Furuno NAVNET 1833 - Manual (Page 156)

4. VIDEO SOUNDER OPERATION
4-10
Press the [GAIN] key to show the gain window, and adjust the [ENTER] knob or
trackball. Current level is shown on the bar. Press the RETURN key to finish.
The setting range is 0-100(%).
GAIN 200kHz
57 ▲
HIGH
LOW
▼
Gain window
Note 1: On the dual-frequency display, the gain can be independently set for 50
kHz and 200 kHz. Use the FREQ 50/200 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.
4.4.4 Shifting 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 or the trackball. Press the
RETURN soft key to finish.
Shift
Shift concept