Imperx Cheetah Series User Manual page 90

Cheetah KAC Camera User Manual | Camera Link (CLF) Interface
convergence depending upon the A/D digitization level selected and this can impact the
maximum frame rate.
For example, if 12-bit digitization is selected, then two rows (one line) can be digitized in
20 micro-seconds. This means that since 3136 rows (1,568 lines) in the C4080 camera
must be read out, digitizing the entire image array consumes 31mS per frame and the
frame rate is limited accordingly.
Output Interface Bandwidth:
The bandwidth of the output interface can also impact the maximum achievable frame
rate. For example, with Camera Link Base (2 taps selected) and with 10-bit digitization and
10-bit output mode selected, the camera will output 13 full-frames per second limited by
the output interface bandwidth of 2.04 Gbps.
Triggered Dual Video Mode: The camera normally overlaps the exposure time of one
frame with the readout of the previous frame. In Triggered Dual Video Mode, the
exposure time and readout time are not overlapped and the total readout time is the sum
of the exposure and readout times. In dual video mode, line time is controlled by the
Frame A line time register.
5.5.3.1 AOI Frame Rate Examples
The Tables below describe resulting frame rate (FR) for various AOIs using Camera Link
Deca output. The frame grabber speed will impact results and values below assume an x8
speed frame grabber. The camera will calculate and display the actual frame rate at any
horizontal and vertical window selection.
Examples of C4080 Frame Rate performance at full resolution and within selected AOIs for
10 and 12-bit digitization are described.
Examples of C2880 frame rate performance at full resolution and within selected AOIs for
8, 10 and 12-bit digitization are described in the following table.
October 1, 2019
10-bit digitization: ~9 micro-seconds
12-bit digitization: ~20 micro-seconds
C4080 Frame 12-bit
Rates (fps) CL 4-taps
Full Resolution 27
3840 x 2160 40
1920 x 1080 80
1280 x 720 110
Table 18: C4080 AOI frame rate for various AOIs.
C2880 Frame 12-bit, CL
Rates (fps) 4-tap
Full Resolution 50
1920 x 1080 143
1280 x 720 202
640 x 480 275
Table 19: C2880 Maximum Frame Rate for various AOIs
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10-bit, CL 8- 8-bit, CL 10-
taps taps
50 67
82 90
172 172
243 243
10-bit, CL 8-bit, CL 10-
8-tap tap
80 129
241 241
342 342
473 473
Rev 7.2