Echofish 820 – Installation & Operation manual
4
UNDERSTANDING SONAR
If you are familiar with the manipulation of a sonar, please
skip to the next section. However, if you have never owned
any sonar fishfinder yet, this section will teach you the basic
theory about sonar.
Based on the sonar technology, the Echofish 820 fish-
finder can detect the underwater conditions, including
fish presence or bottom structure. The transducer sends a
sound wave signal into the water in a cone shape. At the
source, the wave is narrow; however as it penetrates
deeper, the sound wave spreads forming a cone (i.e
flashlight). The sound wave bounces back to the transduc-
er when it strikes any object. The object can be a fish, the
structure, the bottom or any other object with a different
density from the water.
The transducer amplifies the return signal and sends it
back to the fishfinder. By measuring the time between the
sound wave transmission and its bounce, the fishfinder can
calculate the distance thanks to the inner microproces-
sor. T h e fishfinder displays the information on the screen
for your interpretation.
Summary of Contents for ECHOFISH 820
Page 95: ...Distribu par 3 67 02 RULHQW UDQFH 7HO FRQWDFW SODVWLPR FRP ZZZ SODVWLPR FRP...
Page 149: ...Vertrieben von 3 67 02 RULHQW 5 1 5 7HO FRQWDFW SODVWLPR FRP ZZZ SODVWLPR FRP...
Page 292: ...Distribu do por 3 67 02 RULHQW UDQoD 7HO FRQWDFW SODVWLPR FRP ZZZ SODVWLPR FRP...
Page 339: ...ECHOFISH 820 CD...
Page 342: ...Echofish 820 4 Echofish 820...
Page 343: ...Echofish 820 5 0 06 ms 2...
Page 344: ...Echofish 820 6 Echofish 820 200 50 kHz 12 35...
Page 345: ...Echofish 820 7 A B C D E F G H I 4x15mm J 3x20mm 1 1 1 1 2...
Page 346: ...Echofish 820 8 0 5mm 5 32 1 25 1 1 3 Allen...
Page 347: ...Echofish 820 9 1 4 4 x 15mm 4 x 15mm Allen 12 1 5 1 5 1 4 1 8...
Page 348: ...Echofish 820 10 3 8 10 1 6...
Page 349: ...Echofish 820 11 1 7 5 32 1 25 Allen...
Page 350: ...Echofish 820 12 2 2 1 balsa...
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Page 352: ...Echofish 820 14 2 3 100 20 24...
Page 353: ...Echofish 820 15 1...
Page 354: ...Echofish 820 16 2 3 1 5 m 24 36 volt Echofish 820 12 volt...
Page 355: ...Echofish 820 17 3Amp...
Page 356: ...Echofish 820 18 1...
Page 357: ...Echofish 820 19 2...
Page 358: ...Echofish 820 20 3 Menu Ent Ent Zoom zoom Backlight BACKLIGHT...
Page 359: ...Echofish 820 21 POWER CLEAR POWER CLEAR Exit exit Exit HOLD Exit GPS...
Page 361: ...Echofish 820 23 9 auto 3 5 1 Menu 2 Sonar 3 Sonar 4 Noise Filter 5 6...
Page 364: ...Echofish 820 26 1 Menu 2 Sonar 3 Sonar 4 Fish ID Sens 5 6 7 ENT 8 EXIT 6 Water type...
Page 372: ...Echofish 820 34 1 Menu 2 System 3 System 4 Beeper 5 6 7 ENT 15 Simulator...
Page 378: ...Echofish 820 40 23 Battery 1 Menu 2 Alarm 3 Alarm 4 Battery 5 6 7 ENT 8 EXIT 2 1...
Page 379: ...Echofish 820 41 1 2 10v 3 1 2 3 4 5 6...
Page 380: ...Echofish 820 42 7 1 2 1 2 3 1 2 3...
Page 381: ...Echofish 820 43 8...
Page 383: ...PLASTIMO Lorient France Tel 33 0 297 87 36 36 contact plastimo com www plastimo com...