
C.C.T.V. CRASH COURSE
The information below is
designed to educate you on the different components that make up a closed circuit
television monitoring system. We furnish and install numerous other products and
product-lines, but for educational purpose, show only certain items.
Cameras, Mounts, Lenses, And Outdoor Housings
Standard resolution cameras have approximately 380 lines of
horizontal resolution. These horizontal lines make up a picture on the screen. These
cameras can used be when lighting is constant, when there is not a considerable amount of
back ground light, or when fine detail is not a concern. Picture quality is good. These
cameras are less expensive than high-resolution camera. The lens, mount, and power supply
is sold separately. Available in color or black and white.
High-resolution
cameras have approximately 500 to 600 lines of horizontal resolution. The more
horizontal lines, the more detail and sharpness on the screen. These cameras can be used
when fine detail is a concern. Usually we install use these cameras outdoors, or where
there is considerable backlight. The lens, mount, and power supply is sold separately.
These cameras will provide a picture with very little light. Available in color or black
and white.
Lenses
are sold separately with the above cameras. A fixed lens is chosen by the area you want to
cover. For example, a 2.8-millimeter lens would be used to cover an entire room where an
8-millimeter lens would be used to cover a persons face entering that room. We sell
only automatic iris lenses, which adjust to light changes. Variable focal lenses allow the
installer to actually "dial in" the customers coverage preference.
Outdoor
housings protect the above cameras and lenses from moisture, heat and cold. Each
housing has a heater and fan or blower inside. There are also electronic thermostats
inside the housing that trigger the heater and blower when to turn on. The housings heater
and blower protects the camera from moisture, cold and heat.
Outdoor
housings are also available in a dome mount or vandal or bullet proof versions.
Bullet cameras are smaller than the cameras above. The cameras come with
a lens already attached, cable, power supply, and mount. These cameras can be used indoors
or outdoors and are more economically priced than the regular cameras shown above.
Available in color or black and white.
Self-contained
specialty outdoor cameras with standard or high resolution are also available.
These weatherproof cameras can be where space is in issue. These cameras do not have the
bulk of a regular camera with an outdoor housing. Mounts are furnished but the power
supplies are sold separately. Available in color or black and white.
Night
cameras are available that will light up an area at a limited distance without
any external lighting. These cameras are use in dark, outdoor areas. The little circles
around the lens are actually infrared illuminators, and the camera gets its light source
from these illuminators to show a picture in pitch-black darkness. Night illuminators are
also available to work separately from a camera in a outdoor camera housing and will
illuminate a pitch dark scene in a larger area.
Covert or
hidden cameras are available as well. These cameras actually look something other
than a camera. These cameras can be when you do not want others to know you are actually
using video surveillance. These cameras are available in smoke detectors, motion
detectors, thermostats, telephones, clocks, exit signs, picture frame with picture,
mirror, and more. A good example of this type of application is installing one of these
hidden cameras over a cash register. Available in color or black and white.

Camera mounts can be used with the first two cameras on the page. They
can be wall, or ceiling mounted and come in different colors to match decor
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Cameras can also be mounted in low profile
drop ceiling mounts or smoke colored domes. These mounts protect the camera and are more
discrete or not as obvious as a camera mounted on a wall. These mounts are usually used in
bars or taverns |
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Power Supplies
Plug
in transformers provide power for cameras. They can be plugged into any 120 Volt
outlet and power a camera. These power supplies can be used when there are only one or two
cameras installed. These plug in power supplies are not individually, therefore they
do not protect a camera from a power surge, short or over voltage. These power supplies
are much less expensive than multiple camera power supplies
Multiple
camera power supplies can be used when there are more than four cameras. These
power supplies take up much less space outlet wise. They can power up four, eight, or
sixteen camera at one time.
Multiple camera video processors.
Multiple camera video processors allow for multiple
camera viewing and recording on a single video recorder. These units below are a
description of the different video processors available.
Switchers
are low cost; desktop, sequential switchers designed switch manually to four, eight,
twelve, or sixteen cameras to one or two monitors. A security video recorder will only
record the amount of time each camera is switched to. Therefore, all cameras will not be
recorded simultaneously, but as they are sequentially switched.
Quad
processors are low cost, video processors capable of displaying full-screen or
quad views of four camera inputs. The screen in divided into four and all four cameras can
be recorded simultaneously. Quad units also can be used as a sequential switcher. You can
not, however pull up a recorded image full screen. Available in color or black and
white.
Multiplexers
provide high-quality recordings and outstanding multi-camera displays. Available in 4, 8,
9, or 16 channel versions, multiplexers show and record 4, 8, 9, or 16 cameras
simultaneously for recording on a single VCR. During recording and playback any camera may
be viewed independently or combined in a multi-camera display. Every camera is recorded
simultaneously. Some multiplexers also have a zoom feature used with either live or
recorded video. You can pull up any recorded image full screen. Available in color or
black and white.
Security video recorders
Security video recorders are industrial quality recorders
made for repeated everyday use. The video recorder is the weakest link in the c.c.t.v. A
recorded camera image never is as good as a live camera image. There are many different
video recorders to chose from. Depending on the recorder, security video recorders can
record up to either 8, 24, 48,96, or 168 hours on a single videotape or up to 960 hours on
a digital recorder. Time lapse recording means if you were recording a person walking, you
may see every third step, where as in real time, you would see every step the person
takes. Real time means as close to real motion as the human eye sees. Some of the
different recorder options are:
8-Hour
Real -Time Video Recorders with Half Size chassis can record eight hours on one
videotape.
Time-Lapse
video recorders are available in 24, 72, 96, or 168 hour. These decks do not have
automatic time and date search. These recorders are less expensive than real time or
triple density decks.
24 Hour
real-time Video Recorder with Half Size Chassis have Three Recording Speeds 8,
24, 40 Hours. Real Time. Time/Date Search, which lets you search a date and time on a tape
without watching the entire video is a great feature.
Full
Size Real-Time Triple Density Video Recorders record standard time-lapse and
real-time recordings. Triple density means that three times the amount video signal is
being recorded therefore you get a much clearer playback of recorded images. These
recorders are available to record 24, 96 or 168 hours in real-time. These recorders have
time and date search and more expensive than time lapse recorders.
Digital
Video Recorders, or
DVR's record camera images
to a hard-drive, not a video cassette. The clarity and definition of each
recorded image is much better than images recorded with a videotape. Prices
of digital video recorders have dropped considerably in recent years, and
are now very affordable. A digital video recorder can be set up to record
motion events only, which means when there is no activity, no recording will
take place.
DVR's also make searching for recorded events much easier by allowing a user
to search specific times and dates. DVR's can be ordered with bigger
hard-drives to store more images. Remote software is also included so you
can view your facility from any computer.
A video
recorder lock boxes protects the video recorder, as well as the tape
inside the recorder. These units have a lock and key, as well as a fan to circulate air so
the recorder does not over heat.
Monitors
Monitors range in size from 9 inches to 20 inches and are available in
both black and white and color. Security video monitors allow you to use more than one
monitor by connecting from one monitor to another. Television sets do permit this. Some
monitors have audio while others do not.
Remote Transmission Video
Remote transmission video allows you to view cameras with a
modem and a computer from anywhere in the country. Imagine sitting at your home or office
- maybe in your hotel room while on vacation or a business trip - viewing the activity at
your sites using your laptop or PC. Now you can monitor your home or business for security
and productivity from anywhere. You can connect by standard phone, cellular or high speed
lines.
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