Furuno 1834C-BB Manual Do Utilizador

7. CUSTOMIZING YOUR UNIT 

Fish Alarm 

Level 
 
 

Sets the fish alarm sensitivity; that is, 

the minimum echo strength which will 

trigger the fish alarms. 

High: Orange and stronger echoes 

trigger the alarm.* 
Medium: Yellow and stronger echoes 

trigger the alarm.* 
Low: Green and stronger echoes 

trigger the alarm.* 

 

* = 8-color display 

Transmission  Turns TX power on/off.   

On, Off 

TVG  

(HF,LF) 

TVG (Time Varied Gain) compensates 

for propagation attenuation of the 

ultrasonic waves. It does this by 

equalizing echo presentation so that 

fish schools of the same size appear in 

the same density in both shallow and 

deep waters. In addition, it reduces 

surface noise. Note that if the TVG 

level is set too high short range 

echoes may not be displayed. 

0-9 

 

Echo Offset   

(HF, LF) 

If the on-screen echo level appears to 

be too weak or too strong and the 

level cannot be adjusted satisfactorily 

with the gain control, adjust echo 

offset to compensate for too weak or 

too strong echoes.   

-50 - +50 

Bottom Level 

(HF, LF) 

If the depth indication is unstable in 

automatic operation or the bottom 

echo cannot be displayed in 

reddish-brown by adjusting the gain 

control in manual operation, you may 

adjust the bottom echo level detection 

circuit, for both HF and LF, to stabilize 

the indication. Note that if the level is 

set too low weak echoes may be 

missed and if set too high the depth 

indication will not be displayed. 

-100 - +100 

KP Pulse 

Selects source of keying pulse. 

Internal, External (See installation 

manual.) 

Smoothing 

Smoothes echoes to present stable 

display. The higher the setting the 

greater the smoothing. 

SM1-SM4, OFF 

TLL Output 

Outputs current position to plotter 

where it is marked with TLL mark. Use 

soft key to output TLL. 

ON, OFF