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1. OPERATION
17
Bottom Area setting window
2. Use W or X to choose the border desired
(Above or Below).
3. Use
S or T to move upper or lower border
and press the ENTER key.
White Line: Displays the leading edge of the
bottom echo in white. This is useful for discrimi-
nating bottom fish from bottom. The setting
range is 0 to 50 % in intervals of five. The larger
the numeric, the wider the white line width.
White Marker: Displays the chosen echo color
in white.
1. Choose White Marker in the Sounder menu
and press the ENTER key.
White Marker setting window
2. Use S or T to choose color desired and
press the ENTER key.
For example, move the arrow to the top of
the color bar to display the bottom in white.
The echo color chosen on the color bar is
changed to white. That color is also white on
the color bar.
To turn off the white marker, choose Off at step
2.
TVG: The fish schools of the same size are dis-
played in different color between in deep water
and in shallow water because of the feature of
the ultrasonic waves. TVG compensates for
propagation attenuation of the ultrasonic waves.
It does this by equalizing echo presentation so
that fish schools of the same size appear in the
same density in both shallow and deep waters.
The gain is adjusted automatically depending
on the depth. The gain is low at short distance
and getting back with increasing distance. High
provides the greatest degree of gain reduction
against short range echoes. Note that this func-
tion is operative when manual is selected on the
GAIN knob.
Smoothing: Smoothes echo presentation
when enabled. Adjust the setting when echoes
appear “spotty”.
TX Power: Interference may appear on the
screen when an echo sounder having the same
frequency as your own is being operated in the
vicinity of your vessel. In this case, lower your
TX power and contact the vessel to request
them to reduce their TX power. The higher the
numeric the greater the TX power. The "Auto"
setting automatically adjusts TX power with
depth. Note that this function is only operative
when Fish Info and Fish Symbols in the Display
menu are off. When Fish Info and Fish Symbols
are on, the TX power mode is “Auto”.
TX Rate: Changes pulse repetition rate. Nor-
mally, the highest rate (10) is used. When in
shallow waters second reflection echoes may
appear between surface and actual bottom
echo. In this case, lower the TX rate level.
The choice "S" means the ship's speed depen-
dent mode, where the TX rate changes auto-
matically with ship's speed. (Requires ship's
speed input.)
W Above Below X
Border (above)
Bottom area
Border (below)
Bottom Area
[ENTER] : Set
[MENU] : Cancel
White Marker
S
/
T
: Select
[ENTER] : Set
[MENU] : Cancel
Off
Color bar
Choose echo colo
r
to display in white
.