NOISE

A major cause of sonar problems is electrical noise. This usually appears on the sonar's display as random patterns of dots or lines. In severe cases, it can completely cover the screen with black dots, or cause the unit to operate erratically, or not at all.

To eliminate or minimize the effects of electrical noise, first try to determine the cause. With the boat at rest in the water, the first thing you should do is turn all electrical equipment on the boat off. Make sure the engine is also off. Turn your sonar on, then turn off Noise Reject [also known as the ASP feature (Advanced Signal Processing)]. Sensitivity should be set at 90-95 percent. There should be a steady bottom signal on the display. Now turn on each piece of electrical equipment on the boat and view the effect on the sonar's display. For example, turn on the bilge pump and view the sonar display for noise. If no noise is present, turn the pump off, then turn on the VHF radio and transmit. Keep doing this until all electrical equipment has been turned on, their effect on the sonar display noted, then turned off.

If you find noise interference from an electrical instrument, trolling motor, pump, or radio, try to isolate the problem. You can usually reroute the sonar unit's power cable and transducer cable away from the wiring that is causing the interference. VHF radio antenna cables radiate noise when transmitting, so be certain to keep the sonar's wires away from it. You may need to route the sonar unit's power cable directly to the battery to isolate it from other wiring on the boat.

If no noise displays on the sonar unit from electrical equipment, then make certain everything except the sonar unit is turned off, then start the engine. Increase the RPM with the gearshift in neutral. If noise appears on the display, the problem could be one of three things; spark plugs, alternator, or tachometer wiring. Try using resistor spark plugs, alternator filters, or routing the sonar unit's power cable away from engine wiring. Again, routing the power cable directly to the battery helps eliminate noise problems. Make certain to use the in-line fuse supplied with the unit when wiring the power cable to the battery.

When no noise appears on the sonar unit after all of the above tests, then the noise source is probably cavitation. Many novices or persons with limited experience make hasty sonar installations which function perfectly in shallow water, or when the boat is at rest. In nearly all cases, the cause of the malfunction will be the location and/or angle of the transducer. The face of the transducer must be placed in a location that has a smooth flow of water at all boat speeds. Read your transducer owner's manual for the best mounting position.

89

Page 96 Page 98
Page 97
Image 97
Eagle Electronics 320, 320DF manual Noise
Page 96 Page 98

320, 320DF, 320 specifications

Eagle Electronics 320 is a state-of-the-art device that has transformed the landscape of consumer electronics. Designed for those who demand both performance and precision, this innovative product integrates several cutting-edge technologies to deliver a seamless user experience.

One of the standout features of the Eagle Electronics 320 is its advanced touchscreen display, which boasts vibrant colors and high resolution, making it ideal for multimedia applications. With a responsive interface, users can navigate through menus and applications effortlessly. The display also incorporates anti-glare technology, ensuring visibility even in bright environments.

In terms of connectivity, the Eagle Electronics 320 is equipped with multiple options, including Bluetooth 5.0, Wi-Fi 6 compatibility, and NFC capabilities, allowing users to connect with other devices quickly and efficiently. This extensive connectivity makes it perfect for both personal and professional use, enabling easy file sharing and seamless device pairing.

The Eagle Electronics 320 is powered by an impressive multi-core processor that provides fast and efficient performance. Whether running demanding applications or multitasking, this device excels in speed and responsiveness. Coupled with ample RAM, users can enjoy smooth operation without the frustrating lags often associated with lower-end devices.

Another key feature is its robust battery life. The Eagle Electronics 320 has been engineered to last, providing users with extended usage time without frequent recharging. This is especially beneficial for professionals on the go or anyone who relies on their device for long periods.

Regarding audio, the Eagle Electronics 320 doesn't disappoint. It features superior sound technology, including noise cancellation and enhanced bass, ensuring an immersive audio experience whether watching movies, listening to music, or engaging in video calls.

Security is a top priority with the Eagle Electronics 320. It comes with advanced encryption technologies and biometric authentication options, such as fingerprint scanning and facial recognition, ensuring that user data remains protected.

In summary, the Eagle Electronics 320 is a remarkable device that brings together modern design, powerful performance, and innovative features. Its impressive technologies make it suitable for a wide range of applications, appealing to both tech enthusiasts and everyday users alike. Whether for work or play, this cutting-edge electronics marvel stands out as a reliable companion in today’s fast-paced digital world.
Top Page Image Contents