External Trigger Shutter - Sony XC-ST50 Technical Manual

XC-ST50/50CE
XC-ST30/30CE
ELECTRONIC SHUTTER

External trigger shutter

By inputting an external trigger, the image of a high-speed moving object can be captured in 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 camera switches to normal (continuous) video operation.
There are two modes for timing in which a video signal is obtained.
• Mode 1 (Non-reset mode)
In this mode, an output video signal is synchronized with the VD signal after the triggered exposure is
complete.
• An output video signal synchronized with the external VD signal when an external HD/VD signal is input.
• An output video signal 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 soon after exposure is complete.
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
Mode 1 (Non-reset mode)
Switch * 1/100 1/125
1 –
2 –
3 –
4
1
5
6 0
7 1
8
1
Mode 2 (Reset mode)
* 1/100 1/125
Switch
1 –
2 –
3 –
1
4
5
6 0
7 0
1
8
• Using trigger pulse width
• Set all 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 µsec to 250
•
msec.
Mode 1
Switch
(Non-reset mode)
0
1
0
2
3 0
0
4
5 Frame: 0 / Field: 1
0
6
1
7
8 1
8
1/250 1/500 1/1000
1 0 1 0
0 1 1 0
0 0 0 1
0 0 0 0
Frame: 0 / Field: 1
0 0 0 0
1 1 1 1
1 1 1 1
1/250 1/500 1/1000
1 0 1 0
0 1 1 0
0 0 0 1
0 0 0 0
Frame: 0 / Field: 1
0 0 0 0
0 0 0 0
1 1 1 1
Exposure time = Trigger pulse width + 97 µsec (XC-ST50/ST30)
Mode 2
(Reset mode)
0
0
Note
0
0
0
0
1: ON
1
0: OFF
1/2000 1/4000
**
1/10000
1 0 1
0 1 1
1 1 1
0 0 0
0 0 0
1 1 1
1 1 1
1/2000 1/4000
**
1/10000
1 0 1
0 1 1
1 1 1
0 0 0
6
0 0 0
0 0 0
1 1 1
: 1. lt is recommended to set DIP switch 5 for field selection.
(The field selection is about two times higher sensitivity than frame selection.)
2. After a trigger pulse is input, a new trigger pulse should not be input before the video
signal obtained by the trigger pulse has been output.
*
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
–: Either ON or OFF
120 µsec (XC-ST50CE/ST30CE)