JAI EL-2800M-USB User Manual

Contents

JAI EL-2800M-USB User Manual Manual pdf 8 page image

EL-2800M-USB / EL-2800C-USB- 6 -Before using USB 3.0 cameraEMVA 1288With regard to signal to noise ratio in this manual, specifications measured by EMVA 1288 are usedtogether with specifications by a traditional measurement method.EMVA 1288 is a more complete measurement that considers multiple noise sources, includingrandom noise, pattern noise, and shading. Additionally, EMVA 1288 incorporates temporal variancesin pixel output by capturing 100 frames of data and computing the RMS variations over the capturedframes. Because of the comprehensive nature of the noise analysis and the additional considerationfor RMS variances over time, EMVA 1288 SNR measurements are inherently lower than the traditionalSNR measurements given by manufacturers. However, the comprehensive nature combined withrigid test parameters, means that all manufacturers are measuring their products equally and EMVA1288 tested parameters can be compared among different manufacturers’ products.In order to learn more about EMVA 1288, please visit http://www.emva.orgInterfaceThe EL-2800-USB employs a USB 3.0 interface and is in the process of being certified for compliancewith the USB3 Vision standard. USB3 Vision is a new standard interface for machine visionapplications being developed and managed by the AIA (Automated Imaging Association). USB3 Visionuses USB 3.0 ports that will soon be standard on most PCs (with Windows 7 service pack and Windows8 native support expected soon). Components from different manufacturers will easily communicatewith each other.USB3 Vision also supports the GenICamTM standard which is managed by the EMVA (European MachineVision Association). The purpose of the GenICam standard is to provide a common program interfacefor various machine vision cameras. By using GenICam, cameras from different manufacturers canseamlessly connect in one platform.The maximum transfer speed of USB 3.0 is specified at 5.0 Gbps, however effective bandwidth isreduced by a number of factors including pixel format conversions and the physical interfacecomponents used. The USB3 Vision standard specifies a bandwidth of 2.8 Gbps or greater. Maximumcable length for passive cables is five meters, but this can be made longer using active cables.As for the USB connector, EL-2800-USB uses a Micro B connector which complies with USB 3.0. Thisconnector has an additional 5-pin plug “stacked” on the side of a standard USB 2.0 Micro Bconnector. However, USB 2.0 cannot be used with the EL-2800-USB.Power supplyAlthough the USB 3.0 interface is capable of supporting both data and power, EL-2800-USB requiresboth +5V and +12V. A separate power supply unit must be connected to the 12-pin connector forproviding +12V.Computer used for EL-2800-USB seriesIt is necessary to use a PC equipped with a USB 3.0 interface. It is also recommended to use a PCequipped with slots of better than PC Express 2.0 x 8. Please note that the EL-2800-USB may notwork properly depending on the chipset used in the PC.