Interphace ULTRASCAN PC90, Operation Manual

Page: 26 / 56

26
Displays
Ultrascan PC90 has four different scanning sonar
display windows. They are VERT, HORZ, DOWN,
and VSPLIT, as shown at right. View a display by
clicking on its tab at the bottom of the window.
Each display fills the current Ultrascan PC90
window. Change the size and/or aspect ratio of the
Ultrascan PC90 window by dragging the sides or
corners of the window.
Setting Color and Units
The color scheme and distance units can be changed
to suit your operating conditions and preferences.
Access Color and Units controls using the Setup
menu. Both parameters are consistent in Ultrascan
PC90 regardless of which scanning display window is
active. The units are also consistent in the depth
window but the color scheme of the depth window
cannot be changed.
Display windows can be viewed in one of three color
schemes:
• Normal, a color palette varying from light blue
through red on a black background which is
useful for operation in normal daytime
conditions.
• Sunny, a gray-scale palette on a white back-
ground which allows you to view contrast in
very bright conditions
• Night, black, dark red and bright red which
enable you to see contrast while preserving your
night vision.
Each display includes scale bars showing distance in
the selected Units. Units options include Feet, Meters
and Fathoms. The selected units are displayed in the
Status Bar for reference.
In the pop-up window shown at left, there is also an
adjustable slider labeled Noise Floor. When the
slider is at the bottom the Ultrascan will displays the
full dynamic range of echo signals Signal strength is
related to color with red being the strongest. Raising
the slider will eliminate the lower signal strength
colors (blue) which can help reduce clutter in shallow
water situations.