Furuno 1823C-BB, FURUNO MARINE RADAR manual Suppressing Second-trace Echoes, Second-trace echoes

2. RADAR OPERATION

2.24Suppressing Second-trace Echoes

In certain situations, echoes from very distance targets may appear as false echoes (second-trace echoes) on the screen. This occurs when the return echo is received one transmission cycle later, or after a next radar pulse has been transmitted.

Tx repetition

Second-trace echo

False echo range

Actual range

Second-trace echoes

To activate or deactivate the second-trace echo rejector do the following:

1.Press the [MENU] key.

2.Press the A:RADAR DISPLAY SETUP soft key.

3.Use the trackball to select 2ND ECHO REJECTION, then press the A:EDIT soft key.

4.Choose ON or OFF as appropriate, then press the C:ENTER soft key.

5.Press the [MENU] key to close the menu.

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