Adjusting Gain - Furuno GP-3500F-D Operator's Manual

11.4.4

Adjusting gain

Adjust the sensitivity of the receiver so excessive noise just disappears from the
screen.
Gain too high
1. Press the [GAIN] key to show the GAIN window. For dual-frequency display,
press the key again if necessary to select the frequency.
2. Rotate the [ENTER] knob to set gain. (0.0 to 10.0).
Note: This setting must be done within 10 seconds after pressing the [GAIN]
Gain proper Gain too low
Example of proper and improper gain levels
GAIN 200kHz
HIGH
LOW
TURN KNOB TO
ADJUST GAIN.
Gain window (ex. 200 kHz)
key, otherwise the window will be erased.
11. VIDEO SOUNDER OPERATION
Use the proper gain setting.
Incorrect gain may produce wrong depth
indication, possibly resulting in a
dangerous situation.
6.0
Current setting
CAUTION
11-15