How To Suppress Second-Trace Echoes - Furuno FCR-2107 Operator's Manual

2.24

How to Suppress 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. Use the trackball to select the MENU box at the right side of the screen then push the left button.
2. Spin the scrollwheel to select Echo then push the scrollwheel to open the Echo menu.
3. Spin the scrollwheel to select 2nd Echo Rej then push the scrollwheel.
Active functions are checked.
4. Spin the scrollwheel to check (activate) or uncheck (deactivate) 2nd Echo Rej as appropriate then push the
scrollwheel.
5. Echo menu will close automatically.
Tx repetition
Actual range
Second-trace echo
[Echo]
Go Back
2nd Echo Rej
PM
SART
Tune Initialize
15. Navigation Sensors
Second-trace
echo
False echo
range
2-33