Installation and Operation Manual
31
3-5-8 Split zoom and Full Screen zoom
Split zoom
Split zoom
mode expands selected area of
the single frequency by VRM(Variable Range
Mark). The left side displays zoomed section
of current sonar record. The VRM of right
side indicates the zoom section area.
•
Press
or
to change the zoom
range.
•
Press
or
to change the depth
range.
Bottom lock
If
Bottom lock
is on, the zoom depth (the
depth of the zoom section) is adjusted
automatically so that the bottom is always
displayed in the zoom section.
•
To turn Bottom lock on or off press
Full Screen zoom
Full screen zoom
displays only the zoom
section of split zoom.
[Split zoom] [Bottom Lock] [Full screen zoom]
*NF430 is a 200KHZ only.
3-5-9 Split bottom
Split bottom
display provides a normal
picture on the right half and a selectable
range over and below the bottom line is
expanded onto the left half of the screen.
This mode is useful for detecting bottom
fishes.
•
Use the
or
keys to adjust the
zoom range.
•
Press
or
to change the range
•
The VRM moves up and down to calculate
the bottom depth automatically.
Installation and Operation Manual
32
3-5-10 Split 50/200
The 50 kHz display appears on the left and
the 200 kHz appears on the right. This dual
frequency display is very useful for
comparing the same scanning with two
different frequencies.
*NF430 is a 200KHZ only.
3-5-11 Split A-Scope
This display shows echoes at each
transmission with amplitudes and colors
proportional to their intensities; on the right
of the screen it is useful for estimating the
kind of fish schools and bottom nature.
Echo strength color code varies from weakest
(blue) to strongest (red).
Echoes from fish and the bottom
Unwanted noise echoes.
The strongest echo, usually from the
bottom.
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