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Automatic Gain Control (AGC)
An electronic circuit that
automatically adjusts the gain of a signal as a function of its input or other
specified parameter.
B.L.C.
(Back Light Compensation)
Electronically compensates
for high background lighting, giving detail to objects which normally would be
silhouetted.
BNC
Connector for Video cable, commonly used in the industry.
CCD
Charged Coupled Device. A solid state semiconductor imaging device often
referred to as an integrated circuit, chip or "imager."Solid state cameras are
often
referred to as CCD cameras.
CCTV
It is the
abbreviation for Closed Circuit Television which is a private or closed
television system.
Coaxial
Cable A type of
shielded cable capable of carrying a wide range of Frequencies (video or audio/
with very low signal loss.
dB
(Decibel) A logarithmic ratio of two signals or values, usually refers to power,
but also voltage and current.
DSP
(Digital Signal
Processing) Refers to the electric circuit section of a device capable of
processing digital signals.
E.1.
(Electronic Iris) Shutter
Electronic Iris shuttering
is the ability of the camera to compensate for moderate light changes in indoor
applications without the use of auto iris lenses.
FIELD OF
VEIW The area that
can be seen by the camera.
GB
(Gigabyte) Unit of
computer memory consisting of about one thousand million bytes(a 1000
megabytes).
Ghz
(GigaHertz) One
billion cycles per second.
HAD
(Hole Accumulated
Device)A type of CCD sensor with a layer designed to reduce interference.
I.R.
(Infra-Red) A light
where the frequencies are lower than visible lights whereby the CCD camera can
use it for a light source, but it can not be seen by human eye.
IRIS
The adjustable
opening (mechanical diaphragm) through which light can be pass
and regulated.
LAN
Local Area Network
LENS
A transparent
optical component that converges light rays to form a two
dimensional image of
that object. It can be made of glass or plastic. The best lens
is made by glass.All
of our cameras have a glass lens.
LUX
A unit measuring the
intensity of light. A one foot-candle= 10 lux.
MANUAL
IRIS LENS A lens
with a manual adjustment to set the iris opening (f-stop) in
a fixed position.
Generally used for fixed lighting applications.
MONITOR
Device that converts
electronic signals into the video image that is
generated by the
camera and lens
MULTIPLEXER It is a
device that allows you to view up to 16 camera images on one monitor screen at
same time or different times.
PAN
Side-to-side movement of a camera on a horizontal axis.
PIP
Picture in picture.
QUAD
Device that allows
one view of up to 4 camera images on 1 monitor screen
at same time or
different times.
RCA
CONNECTOR A video or
audio connector most commonly used in plug and play
video or audio
equipment.
RADIO
FREQUENCY (RF)
Signals with a repetition rate above audible range, but below the
frequencies
associated with heat and light.
RESOLUTION A measure
of the ability of a camera or television system to reproduce
detail. Typically
refers to the number of picture elements that can be reproduced with
good resolution.
SCANNER
A device that can
pan only.
SWITCHERS Alternates
the displayed video image from one camera to the next.
Cameras cannot be
viewed at the same time.
TFT
(Thin Film
Transmitter) This technology is used mainly for manufacturing flat computer and
video screens that are superior to LCD screens. Color quality, fast response
time and resolution are excellent for video.
TILT
The up and down
tilting movement of a camera.
TIME-LAPSE VCR Video
recorder that can record frames with pauses between them,
thereby extending
the time that a standard tape will last. The longest time-lapse VCR is
960 Hrs. However,
digital recorders can last for a much longer period and with better resolution.
VARIFOCAL LENS A
lens with a variable focal length. May be used as a wide angle,
standard, or
telephoto lens.
WAN
Wide Area Network
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