Furuno 1734C 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		S			SINGLE
		M
		I
(alarm, battery,	F
simulation)					SHIFT
	50		52	50
Color bar		Fish			AUTO/
	40		Cross-hair		D. BOX
		echo
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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