4. ADVANCED SETTINGS
4-18
4.7.5
Calibration menu
You can calibrate (offset) the water temperature and other information from this menu.
Menu item
Description
[Temperature]
If the water temperature indication is wrong, you can correct it here.
For example, if the actual temperature is 2°C higher than the tempera-
ture displayed on screen, set the offset to [+2°C].
[Bottom Lock Mode]
Set how the bottom edge is determined, by signal level or display col-
or.
• [Level]:Determine the bottom edge by signal level. When the meth-
od is [Color], bottom fish may be hidden in the bottom edge. With
[Level] the shape of the bottom echo may change depending on the
bottom contour of the bottom.
• [Color]: Determine the bottom edge by display color. When bottom
fish are well separated from the bottom, the bottom is displayed with
a straight line, making discrimination of bottom fish easier. Howev-
er, the bottom presentation may change depending on gain setting.
[Bottom Level]
In the default bottom level setting [0], the equipment judges consecu-
tive strong echoes to be bottom echoes. If, in that setting, the depth
indication is unstable, adjust the bottom level. If vertical lines extend
upward from the bottom echo in the bottom lock display, lower the bot-
tom level to erase the vertical lines. If the level is too low, however, it
may be difficult to distinguish bottom fish from the bottom echo.
[Bottom Color]
When [Bottom Lock Mode] is set to [Color], you can select the color (0-
63) to be judged as the bottom echo.
[Zero Line Fill]
Turn off to see fish echoes near the surface.
[Draft]
The default depth display shows the distance from the transducer. If
you would rather show the distance from the sea surface, set your
ship's draft. The draft line for HF and LF can be set respectively.
[Gain ADJ]
If the gain is too high or too low, or the gain for the low and high fre-
quencies appears unbalanced, you can compensate it here.
FCV-38[ver 0252473-xx.xx]
