Furuno 1724C Description of sounder displays, Single-frequency display, Dual-frequency display

4. VIDEO SOUNDER OPERATION

4.1.2Description of sounder displays

Single-frequency display

			Display mode
	Variable Range Marker (white)
		Depth scale		Soft keys
	Minute marker	Time
Zero line		0'30"	0	SOUNDER
Icons	SIM			SINGLE
(alarm, battery,	50
simulation)
	F			SHIFT
		52	50

Color bar
			Fish		AUTO/
					D. BOX
		40	echo	Cross-hair
	Temp.			cursor
					FREQ
	scale	30		100	LF	/HF
	(orange)

Water	DISPLY
	MODE
temp.
	150
graph

Water
	114
temp.
			200
display		LF
		Tx frequency		Bottom echo

Depth

Indications on the single frequency display

Note: The water temperature display requires an appropriate water temperature sensor. It can be turned on or off with TEMPERATURE GRAPH on the SOUNDER MENU.

Selecting transmission frequency

The single frequency display shows either the LF (low frequency) picture or HF (high frequency) picture. To select transmission frequency, press the FREQ LF/HF soft key. “LF” or “HF” is highlighted on its key label with each press of the key.

Dual-frequency display

The dual-frequency display provides both LF and HF pictures. This display is useful for comparing the same picture with two different sounding frequencies.

LF picture

The sounder uses ultrasonic pulses to detect bottom conditions. The lower the frequency of the pulse, the wider the detection area. Therefore, the low

	0.0
LF	HF

Dual-frequency display

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