Guralp Systems CD1.1 - Manual (Page 10)

CD1.1 Tools for Platinum
At T
0
+ 11 seconds, the first subframe arrives at the station.
The multiplexer inspects the time-stamp and, as it has not seen
any subframes labelled T
0
before, it stores the subframe in a
new collection, labelled T
0
, and sets an alarm (specific to this
collection) for the current time (T
0
+ 11) plus the time-out - i.e.
T
0
+ 14 seconds.
At T
0
+ 12 seconds, the second subframe arrives at the
station. The multiplexer inspects the time-stamp and places
the subframe in the existing T
0
collection. At T
0
+ 13 seconds,
the third subframe arrives and is treated identically. At this
point, the multiplexer does not know that it has received all the
subframes, so it carries on waiting.
At T
0
+ 14 seconds, the alarm for this collection fires and the
multiplexer assembles all the subframes from the T
0
collection
into a frame and passes it to the data-out-cd11 module(s).
The collection is moved to the data store and is no longer
considered active.
Now consider the case where the third communication link is
interrupted for, say, five seconds, starting at T
0
+ 10. The first
and second subframes will arrive as before and, at T
0
+ 14
seconds, they will be assembled into a frame and transmitted.
10 Issue C