Sony FS-1570 Benutzerhandbuch

3 DSC 

OVERVIEW 

The individual call is for sending a call to a specific station.   

Coast

Station

Own Ship

(1) DSC Message [Called Acknowledge

Request (ACK RQ) Signal]

(2) Acknowledge Back (ACK BQ) Signal

(3) Voice or telex communication

(1)

(2)

(3)

 

1.  Prepare call and transmit it by pressing the [CALL] key. The equipment then awaits 

acknowledgement of the call. 

2.  Receive acknowledge back (ACK BQ) signal from other party (coast station or ship 

station) within about five minutes. The audio alarm sounds at this time; press the 
[CANCEL] key to silence it. 

3.  After receiving the ACK BQ signal, communicate with other party; the radiotelephone 

automatically sets the working frequency and class of emission you specified. 

 
 

When you receive a distress alert or routine call addressed to your ship, the audio and 
visual alarms are released. For the distress or urgency call, the audio alarm sounds until 
the [CANCEL] key is pressed, and sounds for one second and then automatically goes off 
in case of other calls. The tone of the alarm changes with the call received. By becoming 
accustomed to the tone, you can know which type of call you have received.   
 

Safety call received 

1300 Hz and 0 Hz (250 ms) 

Routine, Ship's Business call 
received 

880 Hz and 440 Hz (500 ms) 

While DISTRESS button is 
pressed for three s 

2200 Hz and 0 Hz (125 ms) 

Distress alert sent 

2200 Hz, continuous 

Own ship position not updated 2200 Hz (50 ms), three beeps 

every two s 

Distress alert, urgency 
message received 

1300 Hz and 2200 Hz (250 ms) 

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