Setup > Sonar - Navman TRACKFISH 6500 Installation And Operation Manual

17-3 Setup > Sonar
once or more until the Setup
Press
menu is displayed, then select Sonar:
Frequency
There is a choice of: 200 kHz, 50 kHz and
Mixed. For information about selecting a
suitable frequency for the water conditions,
see section 8-3.
Scroll speed
Use this to set the scroll speed on the display.
There is a choice of: Very Fast, Fast,
Medium, Slow and Pause. The depth of the
water also affects the speed of the display.
Faster scroll speeds combined with a slow
boat speed (typically between 2 and 6 knots)
shows the most fish detail. Medium or Slow
scroll speeds result in sonar information being
displayed over a longer period, but with less
detail (see Section 8-2).
Fish symbols
The TRACKFISH always displays echoes from
fish (fish arches, see section 8-4). If fish symbols
are on, a symbol is displayed over the arch (see
section 8-4). The options are:
Off: No fish symbol is displayed.
•
• Fun or Normal: A fish symbol is
displayed.
• Fun + depth or Normal + depth: A
fish symbol is displayed and the depth shown
beside the fish symbol.
Fish filter
Use this to select the minimum fish size that
will be displayed as a fish symbol and to trigger
the Fish alarm. The options are: Small,
Medium and Large.
TRACKFISH 6500 Installation and Operation Manual
Fish sensitivity
Selects the minimum strength fish echo that
will be displayed as a fish symbol. Higher
values will display more fish symbols.
Digit size
Use this to remove or change the size of the
depth display on the sonar displays. There is a
choice of: Small, Medium and Large.
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 five 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
No filter, normal setting.
Filters the echo signal to remove spiky
interference such as engine noise or depth
sounders on nearby boats.
Noise filter
Averages the echo signal to remove rapid
changes. Select Meduim or High to give a
smoother bottom trace–this may help to detect
a deeper bottom; however these settings may
also remove fish echoes. Select Off for best
fishfinding.
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.
NAVMAN
61