Dalsa 1M75-SA User Manual

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Dalsa 1M75-SA User Manual Manual pdf 23 page image

1M28 and 1M75 User’s Manual PRELIMINARY 23DALSA 03-32-00525-03Clocking Signal IndicatesFVAL (high) Outputting valid frameLVAL (high) Outputting valid lineDVAL (high) Valid dataSTROBE (rising edge) Valid dataDigital DataThe 1M28 digitizes internally to 10 bits and outputs either all 10 bits or the mostsignificant 8 bits on the Camera Link connector. The 1M75 only outputs the mostsignificant 8 bits.2.9 TimingThe cameras feature many possibilities for flexible timing. In free running mode, thecamera delivers, independently of external signals, data according to the timing settingsin the internal registers. In triggered mode, the camera starts integration after an externaltrigger pulse. During integration and readout all further trigger pulses are ignored. Themaximum rate at which the camera accepts external triggers is defined by the frametimer. The minimum exposure time, for any operating mode, is 560 ns.Frame TimerThe frame timer is used to fix the frame rate of the camera in free running mode or to setthe maximum rate at which the camera accepts external triggers. In order to obtain themaximum frame rate, the frame timer must be set as close to the sum of the readout time,exposure time, and reset time as possible. This is especially important if the frame rate isto be increased by windowing. Note: The reset time is small, at 1-2μs.Figure 10: External Trigger Mode, Constant Image Data RateIntegration ReadoutFrame TimerExsyncIgnoredExsyncIntegrationResetFigure 11: External Trigger Mode, Variable Image Data RateIntegration Readout Reset Integration