Condensation; Characteristic Ccd Phenomena - JVC GY- HD101 Instruction Manual

Condensation

• If the unit has been cooled down in a cold place and is then
carried to a warm place, the moisture contained in the
warm air may adhere to the head drum or tape guides and
be cooled into water droplets. This phenomenon is referred
to as condensation (dewing). When this occurs, the head
drum and tape guides are covered with droplets allowing
the tape to be stuck to them, leading to tape damage.
• Condensation occurs in the following cases:
• When the unit is suddenly moved
from a cold place to a warm place.
• When a room heater has just
started or when the unit is exposed
directly to cold air from an air con-
ditioner.
• When the unit is placed in a very
humid place.
Do not leave the videocassette inserted when moving the
camera under conditions where the temperature environ-
ment changes.
After moving the unit, do not use until the internal parts have
stabilized.
• "CONDENSATION ON DRUM" is displayed on the LCD
monitor and in the viewfinder when condensation occurs in
this unit.
Keep the power on until the warning message disappears.
• Pay attention to condensation even before the condensa-
tion indication appears.
As condensation forms gradually, the condensation indica-
tion may not appear for the first 10-15 minutes after con-
densation has formed inside.
In an extremely cold place, the condensation could freeze
and turn into frost. In such a case, it takes an additional 2-3
hours for the frost to first melt into condensation and then
to be dissolved.
• To prevent condensation
When moving the unit from one place to another where the
temperatures are greatly deferent, first remove the video-
cassette, place the unit in a tightly sealed vinyl bag, and
then move it to a new environment.
To ensure no condensation occurs, allow the temperature
of the unit in the bag to reach that of the new environment
before using it.

Characteristic CCD Phenomena

Smear and Blooming
Due to the physical structure of a CCD it is possible to induce
vertical streaking (called "smear") when shooting an
extremely bright light source. Another effect is the expansion
of light around a bright light or object (called "blooming").
The CCD employed in this unit is characterized by inducing
very little smear or blooming. Nevertheless, please take note
that smear or blooming may be induced when shooting a
bright light source.
Head drum
Video tape
Monitor screen
Moire or Aliasing
Shooting stripes or fine patterns may cause a jagged effect or
a banding in fine mesh patterns.
White dots
High temperatures can cause CCD sensor pixels to produce
the effect of white dots in the image. This condition is conspic-
uous especially when gain is applied.
This is a characteristic of the charged-coupled device (CCD).
As far as possible, use the unit under conditions where the
temperature of the unit does not increase.
INTRODUCTION
Smear
Vertical pale streaking appearing at high
luminous object
High luminous object
(Electric light, sunlight, etc.)
Blooming
Blurring in highlight
9