Furuno 1734C manual Adjusting the gain, Shifting the range, Examples of proper and improper gain

4. VIDEO SOUNDER OPERATION

4.3.3Adjusting the gain

Normally, set the gain to the point where excessive noise does not appear on the screen. Use a higher gain setting for greater depths and a lower setting for shallow waters.

Gain too high Gain proper Gain too low

Examples of proper and improper gain

Press the GAIN key to show the gain window, and adjust the ENTER knob or Cursor pad. Current level is shown on the bar, and the setting range is 0-100(%). Press the RETURN soft key to finish.

GAIN - LF

▲57

HIGH

LOW

▼

Gain window

Note 1: On the dual-frequency display, the gain can be independently set for LF and HF. Use the FREQ LF/HF soft key to select the frequency for which to adjust gain.

Note 2: Gain cannot be adjusted in the automatic sounder mode. The message “SOUNDER GAIN CANNOT BE CHANGED IN AUTO MODE” is displayed when you attempt to do so.

4.3.4Shifting the range

The basic range may be shifted up or down as desired by pressing the SHIFT soft key followed by adjusting the ENTER knob. Press the RETURN soft key to finish.

Shift

Shift concept

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