JAI TMC-4200GE Pulse Width Control Mode, Asynchronous Programmable External Trigger

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TM-4200GE Hardware

FIGURE 65. Asynchronous Programmable External Trigger

9.3.5Pulse Width Control Mode

In Pulse Width Control (PWC) Mode, the exposure time is controlled by the external trigger. When an external trigger is applied, one discharge signal (Vsub) is generated right after the active edge of the trigger. The exposure starts when the discharge signal is in the off state. The exposure is off following the trigger active off. Exposure time is controlled by the pulse width of the external trigger. Because the CCD requires some overhead from trigger active off to the transfer gate event, the actual exposure time is equal to:

Exposure Time = Pulse Width +20.6μs

Since one discharge signal (Vsub) is generated right after the active edge of the trigger, it is asynchronous with LDV, and the discharge signal may happen during an active video transfer period, visible reset noise may show in the current image. To avoid reset noise, the maximum trigger frequency in PWC mode should be less than 1/ (exposure time + one frame transferring time).

The minimum active period of the external trigger is 5μs. Theoretically, the maximum active period of the external trigger is unlimited. But, due to the usability of images at 25oC it is recommended the active period of the external trigger be no longer than one second.

Operation

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Contents TM/TMC-4200GE Progressive Scan Cameras Page CE Compliance JAI IncPage Table of Contents Table of Contents IntroductionTroubleshooting Table of Contents List of Figures List of FiguresList of Figures List of Tables List of Tables Related Documents Software IntroductionScope of the Document Gigabit Ethernet Camera InterfaceSoftware Installation Before Installing the GigE Series Camera-SDK SoftwareInstalling the Software Uninstalling the Software Scanning for DriversQuick-Start Change and Remove ButtonsSelect Camera Window Hirose Connector, Pin Assignment ConnectorsPower and Signals Connector ConnectorsGigE EthernetConfiguring the TM-4200GE Camera SetupConfiguring the TM-4200GE Camera Advanced Configuration Window Configuring the Imager Integrated GigE Camera SoftwareCheck the Current Camera Setting Configuring the Internal Frame GrabberTM-4200GE Software GUI Features ModesAdvanced Configuration Port Communication Exposure ControlShutter Mode Shutter SpeedTM-4200GE Software Scan Mode Programmable ScanUser Programmable Variable Partial Scan Programmable Scan Set Dialog Box Gain TM-4200GE Software Gain SettingsGain R Auto Gain ControlLook-Up Table Memory PagesFree-Running Mode Externally TriggeredInternally Triggered TM-4200GE Software Save/Restore Settings to Your Hard Disk White Balance Control Color Versions OnlyExit TM-4200GE Software Main Menu OptionVersion Test PatternCamera Inputs Signal HandlingSignal Handling Camera OutputsGE Camera Gpio Control Block Gpio Look-Up Table Input Signal Description Label Gpio Label TableGpio Look-Up Table Input Labels Output label Signal Description Pulse GeneratorsGpio Look-Up Table Output Labels Pulse Generator Scan Mode GigE Series Camera Serial CommandsTM/TMC-4200 Command List GigE Series Camera Serial CommandsDual Tap Digital Video Output Order Channel BalanceVsub Image Pre-processingCommand Responses Parameter End of Cmd Description Command Parameter End of Cmd Description0000=Async no shutter 0001 1000=Async Introduction Dual-Tap TM-4200GE AccuPiXEL Series Camera-Control SoftwareDual-Tap TM-4200GE AccuPiXEL Series Camera-Control Software IntroductionAccuPIXel Setup screen Using the GigE mode TM/TMC-4200GE CameraGUI Features Main DualTap AccuPiXEL WindowOperating The Control Software Introduction Scan Area Scan Area drop down boxGain Control Offset VoltageVideo Depth Click on the option button to set the preferred optionLUT Look-Up Table Positive or Negative LUT SelectionDual-Tap TM-4200GE AccuPiXEL Series Camera-Control Software Load PasswordEeprom SaveDual-Tap TM-4200GE AccuPiXEL Series Camera-Control Software TM-4200GE Hardware Hardware IntroductionProduct Description Hardware IntroductionFeatures Getting Started InstallationAccessories and Options Unpacking Instructions2 a 12-Pin Connector Camera SetupConnector Pin Configurations Pin ConnectorPower Supplies and Power Cable Setup Ethernet ConnectorPower Supplies Attaching the Power Cable to the Connector JAI Inc. Power CablesBuilding Your Own Power Cable 12P-02S Interface Cable Pin# Lead Color FunctionAdjustable Back-Focus TM-4200GE Hardware Attaching the Camera LensProgressive Scanning Preset Scan AreaOperation OperationTM-4200GE Hardware Programmable Scan Area Full Scan Area 2x2 Binning BayerSub-sampling Digital Zoom X2 BinningSub-sampling Digital Zoom TM-4200GE Hardware Bayer Color Filter Color Versions Sub-sampling Digital Zoom Scan Area Start PointsTM-4200GE Hardware Color Filter Array Bayer Color Filter Array CFATM-4200GE Hardware Starting Pixel Configuration Sync and DataCamera Functions Example of TMC-4200GE Same as TM-4200GETM-4200GE Hardware Timing Chart Scan ModeElectronic Shutter Interpolation SoftwareColor Interpolation Asynchronous No Shutter Mode TM-4200GE Hardware Preset ShutterProgrammable Exposure-Continuous Mode Electronic Preset ShutterAsynchronous Programmable Exposure Mode External Trigger TimingPulse Width Control Mode Asynchronous Programmable External TriggerParticle Imaging Velocimetry Fixed Exposure Mode Pulse Width Control TriggerTM-4200GE Hardware PWC PIV Mode PWC PIV Timing Table Asynchronous Mode ChartDynamic Range Control Programmable Look-Up Table LUT and Knee ControlCamera Timing Charts External Sync and Pixel LockingScan Data Horizontal pixels Area ClockAsync Reset Timing Scan AH lines Area AI lines Lines Μsec External HD Locking and External VD ResetAsync Reset Sec LinesSymptom No Video TroubleshootingProblems and Solutions Symptom Dark VideoTM-4200GE Hardware Symptom Video does not Display Properly Symptom Notebook Computer Driver Installation ProblemsInformation and Support Resources Appendix SpecificationsTM-4200GE Camera Specifications Table AppendixTM-4200GE Hardware 11.1.1 TM-4200GE Physical Dimensions Physical DimensionsTM-4200GE Hardware Spectral Response Spectral ResponseAppendix Page W . j a i . c o m