JAI CV-M300 Ccir Non-interlaced / Field accumulation mode, Pulse Width Control Mode

CV-M300

CCIR (Non-interlaced / Field accumulation mode)

Edge pre-select mode (for non-interlace only)					CCIR : 1H = 64∝ s
TRIG					1H	TRIG in
>1H
EXT HD
INT HD
INT VD
1.5H	7.5H			7.5H	6.5H	1.5H	7.5H
EEN
Exposure time		16.5H			Exposure time		0.5H
0.5H
WEN	9H	7.5H	10H		14H
CCD out				Effective pixels
				No.10 to 251
Video out		25H		287H	25H
		Blanking		Effective video	Blanking

6.3.2. Pulse Width Control Mode

The pulse width control mode will only work in non-interlaced field accumulation mode.

The exposure is controlled by the low period of the ext. trigger pulse. The CV-M300 starts the exposure at the first HD pulse after the falling edge of the ext. trigger pulse. The exposure ends at the first HD pulse after the rising edge of the ext. trigger. The Shutter can be controlled to be within the range from >1H (>64 usec.) to <60 msec. The AC coupling causes the upper limit.

EEN (Exposure ENable) pulse and WEN (Write ENable) pulses are generated and output from the camera.

The EEN pulse indicates the exposure time. The EEN pulse is output from pin 2 of the 6-pin multi connector. The signal level is 4.0 Vp-p from a 75 Ohm source.

The WEN pulse indicates the time period of the effective video signal output and is useful for the timing and interfacing of external devices such as frame grabbers. The WEN pulse is output from pin 6 of the 6- pin multi connector. The signal level is 4.0 Vp-p from a 75 Ohm source

The video must be read out before a new trigger can be applied. The interval between trigger pulses must be longer than the time for 1 field + the shutter time. It is the limit for the field rate.

To use this mode

Set:	SW1-1, 2 and 3 to OFF
	SW1-4 to ON for ext. trigger shutter
	SW1-5 to OFF for field accumulation
	SW1-6 to ON for non-interlaced
	JP14 on PK8042 to OPEN
Input:	Ext. trigger to pin 5 on 6-pin multi connector.
	Ext. HD to pin 6 on 12-pin multi connector. (If used).
	75 Ohm termination is done with SW2-1 (HD) on PK8041 board.

Refer to Timing Chart and Cautions on next page.

Detailed switch and jumper setting is described in “7. Mode Setting”.

For connections see “5. Pin Assignment”.

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