Alarm Adjustment - Interphase Sonar Engine SE-200 Operation Manual

Pressing the CURSR button will toggle the screen cursor
and it's CURSOR DATA BOX on and off. The drawing at
right shows a forward horizontal scan display with the
CURSOR activated and the CURSOR DATA BOX in the
lower right corner of the display.
To use the screen Cursor feature, press the CURSR button
to activate and then use the NAV button to move the cursor
to the desired location on the display. Wherever the cursor
is placed, the CURSOR DATA BOX will display the
approximate RANGE, DEPTH and BEARING (if in the
horizontal scanning mode) from the vessel to that location.
It is important to realize that the depth and bearing
information in the CURSOR DATA BOX is the result of a
calculation based on the angle of the acoustic beam below
the surface of the water. Because each transducer
installation is unique and the vessel may be moving up and
down in the water - the angle of the acoustic beam is only
approximately known. Therefore, the calculated depth is
also only an approximation and should not be relied upon
during critical situations.
It is also important to understand that the calculated depth in
the CURSOR DATA BOX is the depth at the center of the
SE-200's 12-degree acoustic beam angle as shown in the
diagram at right. Notice that the beam expands as it gets
further from the boat. For example, at 1,000 feet the beam
angle has a diameter of greater than 100 feet! However, the
cursor calculates the depth at the centerline of the beam as
shown.

Alarm Adjustment

A forward looking alarm can be set in the downlooking,
vertical and horizontal scan modes. When the alarm is set, a
red "alarm" line and an alarm depth box appears on the
display to indicate the alarm setting and the fact that it is
active.
The actual audio alarm element is located inside the SE-200
Sonar Engine Box. If this unit is mounted far from the dis-
play, it may not be possible to hear the alarm unless an ex-
ternal alarm, such as the Interphase P/N 15-0005-008 Su-
per Beep Piezo Alarm, is connected as shown on the next
page or page 32.
In the vertical scan mode, the alarm will sound if a target
appears above the alarm line. In the horizontal scan mode,
the alarm will sound if a target is closer to the boat than the
alarm line. In additions to the alarm sounding, the alarm box
CURSOR DEPTH AND RANGE
Surface
Range
12-Degree
Beam Angle
PRESS ANY SOFTKEY TO BRING UP SOFTKEY MENU
EXIT BEAM COLOR
31.5 Ft
Targets On This Side of Line Will Cause
Alarm Setting
Alarm to Sound and Alarm Setting Box to
13.2 Ft 25
Depth
12.5
5 Ft
25
EXIT CLEAR
11
Depth
ALARM SET-UP
Alarm Line
Bearing: 26
Depth 7.9Ft
Range 45.0Ft
Blink
50
DOWN UP