National Instruments PXI-1428 - Manual (Page 29)

Chapter 4 Signal Connections
IMAQ PCI/PXI-1428 User Manual 4-4 ni.com
Connector Signal Connection Descriptions
Table 4-1 describes the MDR-26 and 68-pin VHDCI signal connections.
Table 4-1. I/O Connector Signals
Signal Name Description
TTL_TRIG<3..0> TTL external triggers/DIO lines (input/output)
DGND A direct connection to digital GND on the IMAQ 1428
CHASSIS_GND A direct connection to the computer chassis, which is grounded through the
power cord
X<3..0>± LVDS Base configuration data and enable signals from the camera to the
acquisition device
Y<3..0>± LVDS Medium configuration data and enable signals from the camera to the
acquisition device
XCLK± Transmission clock on the Base configuration chip for Camera Link
communication between the acquisition device and the camera
YCLK± Transmission clock on the Medium configuration chip for Camera Link
communication between the acquisition device and the camera
SerTC± Serial transmission to the camera from the image acquisition device
SerTFG± Serial transmission to the frame grabber from the camera
CC<4..1>± Four LVDS pairs, defined as camera inputs and acquisition device outputs,
reserved for camera control
On some cameras, the camera controls allow the acquisition device to control
exposure time and frame rate.