Camera Interface
2-10
Basler L301kc
DRAFT
2.5.5 Video Data Output Modes
The
L301
kc
can operate in the following modes:
• 20 MHz 8 Bit RGB mode
• 60 MHz Single Pixel 10 Bit mode
• 60 MHz Single Pixel 8 Bit mode
• 40 MHz Dual Pixel 10 Bit mode
• 40 MHz Dual Pixel 8 Bit mode.
Operation in 20 MHz 8 Bit RGB Mode
In 20 MHz 8 Bit RGB mode, the pixel clock operates at 20 MHz. On each clock cycle, the camera
transmits 8 bits of data for a red pixel, 8 bits of data for a blue pixel, 8 bits of data for a green pixel,
and a line valid bit. The assignment of the bits is shown in Table 2-3.
The pixel clock is used to time data sampling and transmission. As shown in Figure 2-4 and Figure
2-5, the
L301
kc
samples and transmits data on each falling edge of the pixel clock.
The line valid bit indicates that a valid line is being transmitted. Pixel data is only valid when this
bit is high.
Video Data Sequence
When the camera is not transmitting valid data, the line valid bit sent on each cycle of the pixel
clock will be low. Once the camera has completed line acquisition, it will begin to send valid data:
• On the pixel clock cycle where valid line data transmission begins, the line valid bit will
become high. Eight of the bits transmitted during this clock cycle will contain the data for pixel
number one in the red line, eight of the bits will contain the data for pixel number one in the
green line, and eight of the bits will contain the data for pixel number one in the blue line.
• On the next cycle of the pixel clock, the line valid bit will be high. Eight of the bits transmitted
during this clock cycle will contain the data for pixel number two in the red line, eight of the
bits will contain the data for pixel number two in the green line, and eight of the bits will con-
tain the data for pixel number two in the blue line
This pattern will continue for 2098 cycles of the pixel clock as the data for the 2098 pixels in
the lines is transmitted.
• After the data for all 2098 pixels in the lines has been transmitted, the line valid bit will
become low indicating that valid line data is no longer being transmitted.
L
The data sequence outlined below, along with Figure 2-4 and Figure 2-5, describe
what is happening at the inputs to the Camera Link transmitter in the camera.
Note that the timing used for sampling the data at the Camera Link receiver in the
frame grabber varies from device to device. On some receivers, data must be sam-
pled on the rising edge of the pixel clock (receive clock), and on others, it must be
sampled on the falling edge. Also, some devices are available which allow you to
select either rising edge or falling edge sampling. Please consult the data sheet for
the receiver that you are using for specific timing information.
Summary of Contents for L301kc
Page 1: ...Basler L301kc USER S MANUAL Document Number DA00051806 Release Date 13 July 2007...
Page 4: ......
Page 14: ...Introduction 1 6 Baslert L301kc DRAFT...
Page 20: ...Camera Interface 2 6 Basler L301kc DRAFT Figure 2 3 Camera Frame Grabber Interface...
Page 102: ...Configuring the Camera 4 32 Basler L301kc DRAFT...
Page 116: ...Troubleshooting 6 10 Basler L301kc DRAFT...
Page 118: ...Revision History ii Basler L301kc DRAFT...
Page 120: ...Feedback iv Basler L301kc DRAFT...
Page 124: ...Index viii Basler L301kc DRAFT...