TIMING CHART OF EXTERNAL TRIGGER SHUTTER - MODE 1
For setting the shutter speed using DIP switch
No HD/VD input (Internal synchronization)
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| External input | External trigger |
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| *3 Normal operation | inhibition area | |
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| External trigger shutter operation | (50 ms) | shutter operation | ||
| 1 | 2 |
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| 3 |
*1 | Trigger |
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| *3 Trigger |
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| *2 Exposure time Te | *2 Exposure time Te |
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| time Te |
*4 | Interrnal VD |
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| *5 T : T = Under 10 ms | *5 T : T = 10 ms or more |
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| *5 T : T = 10 ms or | |
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Video out | 1 | 2 |
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WEN |
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| 250H | 250H |
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| 293H | 293H |
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*1: *2: *3:
*4: *5:
This is a signal input from the outside.
As shown in the table on page 7, exposure time Te is determined by the setting of a DIP switch.
The normal operation state is engaged when the high period exceeds 1/3 sec. After that, the external trigger shutter operation is engaged when the trigger pulse goes “low”. In this case, the area between the falling edge of a trigger pulse and the subsequent 50 ms period is an external input inhibition area. During the trigger inhibit period, an input trigger may be missed.
An internal VD signal is output by setting the INT/EXT switch on the rear panel to INT.
An image is output when an internal VD signal falls 10 ms or more after a trigger pulse rises (as shown by
2and 3 in the figure). If the time (T in the figure) between the falling edges of a trigger pulse and internal VD signal is under 10 ms, an image is output when the internal VD signal or the nextinternal VD signal falls (as shown by 1 in the figure). In this case, an image is output when the next internal VD signal falls. An image and WEN signal are always output together. For more details, refer to the WEN signal. (The falling edge of an internal VD signal is the same in phase as the beginning of an equalizing pulse in a SYNC V area.)
Note : An image is superimposed when the next exposure ends before the previous image is output.
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