Furuno 1934C-BB, GD-1920C-BB Suppressing Second-trace Echoes, Setting watchman stand-by interval

2. RADAR OPERATION

Note: When the watchman is activated and no guard zone is active, the message “PLEASE SET GUARD ZONE. PUSH ANY KEY TO CONTINUE.” appears. Press any key and then set a guard zone.

2.23.3 Setting watchman stand-by interval

The watchman standby interval, that is, the number of minutes the radar is in standby, can be set to 5, 10 or 20 minutes as follows:

1.Press the MENU key.

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

3.Select WATCHMAN TIME, then press the A: EDIT soft key.

WATCHMAN TIME

5minutes

10minutes

20minutes

Watchman window

4.Select time desired, then press the C: ENTER soft key.

5.Press the MENU key to close the menu.

2.24 Suppressing 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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