
8
XC-ST50/50CE
XC-ST30/30CE
ELECTRONIC SHUTTER
External trigger shutter
By inputting an external trigger, a high-speed moving subject can be caught at an exact position.
Set DIP switches 6, 7, and 8 on the rear panel to mode 1 or 2. (Refer to the table below.)
When the trigger pulse width is 1/3 sec or more, the output signal is switched to a normal video signal.
There are two modes for timing in which a video signal is obtained.
Mode 1 (Non-reset mode)
In this mode, a video signal synchronized with a VD signal is output after a trigger pulse is input.
A video signal is synchronized with the external VD signal when an external HD/VD signal is input.
A video signal is synchronized with an internal VD signal when no external HD/VD signal is input.
Mode 2 (Reset mode)
In this mode, a video signal is output from a trigger pulse after a certain period of time.
*
For more details of each timing chart, refer to pages 16 to 23.
Setting of external trigger shutter speed
There are two ways to set the shutter speed.
Using DIP switch on the rear panel
Using trigger pulse width
Set all of DIP switches 1 to 4 on the rear panel to 0.
An arbitrary shutter speed can be obtained by setting the trigger pulse width to the range of 2
μ
sec to 250
msec.
Exposure time = Trigger pulse width + 97
μ
sec (XC-ST50/ST30)
Switch
(Non-reset mode)
(Reset mode)
1
2
3
4
5
6
7
8
0: OFF
120
μ
sec (XC-ST50CE/ST30CE)
–
–
–
1
0
1
1
1
0
0
0
0
1
1
0
1
0
0
0
1
1
1
1
0
0
0
1
1
0
0
1
0
0
1
1
1
0
1
0
0
1
1
0
1
1
0
0
1
1
1
1
1
0
0
1
1
Mode 1 (Non-reset mode)
–
–
–
1
0
0
1
1
0
0
0
0
0
1
0
1
0
0
0
0
1
1
1
0
0
0
0
1
0
0
1
0
0
0
1
1
0
1
0
0
0
1
0
1
1
0
0
0
1
1
1
1
0
6
0
0
1
Switch
1
2
3
4
5
6
7
8
*
1/100
*
1/100
1/125
1/250
1/500
1/1000
1/2000
1/4000
**
1/10000
Frame: 0 / Field: 1
Mode 2 (Reset mode)
Switch
1
2
3
4
5
6
7
8
1/125
1/250
1/500
1/1000
1/2000
1/4000
**
1/10000
Frame: 0 / Field: 1
*
The external trigger shutter speed is set to
1/100 sec for XC-ST50/ST30(EIA) and 1/120
sec for XC-ST50CE/30CE(CCIR).
**
The external trigger shutter speed is set to
1/10000 sec for XC-ST50/ST30(EIA) and
1/8000 sec for XC-ST50CE/30CE(CCIR).
1: ON
0: OFF
–: Any
0
0
0
0
Frame: 0 / Field: 1
0
1
1
0
0
0
0
0
0
1
Mode 1
Mode 2
: 1. lt is recommended to set DIP switch 5 for field selection.
(The field selection is about two times in sensitivity as high as the frame selection.)
2. After a trigger pulse is input, a new trigger pulse must not be input before the video
signal obtained by the trigger pulse has been output.
1: ON
Note