EXSync
Exsync must toggle (200 Hz min.). The camera will not output lines if ExSync is restricted to logic HIGH or logic LOW. Using an oscilloscope, check the camera end of the control signal cable to verify that ExSync toggles.
Offset Variation or Drifts
The camera will experience offset drift and the dark level will increase if the camera’s EXSYNC signal stops or is below 200 Hz. The camera is meant to be run with a continuous EXSYNC frequency. EXSYNC should pulse to logic HIGH to start the readout of each line, return to logic LOW, and stay LOW until after line readout and clamping
Noisy Output
Check your power supply voltage outputs for noise. Noise present on these lines can result in poor video
Quality. Low quality or
Verify that your acquisition system samples data on the rising edge of STROBE.
Horizontal Lines or Patterns in Output
Patterns can be caused by
No Output or Erratic Behavior
If your camera provides no output or behaves erratically, it may be picking up random noise from long cables acting as antennae. Where possible, connect unused pins to known logic levels. Do not attach wires to unused pins. Verify that the camera is not receiving spurious inputs.
Vertical Patterns in Output
If dark columns or vertical patterns appear in your output, the optical path may be contaminated. Clean your lenses and sensor windows with extreme care.
Images are too bright or too dark
Make sure that the lens cap has been removed.
Check the lens aperture. If the images are too dark, try opening the aperture. Try closing the aperture if they are too bright.
Fairchild Imaging • CAM/CCD 2KCL.TDI &
