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5.Asynchronous Reset and Asynchronous

Shutter

By supplying VINIT pulse on pin #6, the camera can be reset

asynchronously. In this mode, when VINIT is kept high, it keeps

discharging the CCD and outputs the field video signal upon

the negative going edge.The output stays continuous during

VINIT low.The first field output is always Odd.

Async Shutter with External Shutter Timing control

6. Reset-Restart Mode

Rather than using VINIT as async reset, the camera can be

reset using EXT.VD. In this mode, camera needs multiple VD

pulses to output valid images depending on whether it is set

to Field or Frame mode. Usually, the first field (field mode) or

first frame (frame mode) are garbage because of previous sig-

nal residuals prior to reset.A frame grabber has to know

which frame or field to capture. External HD must be applied

for this operation.

7. Reset-Restart with Electronic Shutter

The shutter speed or exposure can be controlled with

external pulse width control in this mode. In combination with

Reset-restart pulse (EXT.VD), the camera can be externally

controlled for the image-capture timing as well as the expo-

sure time.

This is an excellent application for capturing multiple images

(two fields of images) of indexing objects under various light-

ing or brightness conditions.When Frame mode is selected,

the full vertical resolution is achieved even using an electronic

shutter by taking two fields of shutter images.

8. Integration Mode

When integration control is low, the CCD imager keeps

integrating and when the signal returns to high, it enables the

charge transfer for video output.This mode integrates longer

than one field and with strobe light application, it can capture

randomly strobed images during the integration. It also

increases the exposure time to enhance low light viewing.

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TM-250/260 High-Resolution CCD Camera

12P-02S Interface Cable (optional)

Pin# Lead Color Function Pin Configuration

1 Gray GND

2 Yellow +12VDC

3 Red coax shield GND

4 Red coax Video

5 Orange coax shield GND

6 Orange coax VINIT

7 Black coax VD Input

8 White coax shield GND

9 White coax HD Input

10 Brown N/C

11 Blue N/C

12 Black coax shield GND

Shutter

Video

Async

VINIT

Normal

Async

Async field is Odd field

Ext. HD for PLL (External Sync)

Even

Field

Odd

Field

Even

Field

Odd

Field

Even

Field

Odd

Field

Even

Field

Odd

Field

Even

Field

Odd

Field

Even

Field

Odd

Field

Even

Field

Odd

Field

Even

Field

Odd

Field

Even

Field

Odd

Field

Even

Field

Odd

Field

Even

Field

Odd

Field

Odd

Field

Even

Field

Even

Field

Odd

Field

Odd

Field

Even

Field

Even

Field

Odd

Field

11 12

Frame Mode

Video

Reset-Restart

Shutter

Control

Exposure Exposure

EXT. HD for PLL(Relationship with HD and Reset-Restart VD affects Odd or Even field output)

Invalid Image Invalid ImageGood Images

One frame

Good Images

One frame

Even

Field

Odd

Field

Even

Field

Odd

Field

Even

Field

Odd

Field

Even

Field

Odd

Field

Even

Field

Odd

Field

Field Mode

Video

Frame Mode

Video

Field Mode VD

(Min. 2 pulses)

Frame Mode VD

(Min. 4 pulses)

EXT. HD for PLL (Relationship with HD and Reset-Restart VD effects Odd or Even field output)

Invalid image Invalid image

Invalid images

Good image

(one field only)

Good image

Good images

(one full frame)

Field Images

(alternate different fields)

Odd

Field

Even

Field

Odd

Field

Odd

Field

Even

Field

Even

Field

Even

Field

Odd

Field

Even

Field

Odd

Field

VD (internal

/external)

Discharge

Async trigger

Transfer gate

CCD clocking

Video output

Shutter

11H

When transfer gate pulse is before 11H fromVD,

the image is output in the same field

TG pulse moves based on the shutter speed

CCD clocking starts at 9H from next VD

1 2 3 4 5 6

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