Operating Modes (Continued)
➎ 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 contin-
uously discharges the CCD and outputs the field video signal
upon the negative going edge.The output stays continuous dur-
ing VINIT low.The first field output is always Odd.
The following four asynchronous shutter modes are available:
• Strobe Asynchronous Shutter Mode
• Pre-Reset Asynchronous Shutter Mode
• Post-Reset Asynchronous Shutter Mode
• Pulse Width Asynchronous Shutter Mode
Please contact PULNiX for timing charts of various asyn-
chronous shutter modes.
➏ Reset-Restart Mode
Rather than using VINIT as async reset, the camera can be
reset using EXT.VD. In this mode, the 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) is 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.
➐ Reset-Restart with Electronic Shutter
The shutter speed or exposure can be controlled with exter-
nal pulse width control or external pulse position 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 exposure time.
This is an excellent application for capturing multiple images
(two fields of images) of indexing objects under various lighting
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.
➑ Integration Mode
When integration control is low, the CCD imager keeps inte-
grating 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 increas-
es the exposure time to enhance low light viewing.
TM-250/260 High-Resolution CCD Camera
12P-02S Interface Cable (optional)
Pin# Lead Color Function Pin Configuration
1 Gray GND
2 Yellow +12V DC
3 Red coax shield GND
4 Red coax Video
5 Orange coax shield GND
6 Orange coax VINIT/TRIG*
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
* VINIT is active low.
TRIG is active high.
EXT. HD for PLL(Relationship with HD and Reset-Restart VD affects Odd or Even field output)
(Min. 2 pulses)
(Min. 4 pulses)
EXT. HD for PLL (Relationship with HD and Reset-Restart VD affects Odd or Even field output)
(116 Seiten)
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