Sony XC-ST50 Technical Manual page 20

XC-ST50/50CE
XC-ST30/30CE
TIMING CHART OF EXTERNAL TRIGGER SHUTTER - MODE 1 (NON-RESET MODE)
For setting the shutter speed using TRG width
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 µs to 100 ms
*
Video out
WEN
1: This is a signal input from external equipment. Be sure to input both HD and VD signals in this case. The
*
phase of the VD signal must coincide with the falling edge of the HD signal during input operation.
2: Exposure time Te
*
(The trigger width should be between 2 µs and 1/4 s)
3: The normal operation state is engaged when the trigger 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 trigger input inhibition area.
During the trigger inhibit period, an input trigger may be missed.
4: An external VD signal must be input between 10 µs and 100 ms from the falling 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.
5: When the external trigger shutter mode changes to normal operation mode, one WEN signal is output.
*
Note
: An image is superimposed when the next exposure ends before the previous image is output.
18
Te
1
250H 250H
(XC-ST50/ST30) (XC-ST50/ST30)
293H 293H
(XC-ST50CE/ST30CE) (XC-ST50CE/ST30CE)
Te = Trigger width + 97 µs (XC-ST50/ST30)
Te = Trigger width + 120 µs (XC-ST50CE/ST30CE)
3
*
Normal operation
1/3 s or more
5
*
Mode transition
External input
External trigger
inhibition area
shutter operation
(50 ms)
3
2
*
Exposure
time Te
min 10 µs
3
250H
(XC-ST50/ST30)
293H
(XC-ST50CE/ST30CE)