Cheetah KAC Camera User Manual | Camera Link (CLF) Interface
October 1, 2019
Page
90
of
135
Rev 7.2
convergence depending upon the A/D digitization level selected and this can impact the
maximum frame rate.
10-bit digitization: ~9 micro-seconds
12-bit digitization: ~20 micro-seconds
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.
C4080 Frame
Rates (fps)
12-bit
CL 4-taps
10-bit, CL 8-
taps
8-bit, CL 10-
taps
Full Resolution
27
50
67
3840 x 2160
40
82
90
1920 x 1080
80
172
172
1280 x 720
110
243
243
Table 18: C4080 AOI frame rate for various AOIs.
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.
C2880 Frame
Rates (fps)
12-bit, CL
4-tap
10-bit, CL
8-tap
8-bit, CL 10-
tap
Full Resolution
50
80
129
1920 x 1080
143
241
241
1280 x 720
202
342
342
640 x 480
275
473
473
Table 19: C2880 Maximum Frame Rate for various AOIs
