Hitachi HV-D30 operation manual Ext trigger, Mode MODE1, CCD Mode FLD



13. Ext trigger

The external trigger function is used with a frame grabber to obtain an image of an object at a desired exposure time. Settings can provide images at various timings. The exposure time can be controlled by the external trigger pulse width.

1) Trigger mode : Selects external trigger mode Mode 1: Use for exposure time less than 2 fields.

Mode 2: Use for exposure time greater than 2 fields.

Note: Longer integration time tends to show increased noise and flaws in the CCD.

2) Delay time : Time from end of trigger pulse to camera sync reset

Setting range is 2 to 20 H. Can be used with a strobe light source to provide an optimum image with a frame grabber.

3)Trig polarity : Selects positive or negative trigger pulse polarity.

4)WE polarity : Selects WE pulse polarity

Selects pulse (WE) output synchronized to image obtained from the camera rear panel multi connector for 1 field or 1 frame. Use to match the interface of an external frame grabber or other equipment.

The trigger and CCD mode timing can be combined to obtain image timing as indicated in the figures.



a) MODE: MODE1, CCD MODE: FLD

					more than 64	s
				more than 2 fields			TRIGGER POLARITY:
									POSITEVE
External trigger pulse
							TRIGGER POLARITY:
									NEGATEVE
Exposure time
Video signal output
			ODD		EVEN		ODD	EVEN
	W E POLARITY:			SYNC reset			SYNC reset
		POSITEVE
W E pulse output
	W E POLARITY:
		NEGATEVE				











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