Basler racer, Manual, Page: 17 / 46

AW00118702000 Camera Link Implementation
Basler racer Camera Link 11
1.4 Camera Link Input Signals
The input signals that the camera can accept via the Camera Link interface include a Serial to
Camera signal and an External Line Start Trigger signal as described below.
1.4.1 Serial to Camera
The Serial To Camera (SerTC) input signal is an RS-644 LVDS signal as specified in the Camera
Link standard. The signal is input to the camera on pins 7 and 20 of the base SDR connector as
specified in the standard and as shown in Fig. 2 on
page 6 . The camera is equipped for RS-644
serial communication via a serial port integrated into the frame grabber as specified in the Camera
Link standard.
The RS-644 serial connection in the Camera Link interface is used to issue commands to the
camera that change parameter values. The serial link can also be used to query the camera about
its current setup.
1.4.2 External Line Start Trigger (ExLSTrig)
The camera can be set to accept an External Line Start Trigger (ExLSTrig) input signal to control
exposure and readout of the camera’s sensor. When the ExLSTrig signal is applied to the camera
via the Camera Link interface, it is an LVDS signal as specified for RS-644. By default, the camera
will accept an ExLSTrig signal on the CC1 input in the Camera Link interface (pins 9 and 22 of the
MDR connector) as specified in the Camera Link standard. The camera can also be configured to
accept the ExLSTrig signal on CC2, CC3 or CC4.
When the camera is under the control of an ExLSTrig signal, it can be set to function in two
exposure time control modes: timed or trigger width. ExLSTrig can be a periodic or non-periodic
function. The frequency of the ExLSTrig signal determines the camera’s line rate in these modes.
Note that ExLSTrig is edge sensitive and therefore must toggle. The minimum high time for the
ExLSTrig signal is 1 µs and the minimum low time is also 1 µs.
The ExLSTrig signal is typically supplied to the camera by the frame grabber board.
For details about using a line start trigger with racer cameras, refer to the Basler racer Camera Link
User’s Manual (001185xx000) .