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Events Menu
Introduction
An event is a special message that is generated on the card
asynchronously. This means that it is not the response to a request to the
card, but a spontaneous message.
What is the Goal
of an event?
The goal of events is to inform the environment about a changing
condition on the card. A message may be broadcast to mark the change in
status. The message is volatile and cannot be retrieved from the system
after it has been broadcast. There are several means by which the message
can be filtered.
DDP84 Events
The events reported by the DDP84 are as follows;
Announcements
Announcements
is not an event. This item is only used for switching
the announcement of status changes on/off. 0=off, other =on
Audio-Data
Error in Audio Data can be selected between 0 .. 255. 0= no event, 1..255
are the priority setting. In case of a Dolby data ERROR an Event will be
generated at the priority, or the audio carrier is falling away, or audio data
is in the range of 0 dBFS and -1 dBFS, or the Encoder status is in error.
Reference
Reference can be selected between 0 .. 255. 0= no event, 1..255 are the
priority setting. If the reference is lost an Event will be generated at the
priority.
What information
is available in an
event?
The message consists of the following items;
1)
A message string to show what has happened in text, for example:
“INP_LOSS”, “REF_LOSS”, “INP_RETURN”.
2)
A tag that also shows what happens, but with a predefined number:
e.g. 1 (= loss of input), 2 (= loss of reference), 129(= 1+128 = return of
input). For a list of these predefined tags see the table on the next page.
3)
A priority that marks the importance of an event. This value is defined
by the user and can have any value between 1 and 255, or 0 when
disabled.
4)
A slot number of the source of this event.
The Message
String
The message string is defined in the card and is therefore fixed. It may be
used in controlling software like Synapse Set-up to show the event.
Summary of Contents for DDP84
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