User`s manual

Falcon XDR and HG Series Camera User's Manual DALSA
Serial Interface: How to Control the Camera 41
Mode 6: External Frame Rate, Fixed Exposure Time
In this mode, the frame rate is triggered externally with the falling edge of EXSYNC generating the rising
edge of a programmable exposure time. There is a 100μs delay between the trigger and the start of the
exposure. The minimum trigger (EXSYNC) pulse width is 1μs. The minimum exposure time is 40μs.
This mode supports both concurrent and non-concurrent operation. If the exposure time is greater than
the readout time, it will accept a trigger 1μs after the previous exposure is finished.
If the exposure time is less than the readout time, then the minimum delay between consecutive
exposure times is 150μs. Note that the exposure and readout time can overlap. However, if the camera is
still reading out the prior frame, and a trigger is asserted, it will extend the exposure time until an
EXSYNC is received after readout.
Mode 9: Sequential Smart EXSYNC, External Frame Rate and Exposure Time
In this mode, EXSYNC sets both the frame period and the exposure time. The rising edge of EXSYNC
marks the beginning of the exposure and the falling edge initiates readout. There is a 100μs delay
between the trigger and the start of the exposure. The minimum exposure time is 10μs. The minimum
delay between the end of readout and the next EXSYNC is 1μs.
Note: The exposure and readout time cannot overlap. In addition, the camera will ignore the
falling edge of EXSYNC if the prior frame’s integration or readout is not complete.