JVC LST0450-001B Instructions Manual page 11

Others
This camera comes with a built-in AGC circuit. The sensitivity increases
automatically at a dark place and the screen may appear grainy. This is not
a malfunction.
While the AGC is activated, if a transceiver which causes strong
electromagnetic wave is used near the camera, the picture may suffer from
beat.
Please use the camera more than five meters from such transceivers.
You may hear some noise during power on and when the screen is
switched between the color and the black and white mode, because of the
movement of the optical filter switching motor. Also, the image will be
somewhat distorted.
The beat may sometimes appear on the screen if gain is raised when the
line lock is in use, but the phenomenon takes place due to the fluctuation of
power frequency and is not a malfunction.
When this camera is used in the White Balance ATW (automatic tracking)
mode, the color tone may differ slightly from the actual color due to the
principle of the automatic tracking white balance circuit. This is not a
malfunction.
If a high brightness object (such as a lamp) is shot, the image on the
screen may have white vertical tailings. This is a characteristic of the CCD
known as the smear phenomenon and is not a malfunction.
When a high brightness object is shot, sometimes undulations can be
observed on the vertical lines of the object. However, this phenomenon is
peculiar to the camera and is not a malfunction.
Caution for operating the VIDEO IRIS lens
If the LEVEL dial of the VIDEO IRIS lens is set to a low level (L position), a
malfunction - such as the hunting phenomenon where the iris opens and
closes involuntarily - can occur. In such a case, first set the LEVEL dial on
the lens to the H position, and then adjust it to an optimum level while
checking the video signal.
The cable stopper on the terminal block can come off sometimes.
Therefore, be sure to take enough time and fix the cable securely.
This camera achieves optical performance by using specified lens (1/3
inch size) conformed to CCD size. However, some general lens may not
meet this specification (effective image circle is small or optic displacement
is big). When such lens are used, negative effects such as shading may
occur.
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