Ref. page
DISPLAY MODE	Chooses the display mode among, COMBI-1	1-6
	(NORM + Audio), NORM (Sonar) and
	COMBI-2 (NORM + Echosounder).
TX OUTPUT	Adjusts transmitter power.	2-4
PULSE LENGTH	Chooses pulse length.	2-3
TX CYCLE	Removes interference caused by other sonars	2-6
	operating nearby.
TVG NEAR	Adjusts receiving gain within 300 m.	2-1
TVG FAR	Adjusts receiver gain beyond 300 m.	2-1
AGC	Automatically reduces the receiver gain only	2-2
	against strong echoes such as the bottom or a
	large fish school, to suppress bottom tail.
2ND AGC	Suppresses bottom echo.	2-3
NOISE LIMITER	Suppresses unwanted reflections caused by	2-5
	sediments in water, plankton or ship’s noise.
COLOR CURVE	Adjusts echo presentation color curve against	—
	strong reflections. In setting “1,” for example,
	weak to strong signals are averaged and
	displayed to obtain a balanced picture. The larger
	the setting the better the resolution on weak
	signals.

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