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4. VIDEO SOUNDER OPERATION
4-10
Press the [GAIN] key to show the gain window, and rotate the [ENTER] knob
to
set the gain. Current level is shown on the bar. Press the RETURN key to finish.
The setting range is 0-100.
GAIN 200kHz
27
▲
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 Range shifting
The basic range can be thought of as providing a “window” into the water column
and range shifting as moving the “window” to the desired depth. The basic range
may be shifted up or down as desired by pressing the SHIFT soft key followed
by adjusting [+ RANGE -] key. Press the RETURN soft key to finish.
Shift
Shift concept