JAI CV-A33CL Pulse Width Control Mode, Vertical timing for pulse width control min. exposure

CV-A33CL

6.4.3. Pulse Width Control Mode

The exposure will start 28 ∝sec. after the trigger leading edge, and it stops and is read out at the trigger trailing edge. This mode will operate with full window or windows of interest scanning.

An EEN pulse will indicate the active accumulation time, and a FVAL pulse indicates that the resulting video is read out.

To use this mode:
Set function:	Trigger mode “Pulse Width Control”	TR=2
	“Windows” “Full” or “Windows scan”	WS=0, WS=1
	Polarity and other functions
Input:	Ext. trigger to Camera Link or pin 10 on 12-pin connector.

Important notes on using this mode.

•The duration of the trigger should be >1 LVAL to <237 FVAL. (>16.8 ∝sec. to <2.0sec.) The image quality can be reduced at maximum pulse width.

•A new trigger can be applied before FVAL is low as long as the exposure will be on for longer than the FVAL high period. Refer to 6.2.4

For timing refer to 6.2.2. and 6.2.3. Fig. 14. and fig 15.

For windows scan timing refer to 6.2.5 and fig.17 through fig.19.

For LVAL a-synchronous accumulation refer to 6.2.4 and fig 16.

1 LVAL = 16.825∝s

TRG

1 FVAL per iod

2L	502L
	498L

FVAL

LVAL

27 .6 μS

Exposure per iod

EEN

		E f fec t ive L ines
			493L
DATAOUT	0 1 2 3 4 ……		……

DVAL

2L

5L

4 8 8 4 8 9 4 9 0 4 9 1 4 9 2

Fig. 22. Vertical timing for pulse width control min. exposure

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