Furuno CSH-53 manual Main, Setting, Description, Normal, Range

Main		Item		Setting	Description	Normal
Item	Main		Sub	Range		Setting
			SONAR	1–2	Choose "1" for single sonar, or	1
					"2" for dual sonar.
			F-SHIFT	1–2	Shifts Tx frequency. Choose "1"	1
	SONAR				for normal use.
					Selects presentation mode
			UP/TM		among North-up (Nup), Heading	Hup
SONR•BEAM					up (Hup), True Motion (TM).
					Sets horizontal beamwidth of Rx
			HOR*	0–10	beam. The higher the number,	0
	BEAM				the narrower the beam.
			NAR-		Suppresses sea surface
				1–10	reflections by reducing vertical	2
			ROW
					Rx beamwidth.
			ON/OFF	ON,OFF	Turns on/off scanning tilt angle	OFF
	AUTO				in 2° steps.
	TILT		WIDTH		Chooses automatic tilt width.	2° –12°
					2° –12°is the normal setting.
AUTO
			ON/OFF	ON, OFF	Turns on/off scanning EBL,	OFF
					which scans audio sector.
	AUTO
					Chooses automatic scanning
	SCAN
			WIDTH		width among ± 10° , ± 20° , ± 40°	± 10°
					and ± 60° .
			ON/OFF	ON, OFF	Turns fish alarm on/off.	OFF
					Sets echo level at which fish
					alarm sounds. Numbers 0–15	10
	FISH		LEVEL	0–15	correspond to 16 presentation
	ALARM				colors: 0, deep blue, 15, reddish
					brown.
			ZONE	Press +	Sets alarm zone, using the
ALM•AUDIO				key.	trackball and + key.
			SECTOR		Chooses audio sector among	30°
					30° , 60° , 90° , 180° and 330° .
					Chooses length of reverberation
	AUDIO		REVERB	0–9	for audio. Larger number gives	0
					longer reverberation.
			CENTER		Sets direction of audio sector,
					using the trackball and + key.

*HOR and 2AGC functions cannot be used together. If one is used the other is automatically set to “0”.

1-7