TRACKFISH 6600 Installation and Operation Manual54
NAVMAN
other object shown. When in the Sonar Zoom
display, the depth line marks the centre of the
zoomed area.
It can be switched On or Off. If switched On, it
appears on all the sonar displays.
Colour bar
This shows the range of colours used for the
selected colour 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 colour palette. Each colour
within the palette represents a different echo
strength, as shown on the sonar displays.
There is a choice of fi ve colour palettes: Black,
Blue, White, Vivid and 8 colour. The
first four pallettes display more detail, and
each colour covers a 1.5 dB signal range. The
8 colour palette displays less detail, and each
colour covers a 3 dB signal range.
Interference filter
This fi lters 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.
