Sony XCST70 Manual del usuario - Página 23
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TIMING CHART OF EXTERNAL TRIGGER SHUTTER - MODE 1 (NON-RESET MODE)
For setting the shutter speed using DIP switch
HD/VD input
Continuous HD input and single VD input
External trigger shutter operation
1
1
*
Trigger
2
*
Exposure time
1
*
External HD
1
*
External VD
(Single VD)
4
*
T : T = 10 ms to 110 ms
Video out
WEN
1: This is a signal input from the outside. Be sure to input both HD and VD signals. Make the phase of the VD
*
signal coincide with the falling edge of the HD signal.
2: As shown in the table on page 7, exposure time Te is determined by the setting of a DIP switch.
*
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: Be sure to input an external VD signal for 10 ms to 110 ms from the rising edge of a trigger pulse (as shown
*
by 1 and 2 in the figure). For the input except described above, the operation cannot be ensured. If the
external VD signal is not input under the prescribed conditions, the normal operation is engaged several V
after a change in input operation under the prescribed conditions.
Note
: An image is superimposed when the next exposure ends before the previous image is output.
1/3 s
Te
1
250H (XC-ST70)
293H (XC-ST70CE)
Mode transition state
External input
inhibition area
3
*
Normal operation
(50 ms)
XC-ST70/70CE
External trigger
shutter operation
2
2
*
Exposure
time
Te
min. 10 ms
2
250H (XC-ST70)
293H (XC-ST70CE)
21