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 mo- tor, 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 ap- pears 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 trans- ducer owner's manual for the best mounting position.

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Eagle Electronics 320 manual
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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.

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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.
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