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SP-5000M-USB / SP-5000C-USB
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7.1.4 Acquisition frame rate
With Trigger OFF (free running mode – see section 7.2.1), the default frame rate of the camera is
based on the specified ROI. The smaller the ROI, the faster the default frame rate. However, it is
possible to specify a free-running frame rate (i.e., no trigger needed) that is slower than the
default rate. This can be useful when a longer exposure time is needed for a specific ROI.
Modification of the frame rate is done by entering a value in the AcquisitionFrameRate control
corresponding to the frame frequency. Allowed values range from 126953 Hz to 0.125 Hz for SP-
5000-USB. However, if the value entered is less than the time required for the default frame rate
of the specified format, the setting is ignored and the default frame rate is used. For example,
the minimum frame period for the smallest possible ROI (1 line) requires 126953 Hz (fps), so any
entry more than 126953 Hz (fps) will always be ignored.
The setting range in Acquisition Frame Rate is:
Shortest
to
Longest
Inverse number of time
required to drive all pixels
in the area set by ROI
command or
inverse number of time
required to transmit one
frame data
to
0.125 Hz (fps) = 8 seconds
For the above setting, Acquisition Frame Rate is used and its unit is Hz (fps).
Acquisition Frame Rate range: 126953 Hz (fps) to 0.125 Hz (fps)
Note: The acquisition frame rate may be limited to the maximum value which will fit
within the USB 3.0 bandwidth.
Frame Rate Max A
=
Calculate the maximum frame rate
within sensor output possible range
Frame Rate Max B
=
Calculate the maximum frame rate
within USB3.0 output band width
Frame Rate Max A
<
Frame Rate Max B
Frame Rate Max
=
Frame Rate Max A
Frame Rate Max
=
Frame Rate Max B
NO
YES