Furuno FCV-30 Operator's Manual page 86

3. CHANGING SETTINGS
STC: Help distinguish surface fish from surface echoes. The setting range is 0-10; the
higher the setting the greater the extent of suppression. Setting 10 suppresses noise up to
5 m. Turn off the STC when there is no noise on the screen, otherwise weak echoes may be
missed.
Range details: If the factory-set ranges are not to your liking, you may change them as
desired.
Zoom range: Set zoom ranges.
Zoom range details: f the factory-set zoom ranges are not to your liking, you may change
them as desired.
Clutter: Adjust to suppress on-screen clutter. The higher the figure, the stronger the amount
of clutter suppression. "0" turns off the clutter feature. Clutter is automatically adjusted when
the Auto mode (Fishing or Cruising) is active.
Picture advance: Choose the speed of picture advancement.
Noise limiter: Turn on to reject noise. The settings are OFF, NL1, NL2 and NL3, and NL3
provides the highest degree of noise suppression.
Echo smoothing: Adjust this item when echoes appear "spotty". The higher the setting the
greater the smoothing.
Signal level: Sedimented water or reflections from plankton may be painted on the display
in green or light-blue. These weak echoes may be erased with the signal level function.
Tx rate: Choose the interval between transmissions. The smaller the figure the longer the
time between transmissions and thus the longer an image remains on the screen.
Ping setting: Interference from another echo sounder or a scanning sonar may be
suppressed by synchronizing transmission with the offending echo sounder or scanning
sonar. Choose External to synchronize transmission. Select Internal when no echo sounder
or scanning sonar is connected, or to synchronize and transmit with the TX signal from this
equipment.
Auto mode: Turn the auto mode ON or OFF. When activated display range, gain and
clutter are automatically adjusted, for virtually hands-free operation.
Display range: Adjusted to display bottom echo on the screen.
Gain: Adjusted to display the bottom echo in reddish-brown color.
Clutter: Adjusted to suppress weak echoes (such as those from sedimented water).
Two auto modes are available: Cruising and Fishing. "Cruising" suppresses weak echoes to
show the bottom echo clearly. "Fishing" displays weak echoes clearly.
Target echo: The default setting is "Standard", which is useful for general fishing. If the
objective is whitebait, choose "Surface".
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