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Hi-Res. B/W camera instruction manual
ADC 660N and ADC 660P
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14
Monitor Screen LEVEL Control Direction
To increase the brightness Clockwise
To decrease the brightness Counterclockwise
12. Power Indicator LED
This LED turns ON only when power is supplied properly and the DC-DC converter
(or the regulator) inside the camera works properly.
13. Backfocus Adjustment Screw
This screw is used to position the CCD image sensor at the precise point of focus of the
lens.
Backfocusing Fixed-Focal or Vari-Focal Length Lenses
Install a lens and connect the camera to a monitor and power supply as
described in this manual.
Open the iris completely or just before there is blooming in the picture. If an
Auto Iris lens is used, reduce the room lighting to use a neutral density filter to
allow the lens to open completely. This gives the most accurate results.
Adjust the screw slowly until the sharpest picture is obtained. This completes the
adjustment. The back-focus adjustment screw is held in place by friction, so
there is no locking screw to tighten.
Backfocusing Zoom Lenses
Install a lens and connect the camera to a monitor and power supply.
Position the camera 10~30 feet (3~9 meters) from a flat vertical surface
suitable for focusing. A newspaper works well as a focusing target.
Open the iris completely or just before there is blooming in the picture. If an
Auto Iris lens is used, reduce the room lighting or use a neutral density filter to
allow the lens to open completely. This gives the most accurate results.
1. Zoom the lens in to the maximum telephoto setting. Adjust the optical
focus of the lens for the sharpest picture.
2. Zoom out to the maximum wide angle setting. If the picture is no longer in
focus, readjust the back-focus screw to obtain the best focus possible.
3. Repeat steps 1 and 2 until the image remains sharp through the entire
zoom range without having to make any focus adjustments.
This completes the adjustment. The back-focus adjustment screw is held in
place by friction, so there is no locking screw.