Fairchild CAM CCD-2KLV.TDI user manual Data Bus, Strobe, Lval Horizontal Synchronization

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PRELIMINARY

3.10 Data Bus

The 2K and 4K TDI cameras have 4 channels of 8-bit digital data in RS-644 (LVDS) format. See Reference B of this manual for detailed information on RS644. Both 2K and 4K TDI cameras output the clocking signals STROBE and LVAL.

3.10.1 STROBE

STROBE is an internal pixel clock inside the camera (fixed at 25 MHz) data rate. To acquire valid data, frame grabbers usually latch to the rising edge of STROBE with LVAL high.

3.10.2 LVAL (Horizontal Synchronization)

LVAL is a horizontal synchronization signal. When LVAL is in logic HIGH, the camera (2K or 4K TDI) will be outputting valid data.

Fairchild Imaging • CAM/CCD-2KLV.TDI & CAM/CCD-4KLV.TDI Line Scan Camera User’s Manual • Rev 073004 • 25 of 38

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Contents Osprey Camera Series Fairchild Imaging Osprey Camera Series USER’S Manual Table of Contents Providing External Trigger Using PCI-1424 Frame Grabber TroubleshootingHandling Instructions Product SupportDescription Camera Highlights2K x 96 TDI Sensor Architecture 4K x 96 TDI Sensor ArchitectureUsability ProgrammabilityFull Spectrum of Applications Image Sensor 2048 x 96 stages Block Diagram CCD5254096 x 96 stages Block Diagram CCD545D S Block Diagram 2K & 4K TDI Camera2K TDI Lvds 2K/4K TDI Camera Timing DiagramThermal Considerations Camera Hardware Interface Installation OverviewGood TDI Synchronization Bad TDI SynchronizationCamera Pin # Signal Name Connectors, Pinouts, and CablesLvds Data, J7 Signal Name Lvds Data, J8 Camera Pin # LED Indicator Status Lamp Power SupplyPower Up LED = RED Master Mode LED = GreenQuick Start with Lvds Interface Camera ControlControl Inputs Direct Trigger Providing External TriggeringLvds Trigger Source TTL Trigger Source Frame Grabber Receives TriggerFrame Mode A B B E R System Connection How to operate in framing modeHigh LOW TDI Length SelectionGain and Offset Calibration How to Modify Gain & Offset ValuesStrobe Data BusLval Horizontal Synchronization Mechanical and Optical Considerations Camera Dimensions and MountingLenses Preliminary Illumination Positioning Accuracy of the Sensor Chip in the CameraLight Sources 2K and 4K Lvds Cable Harness Lens ModelingElectrostatic Discharge Cleaning the Sensor WindowPreventing ESD Damage Protecting Against Dust, Oil and ScratchesCheck Simple Things First TroubleshootingUse the Camera Control Interface to Perform Checks Other Areas You Should CheckNo Output or Non Specification Output Data Clocking/Output SignalsEverything Seems to be Working, But No Image Horizontal Lines or Patterns in OutputBits That Do Not Change Value Product Support Reference a Providing External Trigger Using PCI-1424 Frame GrabberIntroduction to Lvds Getting Speed with Low Noise and Low PowerHow Lvds Works Lvds Standard