User`s manual

Camera Interface
2-14 Basler A500k
PRELIMINARY
2.5 Output Signals
Data is output from the A500k using the Camera Link standard. The Pixel Clock signal is described
in section 2.5.1, the Line Valid signal in section 2.5.2, the Frame Valid signal in section 2.5.3, and
the video data in section 2.5.4. How the Video Data is output is described in sections 2.5.5 and
2.5.7. Section 2.5.8 describes the Flash trigger output signal.
The A504
k uses a modification of the Camera Link standard. The Camera Link standard was
modified to be able to transmit 80 bits of data in parallel. Frame grabbers are available for the
Basler-specific bit assignment.
2.5.1 Pixel Clock
As shown in Figures 2-5 to 2-7 the pixel clock (PClk, also called strobe) is assigned to the XClk
pins (see also Table 2-6, Table 2-7, and Table 2-10). For the A504
k and A503k PClk is also
assigned to the YClk and ZClk pins of the Channel Link transmitter (see also Table 2-8 and Table
2-9), as defined in the Camera Link standard.
The pixel clock is used to time the sampling and transmission of pixel data. The Channel Link
transmitter(s) used in A500
k cameras require pixel data to be sampled and transmitted on the
rising edge of the clock.
The frequency of the pixel clock is 67.58 MHz for the A504
k and A503k and 50 MHz for the A501k.
With each Pixel Clock signal, 10 pixels for the A504
k, 8 pixels for the A503k, and 2 pixels for the
A501
k are transmitted.
2.5.2 Line Valid Bit
As shown in Figures 2-8 to 2-13, the line valid bit indicates that a valid line is being transmitted.
Pixel data is only valid when this bit is high. 128 (A504
k), 160 (A503k) or 640 (A501k) Pixel Clocks
are required to transmit one full line. In accord with the Camera Link standard, line valid is
connected to the Channel Link transmitter/receiver pair X, and in the A504
k and A503k also to Y
and Z (Figures 2-5 to 2-7, see also Tables 2-6 to 2-10).
2.5.3 Frame Valid Bit
As shown in Figures 2-8 to 2-13, the frame valid bit indicates that a valid frame is being
transmitted. One frame can contain 2 to 1024 Line Valid signals. Line valid and pixel data are only
valid when the frame valid bit is high. In contrast to the Camera Link standard, frame valid is only
connected to Camera Link X in the A504
k (see Table 2-6).
2.5.4 Video Data
Tab le 2-6 and Figure 2-5 show the assignment of pixel data bits to the input pins on the Channel
Link transmitters X, Y, and Z of the Camera Link in the camera and the corresponding output pins
on the Channel Link receivers X, Y, and Z in the frame grabber for the A504
k. They also show the
assignment for the frame valid bit and the line valid bit.These signals and the data transmitted via
the three Channel Link transmitter/receiver pairs is not assigned according to the Camera Link
standard. The Basler-specific connection is described in Table 2-6. Note that frame grabbers are
available for the Basler-specific pin assignment.
Tab le s 2-7 to 2-9 and Figure 2-6 show the assignment of pixel data bits to the input pins on the
Channel Link transmitters X, Y, and Z of the Camera Link in the camera and the corresponding
output pins on the Channel Link receivers X, Y, and Z in the frame grabber for the A503
k. They