JAI CV-A33CL operation manual Auto trigger Mode, Vertical timing for auto trigger function

CV-A33CL

6.4.4. Auto trigger Mode

The auto trigger function, TR=3 can be used as sensing device inside the camera field of view. It sense in a programmable window from top of the image. The continuous output is sent to the frame grabber, which PC should be programmed to sense if an object is passing the window. The horizontal position and the signal threshold could be the programmed parameters. If an object passing is detected, a trigger is send to the camera. The resulting image, a full frame or windows scan, (depending of windows scan setting), is read out to the grabber, and the auto trigger function with fast scan of the programmed window will start again.

To use this mode:
Set function:	Trigger mode “Auto Trigger Mode”	TR=3
	“Auto Trigger”	AT=3 through 493
	“Windows” “Full” or “windows scan”	WS=0, WS=1
	Polarity and other functions
PC and grabber:	Detect trigger conditions
	Send a pulse width control trigger to the camera.
Input:	Ext. trigger to Camera Link or pin #10 on 12-pin connector.

Important notes on using this mode.

•The exposure is equal the programmable parameter AT.

•The exposure time is the same for the auto trigger partial scanned frame and the resulting triggered frame read out.

•The duration of the trigger should be >1 LVAL to < 1 FVAL. (>16.8 ∝sec. to <8.3 msec.)

•Refer to 6.1.7. Auto Trigger Window of Interest.

•Max auto trigger frame rate is 5403 fps.

1 FVAL per iod

11L

TRG

FVAL

LVAL

Exposure per iod

EEN	E ffec t ive P ixe ls
	3L	4L	4L
DATAOUT	0 1 2		0 1 2

DVAL

0 1 2 0 1 2 3 4

When Trgger is inpu t.
	1 LVAL = 16.825∝s
1 FVAL per iod
502L

E ffec t ive L ines

493L											5L	4L
8		9			0			1 2				0 1 2	0 1 2	0 1 2
8	8			9			9			9
4 4			4			4			4

Fig. 23. Vertical timing for auto trigger function

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