SVS-Vistek CameraLink svs11002, Руководство пользователя

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Users Manual Area Scan Cameras svs11002 and svs16000 Page 39
Appendix B – Basic timing for different operation modes
Notes:
The fundamental signals are PVAL (STROBE), LVAL and FVAL
, and in case of triggered modes,
Exsync.
Mode 0: Free running using RS 232 Interface
A frame is readout automatically and the data are valid indicated by LVAL per line and FVAL by
frame. The data is valid at the rising edge of PVAL (Strobe). The frame rate is about 13 fps and
there is no need to trigger the camera in order to get data. The enclosed software allows the user
to set exposure time from 60 µsec 60 msec. The time set stays resident after power off if the
configuration is saved to EEPROM.
Mode 1: External Trigger and Pulsewidth of EXSYNC
In this mode the camera is waiting for an external trigger which starts integration and read out.
Exposure time can be varied using the length of the EXSYNC pulse (i.e. between the high going
edge and the low going edge). The time settings in the control software are not activated. This
mode is useful in applications where the light level of the sceen changes during operation and
the framegrabber can provide such a signal. Change of exposure time is possible from one frame
to the next.
Mode 2: External trigger and RS 232 Interface
The frane rate is determined by the number of EXSYNC pulses per time unit. With each positive
transition (going high) the camera will readout a frame. Exposuretime is set in the same way as in
the free running mode but with an exposure range from 60 µsec to 4,3 sec.
Exposure time can be changed online during operation. No frame is distorted during switching
time. The time set stays resident after power off, if the configuration is saved to EEPROM.
Data
Exposure
time
EXSYNC
Data
Exposure
time
Data
Exposure
time
EXSYNC