User Manual

© Xsens Technologies B.V.
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Parameter
Description
Line
The sync line to activate.
Polarity
Rising or falling edge, or rising and falling.
Trigger Once
It is not recommended to selected Trigger once, if more than one
recording using synchronisation of multiple systems will be made.
Skip First
The number of initial occurrences of the sync trigger to skip. This is
useful if a well-defined delay is expected, or if the external signal sends
the same signal to generate both a start and stop recording. Take for
example the command to start recording and stop recording, one
signal sent to the Awinda Station can generate two different
commands. Therefore if both start and stop are on the same sync line,
skip first should be 1 for stop recording, ensuring that the second
trigger, not the first, causes recording to stop.
Skip Factor
The number of occurrences of the sync trigger to skip in between
trigger signals. In the same way that was described in Skip First (above),
skip factor, for start and stop recording on one sync line should be set
to 1, to ensure that the first trigger starts the recording and the second
stops etc.
6.7.3 Important Notices for Sync In
When the Awinda Station is configured to start recording upon receipt of a trigger, it
initialises recording at the start of the following frame. The Awinda Station cannot trigger a
start recording command between frames since data received in a given frame is measured
in the previous one. Therefore, delaying the recording in this way ensures that data is not
recorded prior to the external trigger indication.
Recording should not be stopped between frames, since data received in a given frame was
measured during the previous frame. Therefore, the Awinda Station stops recording
immediately after the current frame.
Rising and falling edge polarity: This command is particularly useful for the ''Trigger
indication'' action for the following purposes:
An external system is connected and the behaviour with respect to its output signals is not
exactly known. The Awinda system can be configured to send a trigger indication to the
driver at every change of polarity. The user can then set the Awinda system to record and
log the incoming trigger indications (only one MTw is required). These logs can be correlated
with the actual actions performed.
Another useful example is to detect when a switch action occurs. An example can be a foot-
switch. A configured trigger indication with rising and falling edge sensitivity could detect
this.