Filter
Top Products
4. VIDEO SOUNDER OPERATION
4-6
4.1.3 Selecting screen split method in combination displays
On combination sounder displays you can split the screen vertically or horizontally, using
the SPLIT soft key as below.
0.0
LF
HF
0.0
LF
HF
SPLIT
/
SPLIT
/
How to use the SPLIT soft key (example: dual frequency display)
4.2 Automatic Sounder Operation
Automatic sounder operation is useful when you are preoccupied with other tasks and do
not have the time to adjust the display.
4.2.1 How the automatic sounder works
The automatic sounder function automatically selects the proper gain, range scale and
clutter suppression level according to the depth. It works as follows:
• The range changes automatically to locate the bottom on the lower half of the screen.
The range jumps to one step shallower range when the bottom echoes reach a half way
point of the full scale from the top and to one step deeper range when they come to the
lower edge of the scale.
• The gain is automatically adjusted to display the bottom echo in reddish brown (default
color arrangement).
• Clutter, which suppresses low level noise, is automatically adjusted.
4.2.2 Types of automatic sounder modes
Two types of automatic sounder modes are available: CRUISING and FISHING. CRUISING
is for tracking the bottom, and FISHING is for searching fish schools. CRUISING uses a
higher clutter rejection setting than FISHING therefore it is not recommended for fish
detection - weak fish echoes may be erased by the clutter suppression circuit.