Standard Horizon Ff520 User Manual download pdf (Page 17)

FF520 Page 19

3.0.83.0.8

3.0.8

Fish Finder BasicsFish Finder Basics

Fish Finder Basics

The FF520 consists of a high power transmitter, sensitive receiver and a transducer. The

FF520 sends an electrical pulse to the transducer, which contains an element that converts

the pulse into acoustic (sound) wave, which is sent through the water. As this wave travels

from the transducer to the bottom, it may strike fish, structures, thermalclines (temperature

changes in the water). When the wave strikes an object(s) a certain amount of the wave is

reflected back to the transducer depending on the composition and shape of the object.

When the reflected wave is returned to the transducer it is converted into a voltage and is

amplified by the receiver, processed and sent to the display. The speed of sound in water

is roughly 4800 Ft/sec, so the time lapse between the transmitted signal and the received

echo can be measured and the distance to the object determined.

Figure 3.0.8 - Fish Finder working principle

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Standard Horizon Ff520 User Manual Page 17