Faber M640 用户手册

44  •  Operational Reference 

•  Also known as “Edge Pre-select” exposure. See the timing diagram below.  
•  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.  

•  The delay from active trigger edge to start of exposure is programmable from 1μs to 4 seconds (1μs steps) .  
•  Exposure duration is programmable from 100μs to 4 seconds (1μs steps).  
•  Supports 

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 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. 

•  Supports 

 timing. Exposure granularity is 1µs. Exposure and sensor readout must be 

sequential, limiting the maximal frame rate. 

•  Any external trigger received before the previous exposure is complete is ignored. An application can elect to 

receive messages about ignored triggers. See 

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