User's Manual

Document MV0319P.N
© Xsens Technologies B.V.
MVN User Manual
141
23.2 Sync In
Sync In means that a third party device sends a control signal to the Awinda Station. The Awinda Station
can detect polarity changes on the input lines. This trigger may be a rising or falling edge as illustrated
in the following figures:
When a trigger is detected on one of the input lines, the Awinda Station can be configured to perform a
certain action. Combinations of any of the following are possible on each Sync In port:
Sync Type
Description
Start Recording
External system sends a start recording trigger. On the Awinda Station, this
will be the next frame.
Stop Recording
External system sends a stop recording trigger.
A number of parameters can be set for each action:
Parameter
Description
Sync Line
The sync line to activate.
Pulse Polarity
Rising or falling edge, or rising and falling.
Trigger Once
It is not recommended to select Trigger once if more than one recording
using synchronization of multiple systems will be made. This is a failsafe
option in the case third party systems send pulses throughout recordings.
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.
NOTE: If the user selects Sync In but selects a function from the drop-down menu that is only available
as Sync out (namely, settings other than start or stop recording), the software will automatically change
the sync channel to Out 1.
Therefore care is required when matching sync in or out with the functions available.