NorthStar Explorer 660 Installation And Operation Manual page 52

Color bar
This shows the range of colors used for the
selected color palette.
It can be switched On or Off. If switched On, it is
displayed down the left hand side of all the sonar
displays.
Zoom bar
This shows the vertical range that is enlarged in
the Zoom section.
It can be switched On or Off. If switched On, it
appears as a vertical scroll bar displayed on the
right hand side of all the sonar displays.
Palette
Use this to select a color palette. Each color
within the palette represents a different echo
strength, as shown on the sonar displays.
There is a choice of five color palettes: Black, Blue,
White, Vivid and 8 color. The first four
pallettes display more detail, and each color
covers a 1.5 dB signal range. The 8 color
palette displays less detail, and each color covers
a 3 dB signal range.
52 Northstar Explorer 660 Installation and Operation Manual
Interference filter
This filters the echo signal to reduce high-level,
spiky interference, such as engine noise.
It can be switched On or Off.
Pulse length
This can be used to specify the length of the
transmitted ultrasonic pulse. A short pulse length
improves the display detail but contains less
energy, therefore it does not penetrate as deeply
into the water as a longer pulse.
There is a choice of Auto, Short, Medium or
Long. The Auto setting is recommended.
Pulse power
This can be used to specify the power output
of the transmitted ultrasonic pulse. Low power
output conserves the battery and produces a
clear display in shallow water.
There is a choice of Auto, Low, Medium or
High. The Auto setting is recommended.