Dalsa 1M28-SA, User Manual

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1M28 and 1M75 User’s Manual PRELIMINARY 23
DALSA 03-32-00525-03
Clocking Signal Indicates
FVAL (high) Outputting valid frame
LVAL (high) Outputting valid line
DVAL (high) Valid data
STROBE (rising edge) Valid data
Digital Data
The 1M28 digitizes internally to 10 bits and outputs either all 10 bits or the most
significant 8 bits on the Camera Link connector. The 1M75 only outputs the most
significant 8 bits.
2.9 Timing
The cameras feature many possibilities for flexible timing. In free running mode, the
camera delivers, independently of external signals, data according to the timing settings
in the internal registers. In triggered mode, the camera starts integration after an external
trigger pulse. During integration and readout all further trigger pulses are ignored. The
maximum rate at which the camera accepts external triggers is defined by the frame
timer. The minimum exposure time, for any operating mode, is 560 ns.
Frame Timer
The frame timer is used to fix the frame rate of the camera in free running mode or to set
the maximum rate at which the camera accepts external triggers. In order to obtain the
maximum 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 is
to be increased by windowing. Note: The reset time is small, at 1-2µs.
Figure 10: External Trigger Mode, Constant Image Data Rate
Integration Readout
Frame Timer
Exsync
Ignored
Exsync
Integration
Reset
Figure 11: External Trigger Mode, Variable Image Data Rate
Integration Readout
Reset
Integration