Furuno 1715 Watchman, Suppressing Heavy Rain Clutter, Panel Backlighting, How watchman works

1.21 Watchman

How watchman works

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 stand-by 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.

	Tx	ST-BY *	Tx	ST-BY *
	1 min	5,10	1 min	5,10
		or		or
		20 min		20 min
Watchman
		* Beeps emitted just before radar transmits.
starts

How watchman works

Setting watchman stand-by interval

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

1.Set a 360° guard zone referring to paragraph 1.20.

2.Press the [MENU/ESC] key to open the User menu.

3.Press ▲ or ▼ to choose WATCHMAN TIME from page 2.

4.Press ► to open the options window.

OFF

5min

10min

20min

Watchman time options

5.Press ▲ or ▼ to choose appropriate time out, that is, the amount of time the radar waits in standby, among 5, 10 and 20 minutes.

6.Press the [MENU/ESC] key to close the menu.

Note 1: To turn off the watchman feature, choose OFF at step 5.

Note 2: You cannot put the radar in stand-by when the radar is transmitting for the watchman feature.

1. OPERATION

1.22Suppressing Heavy Rain Clutter

In adverse weather, clouds, rain or snow produce spray-like spurious echoes which impair target detection over all ranges. These echoes can be suppressed by turning on the FTC (Fast Time Constant). FTC works by splitting up these unwanted echoes into a speckled pattern, making recognition of solid targets easier.

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.

1.23 Panel Backlighting

You may adjust panel backlighting as follows:

1.Press the [MENU/ESC] key to open the User menu.

2.Press ▼ to choose SYSTEM MENU.

3.Press ▲ or ▼ to choose PANEL DIMMER from page 1.

4.Press ► to open the options window.

5.Choose OFF, LOW, MEDIUM or HIGH as appropriate.

6.Press the [MENU/ESC] key twice to close the menu.

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