Sony XC-ST50 Technical Manual page 24

XC-ST50/50CE
XC-ST30/30CE
TIMING CHART OF EXTERNAL TRIGGER SHUTTER - MODE 1 (NON-RESET MODE)
For setting the shutter speed using DIP switch
No HD/VD input (Internal synchronization)
External trigger shutter operation
1
1
*
Trigger
100 us to 250 ms
2
*
Exposure time
4
*
Interrnal VD
5
*
T : T = Under 10 ms
Video out
WEN
1: This is a signal input from external equipment.
*
2: As shown in the table on page 7, exposure time Te is determined by the setting of a DIP switch.
*
3: Normal operation is engaged when the high period exceeds 1/3 sec. After that, 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 internal VD signal is output by setting the INT/EXT switch on the rear panel to INT.
*
5: An image is output when an internal VD signal falls 10 ms or more after a trigger pulse rises (as shown by
*
2 and 3 in the figure). If the time (T in the figure) between the falling edges of a trigger pulse and internal
VD signal is under 10 ms, an image is output when the internal VD signal or the next internal VD signal
falls (as shown by 1 in the figure). In this case, an image is output when the next internal VD signal falls.
An image and WEN signal are always output together. For more details, refer to the WEN signal. (The
falling edge of an internal VD signal is the same in phase as the beginning of an equalizing pulse in a
SYNC V area.)
Note
: An image is superimposed when the next exposure ends before the previous image is output.
22
2
2
*
Te Exposure time
5
*
T : T = 10 ms or more
1
250H (XC-ST50/30) 250H (XC-ST50/30)
293H (XC-ST50CE/30CE) 293H (XC-ST50CE/30CE)
3
*
Normal operation
1/3 s or more
Te
2
Mode transition
External input
External trigger
inhibition area
shutter operation
(50 ms)
3
2
*
Exposure
time Te
5
*
T : T = 10 ms or
more
3