Furuno 1832 Selecting Pulsewidth, Guard Alarm, Mentally create the guard zone you want to set

3.Select “6. IntReject”.

4.Select level desired by operating the omnipad.

5.Press the [ACQ/ENTER] key.

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

IR and level selected appears at the bottom right corner on the display when the interfer- ence rejection circuit is turned on.

3.6Selecting Pulsewidth

Pulsewidth is the transmission time of a single radar pulse. The longer the pulsewidth the greater the direction range capability, however range accuracy and range resolution are re- duced.

Pulsewidth can be selected to short or long on the 1.5 and 3 nautical mile ranges.

1.Press the [MENU] key.

2.Select “OTHER MENU” and press the [ACQ/ENTER] key.

3.Select “7. Pulselength”.

4.Select Short or Long by pressing the omnipad.

5.Press the [ACQ/ENTER] key to select.

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

3.7 Guard Alarm

The guard alarm allows the operator to set the desired range and bearing for a guard zone. When ships, islands, landmasses, etc. violate the guard zone an audible alarm sounds and the offending target brinks to call the operator’s attention.

Selection of guard zone type

The guard alarm can be set to sound when a target either enters or exits the guard zone. You can select which type of guard alarm you want through the menu.

In alarm

The alarm sounds on targets entering the guard zone. “G (IN)” appears at the top right-hand corner when the In alarm is selected.

Out alarm

The alarm sounds on targets exiting the guard zone. “G (OUT)” appears at the top right-hand corner when the Out alarm is selected.

	Dashed line:
	no alarm
	Guard
IN ALARM	zone
	OUT ALARM

Figure 3-7 In and Out alarm

Setting a guard zone

Preparation

1.Press the [MENU] key, and then select “OTHER MENU” and pressing the [ACQ/ ENTER] key.

2.Select “17. Guard Mode” and “In” (alarm on target entering zone) or “Out” (alarm on target exiting zone) by operating the omnipad.

3.Press the [ACQ/ENTER] key.

4.Press the [MENU] key to close the menu.

To set a guard zone

1.Mentally create the guard zone you want to set.

2.Operate the omnipad to set the cursor on point A or B. Press the [GUARD] key. “*G (IN)” or “*G (OUT)”, with asterisk blink- ing, appears at the top right-hand corner of the display. See Figure 3-8 (2). (The aster- isk indicates the guard zone is partially set.)

3.Operate the omnipad to set the cursor on point C or D. See Figure 3-8 (3).

4.Press the [GUARD] key. The asterisk dis- appears. See Figure 3-8 (4).

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