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Everything Seems to be Working, But No Image
Remove the cover from your PC and reset all the cards into the mother board. Sometimes
when you move your PC, cards inside the PC work themselves loose. Don’t forget to check
for optical path obscuration also.
Data Clocking/Output Signals
Verify the presence of all data clocking and output signals at the connector pins on the
camera housing. This is easily done by disconnecting the J7/J8 data cables and probing
the connector pins with an oscilloscope. Remember, the camera will free-run at the
maximum scan rate even with no frame grabber connected. This makes diagnosing
connection problems quick and easy!
Horizontal Lines or Patterns in Output
To eliminate this type of problem use a DC light source. Also verify that data cables and
ground shields are in-place and connected. Inferior cables do result in degraded image
transfer fidelity.
No Output or Non Specification Output
If your camera has no output or is putting out an unspecified signal unkown to you, check
the length of your cable. If it is unnecessarily too long and not shielded, your cable most
likely is picking up radiated noise and is inputting the noise into your image acquisition
system.
Vertical Patterns in Output
Sometimes you might see patterns in your output. Most likely these are caused by dirt on
your lens or possibly contaminants on the sensor window. Clean both to remove all
contaminants. Some vertical patterns can also be caused by improperly wired or shielded
data cables also.
Images Are Too Bright or Too Dark
The causes to this problem should be obvious, but many times are overlooked. If your
captured image is too dark or light, then experiment with the lens aperture. Sometimes if
you lengthen or shorten the Line Rate Period (ExSync) time this will affect your image.
Don’t forget to check your lighting!
Images Look Noisy
There are several things that can cause this condition. Try increasing and decreasing pixel
gain until you find the right setting. Look for an increase in dark current. If the ambient
temp. increases this will cause noise in the image.
Fairchild Imaging • CAM/CCD-2KLV.TDI & CAM/CCD-4KLV.TDI Line Scan Camera User’s Manual • Rev 073004 • 33 of 38