Furuno 1823C manual Reducing Interference, Types of interference, Noise limiter window

4. VIDEO SOUNDER OPERATION

4.6Reducing Interference

Interference from other acoustic equipment operating nearby or other electronic equipment on your boat may show itself on the display as shown below.

Interference from	Electrical inteference
other sounder

Types of interference

To reduce interference, do the following:

1.Press the [MENU] key.

2.Press the SOUNDER MENU soft key.

3.Select NOISE LIMITER, then press the EDIT soft key to show the noise limiter window.

NOISE LIMITER

▲§

OFF

LOW

°MEDIUM HIGH

▼

Noise limiter window

4.Use the trackball to select the degree of suppression desired (LOW, MEDIUM, HIGH), or turn the noise limiter off.

5.Press the RETURN soft key followed by the [MENU] key to close the menu.

Turn the noise limiter circuit off when no interference exists, otherwise weak echoes may be missed.

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