EVS Broadcast Equipment SA
23
7 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.
DIO48 Events
The events reported by the DIO48 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
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.
Audio-Data
Audio-Data
reports the audio signal being clipped at 0dB and
can be selected between 0 .. 255. 0= no event, 1..255 is the priority
setting.
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.
