Nikon MRDI user manual Video Data Signals, Camera Control Signals, Communication

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Video Data Signals

The Channel Link technology is integral to the transmission of video data. Image data and image enable signals are transmitted on the Channel Link bus. Four enable signals are:

FVAL-Frame Valid (FVAL) is defined HIGH for valid lines

(not used by the

 

CAM/CMOS – 2K.LS).

LVAL-Line Valid (LVAL) is defined HIGH for valid pixels

(LineValid Output in the

CAM

CMOS – 2K.LS).

DVAL-Data Valid (DVAL) is defined HIGH when data is valid

(Always High in the

 

CAM/CMOS – 2K.LS).

Spare- A spare has been defined for future use

(not used by the CAM/CMOS–

 

2K.LS).

In the general specification, all four enable signals must be provided by the camera on each Channel Link chip. All unused data bits must be tied to a known value by the camera.

For more information on image data bit allocations, refer to the official CameraLinkTM specification (http://www.machinevisiononline.org.).

Camera Control Signals

Four LVDS pairs are reserved for general-purpose camera control. They are defined as camera inputs and frame grabber outputs. Camera manufacturers can define these signals to meet their needs for a particular product. In the case of the Fairchild Imaging CAM/CMOS - 2K.LS, the signals are:

•

"ExSync" Line Synchonization Input

(generically Camera Control 1, CC1)

•

"ElectShutter" Exposure Control Input

(generically Camera Control 2, CC2)

•

Spare, unused

(generically Camera Control 3 ,CC3)

•

Spare, unused

(generically Camera Control 4, CC4)

Communication

Two LVDS pairs have been allocated for asynchronous serial communication to and from the camera and frame grabber. Cameras and frame grabbers should support at least 9600 baud. These signals are:

SerTFG

Differential pair serial communications to the frame grabber.

SerTC

Differential pair serial communications to the camera.

The serial interface will have the following characteristics: one start bit, one stop bit, no parity, and no handshaking. It is recommended that frame grabber manufacturers supply both a user interface and a software application programmming interface (API) for using the asynchronous serial communication port. The user interface will consist of a terminal program with minimal capabilities of sending and receiving a character string and sending a file of bytes. The software API will provide functions to enumerate boards and send or receive a character string.

Fairchild Imaging • CAM/CMOS-2K.LS Line Scan Camera User’s Manual • Rev A • 36 of 41

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Contents OWL Camera Series CAM/CMOS-2K.LS CAM/CMOS-2K.LS Line Scan Camera Rev a Fairchild Imaging, Inc TerminologyTable of Contents Troubleshooting Handling InstructionsProduct Support Camera Link IntroductionCamera Highlights DescriptionProgrammability UsabilityCamera Specification RDI and Mrdi Performance Specification Full Spectrum of ApplicationsThermal Considerations LinkRDI and Mrdi Responsivity Curve Image Sensor Page Installation Overview Connectors, Pinouts, and CablesCamera Hardware Interface Power Supply Camera Pin # Frame Grabber Pin # Channel Link SignalLED Indicator Status Lamp Hirose HR25-7TR-4P ReceptacleBack View of CAM/CMOS 2K.LS Commands Camera ControlQuick Start with the Camera LinkTM Interface You must cover lens when performing this operation SSM LED Camera Command Summary Command Definition SummaryFour Modes for Synchronizing with the CAM/CMOS 2K.LS GSNSummary of CAM/CMOS-2K.LS Modes Line Start End 2 -- Mode 1 Freerunning 3 -- Mode 2 ExSync Synchronization Data Camera Output ElectShutter Synchronization Timing Values CAM/CMOS-2K.LSCamera Dimensions and Mounting Facilities Mechanical and Optical GuidanceLensing Lens Mount Extender TubePage Page Lenses Positioning Accuracy of the Sensor Chip in the CameraIllumination Light SourcesLens Modeling Cleaning the Sensor Window Handling InstructionsElectrostatic Discharge Preventing ESD DamageTroubleshooting Check the Obvious Things Out FirstUse the Camera Control Interface to Perform Checks Other Areas You Should CheckData Clocking/Output Signals No Output Or Non Specification OutputEverything Seems To Be Working, But No Image Horizontal Lines or Patterns in OutputProduct Support Channel Link is a Widely-Used Signaling Method Camera LinkTM IntroductionVideo Data Signals Camera Control SignalsCommunication Power Port AssignmentsFor More Information on CameraLinkTM Camera Link Connections -- the MDR 26-Pin Connector Figure A.1 Channel Link OperationPage Page Figure A.4 Camera Link Cable
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