Furuno SC-120 User Manual

3. OPERATION 

 
 

The demonstration mode provides simulated operation of the equipment. 
 
1.  Press the [MENU] key to open the menu. 
2.  Choose SYS SETUP and press the [ENT] key. 
3.  Choose DEMO and press the [ENT] key. 
4.  Choose ON or OFF as appropriate and press the [ENT] key. 
5.  Press the [DISP] key to close the menu. 
 
The indication SIM appears at the top of the screen when the demonstration 
mode is active. When the demonstration mode is first made active, 
SIMULATION MODE appears when the power is turned on and it is erased 
when any key is pressed. 
 
 

The internal type DGPS receiver is set at the factory for automatic reception. If 
you want to set it manually or are using an external beacon receiver, follow the 
procedure below. Note that DGPS increases position accuracy fix but it does not 
affect heading accuracy. 
 

1.  Press the [MENU] key to open the menu. 
2.  Choose DGPS and press the [ENT] key. 

DGPS

 

See Note

BEACON

:    

INT   

      

STATION

:   AUTO

RATE

:  000 BPS

FREQ

:  000.0 kHz

STATION

= - - -

DGPS DATA

= - - -

SIG. S: 55.2 dB  SNR: 22.0 dB

                                        

STATION: Shows GOOD or NG.

DGPS DATA: Shows GOOD or NG.

SIG. S = Signal Strength. A figure between 0  and 99 is shown. 
The higher the figure the stronger the beacon signal.

SNR = Signal to Noise Ratio. A figure between 1 and 22 is shown.
When your boat is in the service area of a beacon station, SNR
should be 21 or 22. If the figure is below 18 the position will be
inaccurate. If this happens, check for radar interference, poor
ground and generator noise on own ship.