Furuno 1623 - Manual (Page 20)

1. OPERATION
12
1.21 Watchman
Watchman transmits the radar for one minute
to check if a target has entered or exited the
guard zone from the previous transmission. If
no change is found, the radar goes into
standby for the number of minutes set for the
watchman feature. If change is found, the
audio alarm sounds, watchman is canceled
and the radar transmits. This feature is useful
for extending the life of the magnetron.
ST-BY
5,10
or
20 min
Tx
1 min
Tx
1 min
Watchman
starts
5,10
or
20 min
ST-BY
* *
* Beeps emitted just before radar transmits.
How watchman works
1. Press the [MENU/ESC] key to open the
User menu.
2. Press ▲ or ▼ to choose WATCHMAN
TIME from page 2.
3. Press ► to open the options window.
OFF
5 min
10 min
20 min
Watchman time options
4. Press ▲ or ▼ to choose appropriate time
out, that is, the amount of time the radar
waits in standby, among 5, 10 and 20
minutes.
5. Press the [MENU/ESC] key to close the
menu.
1.22 Suppressing Long-range
Rain Clutter
In adverse weather, clouds, rain or snow
produce spray-like spurious echoes which
impair target detection over a long distance.
These echoes can be suppressed by turning
on the FTC.
1. Press the [MENU/ESC] key.
2. Press ▲ or ▼ to choose FTC from page
1.
3. Press ► to open the options window.
4. Press ▲ or ▼ to choose OFF or ON as
appropriate.
5. Press the [MENU/ESC] key to close the
menu.
“FTC” appears at the top right corner when
the FTC is active.