JRC JSS-2150 -, Instruction Manual

Page: 69 / 248

Operation
4-3
DSC alert sounds
The following table summarizes the alert characteristics when communicating particularly in the
DSC mode.
Reason for the alert Sound Increase Shutdown
Receiving a new distress
event Two tones of
2200Hz(250ms) and 1300Hz(250ms) Yes Manually
Acknowledging a received
distress event Two tones of
2200Hz(500ms) and 1300Hz(500ms) No Manually
Acknowledging a sent own
distress event Two tones of
2200Hz(500ms) and 1300Hz(500ms) No Manually
Receiving a new urgency
event Intermittent tones of
2200Hz(250ms) and silence(250ms) Yes Manually
Acknowledging a sent
urgency event Intermittent tones of
2200Hz(500ms) and silence(500ms) No Manually
Receiving a new safety or
routine event Two tones of
784Hz(1s) and 392Hz(1s) Yes Automatically
(10s)
Acknowledging a sent safety
or routine event Intermittent tones of
784Hz(1s) and silence(1s) No Automatically
(10s)
Receiving a DSC message
pertinent to an ongoing event Intermittent tones of
494Hz(100ms), silence(100ms) and
494Hz(1s) No Automatically
(1 cycle)
Pressing the dedicated
distress button An intermittent tone of
2000Hz(500ms) and silence(500ms) No ---
If receiving a DSC message with the ECC error, the alert is stopped automatically.
However, if the same DSC messages are received repeatedly and the every error is
corrected at last, the original alert may be sounded.
BAM alert sounds
In addition to DSC alerts, BAM (Bridge Alert Management) uses two short audible signals.
For details, see "6.3.5 BAM Alert sound".
Note