JAI TM-6710 Operation External Synchronization, Asynchronous Reset with Shutter, Shutter Control

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Operation

3.3.2 External Synchronization
The TM-6710 can take external HD and VD for
phase locking. The internal PLL will take external	OUTSIDE	INSIDE CAMERA
HD and lock with the CCD HD. (The CCD HD	CAMERA
			1µF
frequency is half of the analog video output HD.)	Ext HD
	(or Ext VD)		C1
Example: Ext. HD = 30.49KHz, VD will be 120Hz		4.7k	R1
and Master Clock will be 50.98MHz.
	External Sync Input Schematic

The internal sync generator will take external VD to

generate internal VD. External VD frequency should be the same as the frame rate.

3.3.3Asynchronous Reset with Shutter

To activate the asynchronous reset mode, use the Mode control switch on the back panel of the camera (TM-6710). The asynchronous trigger input (VINIT) is applied to pin #6 of the 12-pin connector (TM- 6710) or pins #9 and #22 of the Camera Link connector (TM-6710CL).

The TM-6710’s asynchronous reset is flexible and takes external HD for phase

	locking. Applying a VINIT pulse resets the camera’s scanning and purging of					0	1
						9
	the CCD. When async reset pulse (VINIT) is applied to High state (+5V) with					8	2
	dial switch select from 1 to 9, the TM-6710’s asynchronous camera discharges					7	3
	the photo charges into the substrate drain although the camera is still running on					6	4
	its sync timing and only outputs captured video. When the negative going reset					5
	pulse is applied, the camera will latch the falling edge to its next horizontal					Shutter Control Switch
	drive and reset vertical sync timing immediately. Then it starts integrating for
	the period of shutter control set by either an external pulse width pulse or internal shutter control.
	Therefore the horizontal phase will not be interrupted. The TM-6710 asynchronous camera will output
	one frame of shuttered video after reset.
TABLE 1.	Shutter Control
		Set	Manual Mode		Async Reset Mode
		0	No Shutter (1/120)		No Shutter (1/120)
		1	1/250	128H	1/32,000	1.0H
		2	1/500	64H	1/16,000	2.0H
		3	1/1,000	32H	1/12,000	3.0H
		4	1/2,000	16H	1/8,000	4.0H
		5	1/4,000	8.0H	1/4,000	8.0H
		6	1/8,000	4.0H	1/2,000	16H
		7	1/12,000	3.0H	1/1,000	32H
		8	1/16,000	2.0H	1/500	64H
		9	1/32,000	1.0H	Shutter determined by pulse width

There are three modes to control the asynchronous reset and shutter speed:

•External Pulse Width Control Mode

TM-6710/6710CL High-Speed Progressive Scanning CCD Camera