Furuno FM-8800D Service Manual page 23

12. Alarm sound
The alarm sound level when receiving all DSC messages turns up increasingly.
ALM sound
Distress Received
Distress ACK Received
Urgency Received
Urgency ACK Received
Routine Received
Safety Received
Routine ACK Received
Safety ACK Received
Warning
Press DIS button
Note: Alarm sound level is adjusted in SYSTEM menu -> "MAX VOL ADJ".
Freq:
Tone-1 Tone-2
2200 Hz 1300 Hz
2200 Hz 1300 Hz
2200 Hz Silence
2200 Hz Silence
150 Hz 100 Hz
150 Hz 100 Hz
150 Hz 100 Hz
150 Hz 100 Hz
2000 Hz Silence
2000 Hz Silence
Freq: Duration:
Tone-1
250 ms
500 ms
250 ms
500 ms
1000 ms
1000 ms
1000 ms
1000 ms
250 ms
500 ms
6/6
Duration:
Tone-2
250 ms
500 ms
250 ms
500 ms
500 ms
500 ms
1000 ms
1000 ms
500 ms
500 ms