Furuno 1823C manual Changing Pulse Repetition Rate

4. VIDEO SOUNDER OPERATION

4.14Changing Pulse Repetition Rate

Pulse repetition rate can be changed. Normally, the highest rate (20) is used. When in shallow waters, second reflection echoes may appear between surface and actual bottom echo. In this case lower the PRR level. The option “SPD SENSING PRR” means the ship’s speed dependent mode, where the PRR changes automatically with ship’s speed (required speed input.) For further information about the ship’s speed dependent mode, see page 4-18.

1.Press the [MENU] key to open the menu.

2.Press the SOUNDER MENU soft key.

3.Select PRR LEVEL.

4.Press the EDIT soft key to open the setting window.

5.Use the trackball to select the rate for repetition.

6.Press the ENTER soft key followed by the [MENU] key to close the menu.

Too small setting reduces the number of pulse repetition. This may cause a problem to search fish schools. Select “20” unless multistage reflections appear on the display.

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