CV-A11
6.8. Long Time Exposure Mode
The exposure time is the interval between 2 ext. VD pulses sent to the VD input of the camera (Pin No. 7 of the
To use this mode: |
|
|
Set function: | Trigger mode to “Long Time exposure” | TR=4 |
| Polarity and other functions |
|
Input: | Ext. trigger to pin 5 on 6 pin connector (or 11 on 12 pin connector) | |
| Ext. VD to pin 7 on 12 pin connector. |
|
| Ext. HD to pin 6 on 12 pin connector. |
|
Fig. 20. Long time exposure.
Important notes on using this mode:-
•Exposure time range is 1/30 sec. to ∞. However, it is recommended not to use exposure over 2.0 sec. This is because visible dark current noise may appear on the video signal due to the long time exposure of the CCD image sensor.
•External sync system should follow the camera scanning system.
•Ext. HD signal (TTL 2.0~5.0V) has to be input continuously.
•See Fig. 11 for the phase relationship between ext. HD and ext. VD pulses
•The EEN pulse is not provided when using this mode.
- 12 -