Timestamp Chunk - Basler acA2040-55 User Manual

Features

7.23.3.4 Timestamp Chunk

The Timestamp chunk feature adds a chunk to each acquired image containing a timestamp that
was generated when frame acquisition was triggered.
The timestamp is a 64 bit value. The timestamp is based on a counter that counts the number of
"timestamp clock ticks" generated by the camera. The unit for each tick is 1 ns (as specified by the
Gev Timestamp Tick Frequency). The counter starts at camera power on, camera reset or at
counter reset.
To enable the timestamp chunk:
1. Use the Chunk Selector to select the Timestamp chunk.
2. Use the Chunk Enable parameter to set the value of the chunk to true.
Once the Timestamp chunk is enabled and Chunk Mode Active (see Section 7.23.4 on
is enabled, the camera appends a Timestamp chunk to each acquired image.
After an image with an appended chunk has been received by your computer the chunk must be
retrieved. For information about retrieving data chunks, see Section 7.23.5 on
You can set the Chunk Selector and Chunk Enable parameter value from within your application
software by using the Basler pylon API. The following code snippet illustrates using the API to
activate the chunk mode, and enable the Timestamp chunk:
// make chunk mode active and enable Timestamp chunk
camera.ChunkSelector.SetValue(ChunkSelector_Timestamp);
camera.ChunkEnable.SetValue(true);
You can also use the Basler pylon Viewer application to easily set the parameters.
For more information about the pylon Camera Software Suite and the pylon Viewer, see Section 3.1
on page 61.
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