TUCoPS :: TV, Cable, Satellite :: remotesu.txt

Closed circuit TV

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                          - SIR FRANCIS DRAKE - 
           *                                                     *
            *                   Remote Surveilence              *     
             *                         By                      *
              *                  Closed-Circuit TV            *
               *                                             *
        The objective of this tutorial is REMOTE SURVEILENCE without the
object realizing they are being surveyed.  To help illustarte this project
we shall use surveilence of a hotel as a example.  The reason is to protect
goods.  Because of this it must be meet the following criteria:
1.  It can be watched in real time, but also capable of being recorded.
2.  It must be hidden so the customer can't see it.
3.  It must not waste time of security officer or tape by just watching an
    empty room.
                                -Objective #1-
           Objective #1 reads "It can be watched in real time, but also
capable of being recorded.  We'll split this in two parts and now
concentrate on the first one (be watched in real time).  To do this it
must take the picture and transmit it over the air as running a wire to
say, the 20th floor would be a hassle.  To allow the pictures to be
transferred you need three things: A camera, RF modulator, attena, and
perhaps a linear amplifier depending on how far you want it to go.  The
camera can either be purchased legally whitch would come out to about
$800, or ordered with those wonderfull things called credit cards.  An
even better way is to go to a parking lot or other place where they use
closed-circuit video to monitor people and snag 'em.   A quick note, if
you want to prevent a camera from seeing you but dont want to  phisyclly
damage the surveilence device they can be temperarily knocked out of
commision by flashing a bright light (flashbulb, etc.) as close to the
lens as possible.  Anyway, I recommend Sony and Panasconic cameras if
you have a choice.  They must be capable of RF output.  Which brings us
to the RF modulator.  Greatly simplified what a RF modulator does is
modify the signal for a channel.  To get your personal RF modulator go
to any fine electronic stores including Jerrold Electronics Corp. 4th
and Walnut Sts., Philadelphia, Pa. It sometimes is called cable driver.
Next comes antenna. The antenna most comonly used for TV output is the
Di-Pole Antenna.  What it is is a tall pole with normally three sets of
four prongs jutting out horizontally.  For more infromation on antennas
(and much of th e other stuff discused here) check out Radio A mateur's
Handbook published by American Radio Relay League  Newington, Conn.
06611.  TV signals traval straght from the antenna and therefore and be
fucked up by buildings in the way, specifically metal type ones.  To
avoid this you would put the antenna as high as possible, in this case
top of the hotel.  Or if the hotel was short put in atatched to a
balloon, etc.  Another quick note, it is therertocally possible to use
someone elses antenna for your signal and obviously if it is a better,
and bigger antenna your signal will be better and go farther (amazing,
huh)!  And now we are finnaly to the Linear amplifier.  All this device
does is strengthen your signal.  A 5-Watt amplifier will go about 3 122
                               -Objective 1.5-
    To record it nothing could be simpler.  Go to any large deparment
store, or electronics shop and the will have VCR's (Video Cassette
recorders).  They cost around $600 and once you get one you attatch it
to the TV, and operate it just like a tape recorder (IE hit record
button to record whatevers on the screen, etc).  I realize that 98% of
amerikans have VCR's but I dont want to leave that 2% in the dark...
                               -Objective 2-   
   Objective #2 is to not let the customer know the device is there.
This includes both visual and hearing.  The hearing is the easiest, the
camera may make a minimun of droning, symply "pack it" in a heavy
towell, etc. The three best ways in order of easiest 1.  Hidden in
lights, 2.  Through an extremely small hole, 3. behind a one way mirror.
First of all in option 1 (hidden in lights) this would be fluorcent
panel lighting where it would be easy to hide the lens behind the pice
of plastic below the lights.  Plastic that diffuses light will work best
as that way the customer will not even be able to see the outline of the
lens (not that most people stare at the lighting in a hotel).  Option 2,
an extremely small hole, has the advatage of letting it be located on
the wall or ceiling however the picture quality goes down significantly.
The way it works is you narrow the lens (zoom) to a small hole that has
a 360 degree view.  These can easly be purchased as "peep holes" that
are installed in most homes to allow the resident view outside the door
"safely".  The last method involves one way mirrors, and youd have a
camera behind it.  It sounds very easy, and I'm sure its possible
however I have no idea where you get one way mirrors...Oh Well!
                               -Objective #3-        
   This one can be done many different ways.  Simply put, you must
have a device capable of turning on the camera when there is a person
or persons in the room.  The most fail-safe way of doing this
is by heat detection (ie infra-red).  They are often used to turn on
lights when heat is approaching (ie a burglar), however some also have a
light sensitve deal that turns itself off when day begind (turning on
lights just isnt very effective during the day...).  To fix this put a
dark 6!over the eye (the light-sensitive one).  These devices are
avaiable at most electronic shops.  Other methods include light beams,
pressure mats, etc.  However they can be screwed up if more then one
person comes in.
  Many large electronic stores (Heathkit is one) have closed circuit
TV for about $350.  It includes a bww TV, 50 feet cable or so, a camera,
and sometimes a intercom.  The problem is that you have to use cable but
it will work well in some cases.  Also, there are a some video cameras that
will send (TV signals) to their corresponding VCR.  The RCA VKP-900 VCR, 
along with CKC-021 camera are capable of this (if I got the model #'s right).
Well, if you have any questions contact me.
                          -=:>Sir Francis Drake<:=-

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