8

XC-ST50/50CE

XC-ST30/30CE

ELECTRONIC SHUTTER

External trigger shutter

By inputting an external trigger, a high-speed moving subject can be caught at an exact position.

Set DIP switches 6, 7, and 8 on the rear panel to mode 1 or 2. (Refer to the table below.)

When the trigger pulse width is 1/3 sec or more, the output signal is switched to a normal video signal.

There are two modes for timing in which a video signal is obtained.

• Mode 1 (Non-reset mode)

In this mode, a video signal synchronized with a VD signal is output after a trigger pulse is input.

•

A video signal is synchronized with the external VD signal when an external HD/VD signal is input.

•

A video signal is synchronized with an internal VD signal when no external HD/VD signal is input.

• Mode 2 (Reset mode)

In this mode, a video signal is output from a trigger pulse after a certain period of time.

*

For more details of each timing chart, refer to pages 16 to 23.

Setting of external trigger shutter speed

There are two ways to set the shutter speed.

• Using DIP switch on the rear panel

• Using trigger pulse width

Set all of DIP switches 1 to 4 on the rear panel to 0.

•

An arbitrary shutter speed can be obtained by setting the trigger pulse width to the range of 2

µsec to 250

msec.

Exposure time = Trigger pulse width + 97

µsec (XC-ST50/ST30)

120

µsec (XC-ST50CE/ST30CE)

–

–

–

1

0

1

1

1

0

0

0

0

1

1

0

1

0

0

0

1

1

1

1

0

0

0

1

1

0

0

1

0

0

1

1

1

0

1

0

0

1

1

0

1

1

0

0

1

1

1

1

1

0

0

1

1

Mode 1 (Non-reset mode)

–

–

–

1

0

0

1

1

0

0

0

0

0

1

0

1

0

0

0

0

1

1

1

0

0

0

0

1

0

0

1

0

0

0

1

1

0

1

0

0

0

1

0

1

1

0

0

0

1

1

1

1

0

6

0

0

1

Switch

1

2

3

4

5

6

7

8

1/125

1/250

1/500

1/1000

1/2000

1/4000

Frame: 0 / Field: 1

Mode 2 (Reset mode)

Switch

1

2

3

4

5

6

7

8

1/125

1/250

1/500

1/1000

1/2000

1/4000

Frame: 0 / Field: 1

1/100 sec for XC-ST50/ST30(EIA) and 1/120

sec for XC-ST50CE/30CE(CCIR).

1/10000 sec for XC-ST50/ST30(EIA) and

1/8000 sec for XC-ST50CE/30CE(CCIR).

1: ON

0: OFF

–: Any

0

0

0

0

0

1

1

0

0

0

0

0

0

1

Switch

Mode 1

(Non-reset mode)

Mode 2

(Reset mode)

1

2

3

4

5

6

7

8

Frame: 0 / Field: 1

: 1. lt is recommended to set DIP switch 5 for field selection.

(The field selection is about two times in sensitivity as high as the frame selection.)

2. After a trigger pulse is input, a new trigger pulse must not be input before the video

signal obtained by the trigger pulse has been output.

1: ON

0: OFF

Note