Sony XCST70 Посібник користувача - Сторінка 25

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Sony XCST70 Посібник користувача

TIMING CHART OF EXTERNAL TRIGGER SHUTTER - MODE 2

For setting the shutter speed using TRG width
External trigger shutter operation
1
1
*
Trigger
2
*
Exposure time
Video out
1
4
*
1H to 2H
WEN
250H (XC-ST70)
293H (XC-ST70CE)
1: This is a signal input from the outside. The trigger interval should be trigger pulse width + 1 field + 2H
*
period or more. The trigger interval shorter than described above cannot be ensured. If a trigger pulse is
not input under the prescribed conditions, the normal operation is ensured several V after a change in
input operation under the prescribed conditions.
2: Exposure time Te
*
(The trigger width should be between 2 s and 1/4 s)
3: 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.
4: A VD signal is generated 1H to 2H after a trigger pulse falls, and an image is output in synchronization with
*
the VD signal.
5: When the external trigger shutter mode changes into the normal operation mode, a WEN signal is output.
*
Te
250H (XC-ST70)
293H (XC-ST70CE)
Te = Trigger width + 97 s (XC-ST70), Te = Trigger width + 120 s (XC-ST70CE)
(RESET MODE)
Mode transition state
External input
inhibition area
3
*
Normal operation
1/3 s or more
XC-ST70/70CE
External trigger
shutter operation
(50 ms)
2
2
*
Exposure
time
Te
2
4
*
1H to 2H
250H (XC-ST70)
293H (XC-ST70CE)
23