Dalsa PC2-Comp Express OC-P2EM-COMP0 User Manual
                                                                          | |
Contents
| 
26 • Theory of Operation PC2-Comp ExpressFrame LostThe Frame Lost event indicates that an acquired image could not be transferred to onboard memory.An example would be if there were no free onboard buffers available for the new image. This willusually be the case if the image transfer from onboard buffers to host PC memory cannot be sustaineddue to PCI bus bandwidth. If multiple PCI bus master devices are active simultaneously, it is possiblethat the PC2-Comp Express PCI controller cannot transfer onboard buffers in time for the nextacquired frame. The Sapera event value is CORACQ_VAL_EVENT_TYPE_FRAME_LOST.Start of FrameThe Start of Frame event represents the beginning of a full frame transfer from front end to onboardmemory. For interlaced video, there is one Start of Frame event for each pair of fields. The Saperaevent value is CORACQ_VAL_EVENT_TYPE_START_OF_FRAME.Start of FieldThe Start of Field event is only available for interlaced scan cameras. There is a Start of Field event atthe beginning of each field transferred from front end to onboard memory (two per frame). The Saperaevent value is CORACQ_VAL_EVENT_TYPE_START_OF_FIELD.Start of Odd FieldThe Start of Odd Field event is only available for interlaced scan cameras. There is a Start of OddField event at the beginning of each incoming odd field transferred from front end to onboard memory.The Sapera event value is CORACQ_VAL_EVENT_TYPE_START_OF_ODD.Start of Even FieldThe Start of Even Field event is only available for interlaced scan cameras. There is a Start of EvenField event at the beginning of each incoming even field transferred from front end to onboardmemory. The Sapera event value is CORACQ_VAL_EVENT_TYPE_START_OF_EVEN.End of FrameThe End of Frame event is generated when the last image pixel is transferred from front end toonboard memory. The Sapera event value is CORACQ_VAL_EVENT_TYPE_END_OF_FRAME.End of FieldThe End of Field event is only available for interlaced scan cameras. There is an End of Field eventwhen the last field has been transferred from front end to onboard memory. The Sapera event value isCORACQ_VAL_EVENT_TYPE_END_OF_FIELD. |
Related manuals for Dalsa PC2-Comp Express OC-P2EM-COMP0
This manual is suitable for:
manualsdatabase
Your AI-powered manual search engine