Eliminating Weak Echoes; Suppressing Unwanted Noise - Furuno FCV-30 Operator's Manual

1. OPERATIONAL OVERVIEW
1.14

Eliminating Weak Echoes

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.
1. Click Settings.
2. Click Echo image.
3. Click ◄ or ► in the Signal level box to choose the echo strength you wish to erase. The
higher the number the stronger the echo that will be erased.
4. Click OK button.
1.15

Suppressing Unwanted Noise

Noise from other echo sounder or electrical interference may show itself on the screen. Use
the noise limiter to suppress unwanted noise.
1. Click Setting.
2. Click Echo image.
3. Click ▼ in the Noise limiter box.
Noise limiter options
4. Click the setting desired. The higher the number the greater the degree of suppression.
Choose OFF when no noise exists, so as not to miss small targets.
5. Click the OK button.
1-24
Interference from
other sounder
Examples of noise
Electrical interference