2.8Suppressing Interference

Interference from other acoustic equipment operating nearby or other electronic equip- ment on your boat may show itself on the display as shown in Figure 2-20.

To suppress interference, do the following:

1.Press the [MENU] key and the soft key

SOUNDER SETUP OPTIONS.

2.Select NOISE LIMITER and press the soft key EDIT to show the noise limiter win- dow.

NOISE LIMITER

▲

'OFF ™NL1 ™NL2

™NL3

▼

Figure 2-20 Noise limiter window

3.Press ▲ or ▼ to select degree of sup- pression desired; OFF, NL1, NL2 or NL3. The higher number the greater the degree of suppression.

4.Press the soft key RETURN and the [SNDR] key to finish.

2.9Suppressing Low Level Noise

Light-blue dots may appear over most of screen. This is mainly due to dirty water or noise. This noise can be suppressed by ad- justing CLUTTER on the SOUNDER SETUP OPTIONS menu.

When the sounder mode is Auto, the clutter suppression setting is fixed at AUTO. To sup- press low level noise in manual sounder op- eration do the following:

1.Press the [MENU] key and the soft key

SOUNDER SETUP OPTIONS.

2.Select CLUTTER and press the soft key EDIT to show the clutter window.

CLUTTER

▲

3

▼

Figure 2-22 Clutter window

3.Press ▲ or ▼ to select clutter rejection level desired; 0 (OFF) through 9. The higher the number the higher the degree of suppression. Note that weak echoes may not be displayed when the clutter cir- cuit is on.

4.Press the soft key RETURN and the [SNDR] key to finish.

Interference from

Electrical inteference

other sounder

 

Figure 2-21 Types of interference

Turn the noise limiter circuit off when no in-

terference exists, otherwise weak echoes Figure 2-23 Appearance of clutter may be missed.

2-7

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Furuno GP-1850F, GP-1850DF manual Suppressing Interference, Suppressing Low Level Noise, Sounder Setup Options
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GP-1850F, GP-1850DF specifications

Furuno is renowned for its high-quality marine electronics, and the GP-1850DF and GP-1850F are no exceptions. These advanced GPS chart plotters are designed to meet the needs of both professional mariners and recreational boaters alike.

The GP-1850DF is equipped with a powerful 12-channel GPS that provides fast and accurate positioning information, while the GP-1850F features a sturdy built-in fish finder, making it ideal for anglers. Both units boast a brilliant color display that enhances visibility in various lighting conditions, ensuring that users can easily read information on the screen, even in direct sunlight.

One of the standout features of these models is their compatibility with a variety of chart formats, including C-MAP, and Furuno’s proprietary raster charts. This flexibility allows users to choose from a broad range of navigational charts, catering to specific regional needs and preferences. The intuitive interface of the GP-1850 series simplifies navigation, offering menu-driven commands and support for multiple languages.

Furuno has integrated advanced sonar technology in the GP-1850F model, including a high-resolution fish finder capable of detecting fish signatures with remarkable precision. The dual-frequency capabilities enable users to switch between higher frequencies for shallow water fishing and lower frequencies for deeper waters. This enriches the fishing experience while improving catch rates.

Moreover, both devices feature a built-in waypoint register, allowing users to store up to 1,000 waypoints, which can be essential for returning to promising fishing spots or navigating back to port. The navigation functions also include routes and track recording, empowering boaters to create custom paths and review their previous journeys.

The GP-1850 series also places a high emphasis on safety, incorporating features like man overboard (MOB) alarms and route alarms to enhance on-water safety. Additionally, they are designed to withstand the harsh marine environment, with waterproof housings that ensure durability during adverse weather conditions.

In conclusion, the Furuno GP-1850DF and GP-1850F models provide an exceptional combination of performance, reliability, and user-friendly features, making them a preferred choice for both fishermen and navigators. Their adaptability in various maritime situations, alongside advanced technologies, cements their reputation as essential tools for successful and safe voyages on the water.
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