Dalsa Genie Color C640, Руководство пользователя

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Genie Color Series-GigE Vision Camera Operational Reference
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45
External Trigger Programmable Exposure
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Also known as “Edge Pre-select” exposure. See the timing diagram below.
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The external trigger edge initiates the exposure process. The active external trigger edge can be selected as
either the low-high or high-low transition.
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The delay from active trigger edge to start of exposure is programmable from 1 μ s to 16 seconds (1 μ s steps) .
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Exposure duration is programmable from the sensor minimum (see Genie Sensor Overview) to 16 seconds (1 μ s
steps).
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Supports " Synchronous Mode " on page 48 timing for fastest possible frame rates. Start of exposure is aligned
on the next horizontal line while exposure duration granularity is 1µs. Exposure and sensor readout can be
concurrent.
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Supports " Reset Mode " on page 49 timing. Exposure granularity is 1µs. Exposure and sensor readout must be
sequential, limiting the maximal frame rate.
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Any external trigger received before the previous exposure is complete is ignored. An application can elect to
receive messages about ignored triggers. See
" Events " on page 69 .
Programmable Synchronous Mode Exposure Timing
Programmable Reset Mode Exposure Timing