Interphase 180 - Scanning Speed; Alarm Adjustment; Beam Adjustment

24
Scanning Speed
The iScan 180 has two scanning speeds. Fast - indicated
with two right facing triangles (

), and slow, indicated
with one right facing triangle(

). In the faster mode, the
display resolution is reduced because the number of
scanning samples is reduced.
Alarm Adjustment
A forward looking alarm can be set in the downlooking, the
vertical and in the 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.
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. See diagrams at left.
To set the alarm, press any of the five unmarked softkeys
below the display to bring up the softkey menu. Then, press
the softkey beneath the ALARM symbol to bring up the
ALARM MENU.
To adjust the alarm setting, use the buttons below the 
symbols in the ALARM MENU, or the NAV or UP/
DOWN button. Press the softkey button below the EXIT
symbol to save the setting and exit, or press the button below
the CLEAR symbol to disable the ALARM and exit.
Beam Adjustment
The iScan 180 can scan a 90 degree vertical arc (segment) or
a 180 degree horizontal arc. In some cases you may want to
reduce the size of the sector and then steer it in a particular
direction. Reducing the sector size is one way to increase
the scanning speed, as time isn’t wasted by scanning
unwated areas. The BEAM can be adjusted in both the
vertical and horizontal scanning modes.
To adjust the beam, press any of the five unmarked softkeys
below the display to bring up the softkey menu and
thenpress the softkey beneath the BEAM symbol to bring up
the BEAM MENU.
CURSR
VERT
HORIZ
DOWN
DATA
RANGE
GAIN
PWR
FORWARD LOOKING SONAR

CURSR
VERT
HORIZ
DOWN DATA
RANGE
GAIN
PWR
FORWARD LOOKING SONAR

Alarm Line
Alarm Setting
Targets On This Side of Line
Will Cause Alarm to Sound
CURSR
VERT HORIZ
DOWN
DATA
RANGE
GAIN
PWR
FORWARD LOOKING SONAR

Depth 13.2 Ft
25 50
25
12.5
5 Ft
EXIT CLEAR DOWN UP
Use NAV Button UP/Down  to adjust
beam sector width
EXIT CLEAR
Bearing: 26
Depth 7.9Ft
Range 45.0Ft
31.5 Ft