8.Features
© 2023 China Daheng Group, Inc. Beijing Image Vision Technology Branch 167
DeviceLinkThroughputLimit is less than the current device acquisition bandwidth, the current device
acquisition bandwidth will be reduced to the limit of the DeviceLinkThroughputLimit, the current device
acquisition bandwidth can be read from the camera.
When the camera is working in trigger mode, the bandwidth limit will restrict the maximum trigger frequency.
Example 1:
The MER2-502-79U3M/C(-L) is working in continuous mode, the DeviceLinkCurrentThroughput is
35000000Bps, the DeviceLinkThroughputLimit is 40000000Bps, and then the DeviceLinkCurrentThroughput
is still 35000000Bps. If the DeviceLinkCurrentThroughput is 70000000Bps, the DeviceLinkThroughputLimit
is 40000000Bps, and then the DeviceLinkCurrentThroughput will be 40000000Bps.
Example 2:
The MER2-502-79U3M/C(-L) is working in trigger mode, the DeviceLinkCurrentThroughput is 300000000Bps,
the maximum trigger frequency is 59.8Hz @ full resolution (8bit), when the DeviceLinkCurrentThroughput is
35000000Bps, the maximum trigger frequency is 6.9Hz @ full resolution (8bit).
Model
Min. of
DeviceLinkThroughputLimit
Max. of
DeviceLinkThroughputLimit
Step of
DeviceLinkThroughputLimit
MER2-U3(-L)
35000000Bps (8bit)
400000000Bps
1000000Bps
70000000Bps (10bit)
70000000Bps (12bit)
ME2S-U3
35000000Bps (8bit)
400000000Bps
1000000Bps
700000000Bps (10bit)
700000000Bps (10bit)
ME2P-U3
35000000Bps (8bit)
400000000Bps
1000000Bps
70000000Bps (12bit)
ME2L-U3(-L)
35000000Bps (8bit)
200000000Bps
1000000Bps
700000000Bps (10bit)
700000000Bps (10bit)
Table 8-5 MERCURY2 USB3 Vision camera bandwidth control
8.5.4.
Camera Acquisition Time
The acquisition time of the camera is related to the OffsetY and height of the image ROI. When the OffsetY
and height change in the ROI setting, it will affect the frame period captured by the camera front end, which
will affect the acquisition frame rate.
The formulas are as follows:
MER2-041-436U3M/C(-L)
The row period (unit: μs):
T
row
=
147
37.5
= 3.92