Furuno 1834C-BB 用户手册

4. VIDEO SOUNDER OPERATION 

The bottom-lock fish alarm sounds when a fish echo is within a predetermined distance 
from the bottom. Note that the sensitivity of the fish alarm can be set on the SOUNDER 
SYSTEM SETUP menu. 
 
1. Press the ALARM key to show the ALARM menu. 
2. Use the Trackball to select FISH ALARM (B/L). 
3.  Press the A: EDIT soft key to show the fish alarm (B/L) window. 

FISH ALARM (B/L) 

▲

ON

  0000.0-0000.0 ft   

OFF

▼

4. Use the Trackball to select ON or OFF as appropriate. For ON, use the Trackball and 

numeric keys to enter range: Adjust the Trackball to select digit; hit appropriate numeric 
key to enter value. 

5.  Press the C: ENTER soft key or push the ENTER knob to register setting. 
6. Press the ALARM key to close the menu. 
 

There are two types of water temperature alarms: WITHIN RANGE and OUT OF RANGE. 
The WITHIN RANGE alarm sounds when the water temperature is within the range set, and 
the OUT OF RANGE alarm sounds when the water temperature is higher or lower than the 
range set. Note that the water temperature alarm is turned on or off reciprocally with the 
water temperature alarm on the plotter menu. 
 
1. Press the ALARM key to show the ALARM menu. 
2. Use the Trackball to select TEMPERATURE ALARM. 
3.  Press the A: EDIT soft key to show the temperature alarm window. 

TEMPERATURE ALARM

▲

WITHIN RANGE

   +000.0 - +000.0

°

F

OUT OF RANGE

   +000.0 - +000.0

°

F

OFF

▼

4. Use the Trackball to select WITHIN RANGE, OUT OF RANGE or OFF as numeric key 

to enter alarm range: Adjust the Trackball to select digit; hit appropriate numeric key to 
enter value. To switch between plus and minus and vice versa use the A: +< - ->- soft 
key. 

5.  Press the C: ENTER soft key or push the ENTER knob to register setting. 
6. Press the ALARM key to close the menu.