Sony XC-ST30 Техническое руководство - Страница 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
100 us to 250 ms
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 external equipment. Both HD and VD signals must be input. The phase of the
*
VD signal must 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 DIP switch setting.
*
3: Normal operation 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: An external VD signal for 10 ms to 110 ms must be input 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.
Note
: An image is superimposed when the next exposure ends before the previous image is output.
Te
1
250H
(XC-ST50/30)
293H
(XC-ST50CE/30CE)
Mode transition
External input
inhibition area
3
*
Normal operation
(50 ms)
1/3 s or more
XC-ST50/50CE
XC-ST30/30CE
External trigger
shutter operation
3
2
*
Exposure
time
Te
min. 10 ms
2
250H
(XC-ST50/30)
293H
(XC-ST50CE/30CE)
21