Redlake MASD MegaPlus 4.2i, Руководство пользователя

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Mega Plus
®
Model 4.2i
4.9 Timing Waveforms
4.9.1 Exposure Timing
The start and stop of exposure time are synchronized with the falling edge of LINE ENA (+). The
exposure time interval, whether generated internally or externally, is sampled at the falling edge
of LINE ENA (+). Any start or stop exposure command occurring less than 250 nanoseconds
before the falling edge of LINE ENA (+) may go undetected. This means that the camera will not
respond to the start or stop command until another line has been processed.
All exposure events are quantized in steps of one line time or 236.8 µsec. This normally has no
effect on exposure because one or two line times (0.2 to 0.4 ms) is a small percentage of the total
10 to 500 millisecond exposure time.
NOTE : The EXPOSE input pulse must be wide enough to be seen by at least one horizontal
SYNC, which occurs once every 236.8 µsec. A pulse width of less than 236.8 µsec may
be missed.
Figure 4-9. Exposure Timing Waveform
91000058-003 Revision A 4-11 USER’S MANUAL