Suppressing Second-Trace Echoes - Furuno FAR-28x7 Series Operator's Manual

1.37

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.
To reject second-trace echoes:
1. Roll the trackball to choose the MENU box at the right side of the screen and
then push the left button.
2. Roll the wheel to choose 1 ECHO and then push the wheel or the left button
to open the ECHO menu.
[ECHO]
1 BACK
ND
2 2
OFF/ON
3 TUNE INITIALIZE
4 PM*
OFF/ON
5 SART
OFF/ON
6 WIPER
OFF/1/2
7 ECHO AREA*
CIRCLE/WIDE/ALL
3. Roll the wheel to choose 2 2
left button.
4. Roll the wheel to choose OFF or ON as appropriate and then push the wheel
or the left button.
5. Push the right button twice to close the menu.
Tx repetition
Actual range
Second-trace echoes
ECHO REJ
1
2
*
*
ECHO menu
Second-trace
echo
False echo
range
1
Not available on FAR-2157/2167DS
2
Not available on IMO or A type
ND
ECHO REJ and then push the wheel or the
1. RADAR OPERATION
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