TIMING CHART OF EXTERNAL TRIGGER SHUTTER - MODE 1
For setting the shutter speed using TRG width
No HD/VD input (Internal synchronization)
|
|
|
|
|
|
| Mode transition state |
|
|
|
|
|
|
|
|
|
| External input | External trigger |
| |
|
|
|
|
|
| *3 Normal operation | inhibition area |
| ||
|
| External trigger shutter operation | (50 ms) | shutter operation | ||||||
| 1 | 2 |
|
|
|
|
| 3 |
|
|
*1 | Trigger |
|
|
|
| *3 Trigger |
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
| *2 Exposure time Te | *2 Exposure time Te |
|
|
| *2 Exposure | |||
|
|
|
|
|
|
|
|
| time Te |
|
*4 | Interrnal VD |
|
|
|
|
|
|
|
|
|
|
|
| * | 5 | ∝ |
| * | 5 | T : T = Under 10 | ∝s |
|
|
|
| T : T = 10 s or more |
|
| ||||
Video out | 1 |
| 2 |
|
|
|
| 3 |
| |
WEN |
|
|
|
| *6 |
|
|
|
| |
|
|
|
|
|
|
|
|
| ||
|
| 250H |
|
|
|
|
| |||
|
| 293H |
|
|
|
|
| |||
*1: *2:
*3:
*4: *5:
*6:
This is a signal input from the outside.
Exposure time Te Te = Trigger width + 97 μs
Te = Trigger width + 120 μs
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.
During external trigger shutter operation, an image is output when an internal VD signal falls after a trigger pulse falls (as shown by 1 and 2 in the figure). However, if the time (T in the figure) between the falling edges of a trigger pulse and internal VD signal is under 10 μs, an image is output when the internal VD signal or the next internal VD signal falls (as shown by 3 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.)
When the external trigger shutter mode changes into the normal operation mode, one WEN signal is output.
Note : An image is superimposed when the next exposure ends before the previous image is output.
24
