10
4.6 Integration
The UM-300/UM-301 camera can be integrated up to 2 seconds without severe noise or dark current effect.
Make sure the camera is set to frame mode before preceding any integration; this will ensure that there will be a
full frame video (both odd and even field). To start integration, pin #11 of the 12-pin connector must be connected
to GND or 0V. The integrated video will be shifted out following the next vertical drive after pin #11 goes back to
high or 5V level, as shown in figure 11 below. If a frame grabber does not capture the immediate two fields or
integrated video, the normal video (before the integration) will display again on the monitor.
Figure 12. Integration Control Timing
4.7 Strobe
Set NRM/ASM switch to ASM mode and make sure the FRM/FLD switch on rear panel is set to FRM mode in
order to achieve full frame resolution. The strobe application is similar to high-speed shutter application except
the strobe pulse must occur in the dark and no shutter is required. The advantage to use strobe is that a full
frame resolution of video will be obtained. This will not happen when high-speed shutter is applied; a progressive
scan or full frame CCD camera must be utilized. The relationship between VINT and strobe pulse signal is shown
in figure 13 below. Make sure to fire strobe pulse between 1H and 8H, where 1H = 63.5
µ
sec, after the falling
edge of VINT. The camera outputs only two vertical sync pulses after reset to signify that the following fields are
valid. Therefore, the camera will not have any vertical sync or video if there is no reset pulse.
Figure 13. Strobe Timing
