OPERATING AND USER MANUAL QUARTZ series CXP
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Example: resolution 2048 x 512 @ 10 bit, CXP-6 single interface
Applying the equations in sections 6.4.1 and 6.4.2:
The 2048 x 512 acquisition maximum frame rate is 707 fps.
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The 2048 x 512, 10 bit CXP-6 single, transmission maximum frame rate is 453 fps.
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When BurstRequestMode is set to RequestModeAuto, the images are simultaneous to acquisition
transmitted over the interface (at the maximum interface speed). As a result, the buffer memory fills up
at a rate:
707 fps - 453 fps = 254 fps
Recall from the start of section 6.4 that the total storage capacity of the memory in pixels is 2^31 / 10
= 214748364. This corresponds to:
214748364 / 2048 / 512 = 204 images at chosen resolution.
At the fill rate of 220 fps, the capture burst takes:
204 / 254 fps = 0.80 seconds burst time untill the buffer is full and capture has to halt.
During these 0.80s, the total number of captured images is:
0.80s * 707 fps = 567.
After the end of the burst, the next burst may start when the buffer memory is emptied again. This
takes:
204 / 453 fps = 0.45 seconds.
In short, at 2048 x 512 @ 10bit and CXP-6 single, the camera can capture a burst of 567 images at 707
fps. This takes 0.80 seconds after which 0.45 seconds is needed to empty the buffer again and the
next burst may start.
Explanation of the available exposure modes
6.4.5.
Timed mode (continuous mode, free run)
The timed mode is the most basic mode of operation, in which acquisition and frame output is done
autonomously regardless trigger inputs.
Images are captured with an integration time and frame period set by the user.
The minimum frame period (corresponding to the highest frame rate) is for a given configuration given
by the minimum of equations 6.1 and 6.2.
To prevent buffer memory overflow, the BurstRequestMode must be set to RequestModeAuto (images
are output immediately after acquisition).
TriggerWidth mode (normal control mode)
If ExposureMode is set to TriggerWidth, the the state of the external control pulse (section 3.2)
determines start and end of integration, the latter coinciding with start of readout.