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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

HD/VD input

• Continuous HD/VD input

100 µs to 250 ms

Trigger

Exposure time

External HD

External VD

(Continuous

VD)

T : T = Under 10 ms

Video out

WEN

1: This is a signal input from external equipment. The period of a continuous VD signal is prescribed as one

field. Both HD and VD signals must be input.

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 image is output when an external VD signal falls 10 ms or more after a trigger pulse rises (shown by 2

and 3 in the figure). If the time (T in the figure) between the falling edges of a trigger pulse and external

VD signal is under 10 ms, an image is output when the external VD signal or the next external VD signal

falls (as shown by 1 in the figure). (In this case, an image is output when the next external VD signal falls.)

An image and WEN signal are always output together. For more details, refer to the WEN signal.

Note

: An image is superimposed when the next exposure ends before the previous image is output.

External trigger shutter operation

Exposure time

T : T = 10 ms or more

250H (XC-ST50/30)

293H (XC-ST50CE/30CE)

Normal operation

1/3 s or more

Mode transition

External input

External trigger

inhibition area

shutter operation

(50 ms)

Exposure

time

T : T = 10 ms or