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rapid

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Posts posted by rapid

  1. Posted

    Can you use the alarm cable as a pull string and pull the new cable into position?

     

    Failing that, you could go for NVT or NIT unshielded twisted pair units.

     

    http://www.nitek.net/

    http://www.nvt.com/

     

    Your existing cable is not recommended, since the system can become very susceptible to interference (degradation of video display) whenever extraneous signals are present if not using twisted pairs.

     

    Give it a try to see what type of video product you get at the other end and then go from there.....15 metres isn't that far.

     

    I'd pull in new cable if I was you.

     

    Cheers.....Rapid

  3. Posted

    I think you mean DVR units come with analog outputs... .that is dry contact output terminals.....for example alarm output which can drive other equipment.

     

    As most of these outputs are low voltage and consumption, you'll have to interface a DPDT relay with this output so that it can drive your 230vac fixture.

     

    Should be able to find circuits on-line or local suppliers (The Source) where you can buy them.

  5. Posted

    Looking for input on an upcoming parking lot application. Any input would be greatly appreciated.

     

    Application: To provide video surveillance of parking lot.

    Reason: Employee Safety as mostly women, work late hours.

     

    Details:

     

    1. Fenced employee vehicle compound approx. 40 x 100 ft. Paved lot.

    2. Existing high pressure sodium light fixtures providing even illumination of lot...haven't had the chance to measure current levels.

    3. Some trees installed on an island dividing the parking lot (20 x 100ft)...client has agreed to remove some.

    4. Two towers will be erected to support video cameras and view down each divided section.

    5. Fixed cameras will be installed on these towers to view along fence line and gate openings.

    6. Proposing two dome cameras with Autotracking capability to follow employees to their cars.

     

    There is a receptionist on site who will be able to view cameras, however with their other tasks, they are wanting to automate camera switching, follow the target, and record activity.

     

    Of what I can find, the only cameras with Autotracking are the Bosch Envirodome & the Panasonic WV-CS954 unitized camera.

     

    Anyone have other suggestions for Autotracking cameras?

     

     

    Cheers.....Rapid

  7. Posted

    Have used similar product from FM Systems but all these systems work over coax only.

     

    To transmit two real time analog pictures, the first channel is modulated ontop of the second channel. That being said, these products require a bandwidth of 12 Mhz to pass both videos. No problem for coax, however not possible with most wireless systems as they are typically 6-10 Mhz bandwidth challenged.

     

    Rapid

  10. Posted

    Looks like you started off with a good design. If the client wanted a wider picture, might of been in your best interest to install another camera.

     

    I hear you....and when the !@%^ hits the fan, they want CSI so you can zoom in and read the guys DNA after the fact!

     

    I know we hate paperwork...but what clients need is a statement of procedures (SOP). Included in this would be a description of the system, how it operates, what are the limitations, how tapes (oops!) hard-drives are stored, who has access to them, ensuring time/date is acurate, what happens in the event of an incident.....and as cctvgeeknz mentions, actual camera views with time/date. And finally, have the client sign off.

     

    FYI....You could have a look at Covi who have done parking lot applications similiar to what you may need. One camera, three different views.

     

    http://www.covitechnologies.com/products/analog/evq-1000

     

    Cheers.....Rapid

  11. Posted

    I'm sure your IR is working, although I doubt that the camera will see anything.

     

    940 nm is considered covert (no red glow). If your camera is not sensitive in this range, you may have to choose a 770 nm fixture (near infrared)

     

    Post some pictures so we can see.

     

    Rapid

  14. Posted

    Are you looking for a small card access system? if yes, check out

     

    http://www.keyscan.ca/ or

    http://www.honeywellaccess.com/products/software/18120.html

     

    as an example.

     

    If you are not familiar with card access systems, there are many alarm dealers in your area which can assist and meet your needs.

     

    These systems are not like an alarm system, as they can be labour intensive (installing door strikes for example)

     

    Cheers.....Rapid

  15. Posted

    Bob's a great speaker with a wealth of experience. Saw him at ISC in Washington a few years back. Got him to instruct on a training course and the guys came out with hints/tricks at solving video problems.

     

    Have to say my first experience with twist-on connectors wasn't the best. The previous installer had a poor stripper resulting in a mess of intermittent video on a video patch bay (100 connectors). The center conductor was too long and ended up with an "S" at the end. Found a good stripper (I know) and was able to rectify the video.

  18. Posted

    Good question jisaacmagee.

     

    Pulled this off a website which shows the color rendering index (CRI) which is a measure of how accurately an artificial light source displays colors as this is always a challenge for us. And when there is an incident you want to correctly identify an individual. Did the "client" have a yellow jacket or a brown jacket.

     

    41012_1.jpg

     

    "CRI is determined by comparing the appearance of a colored object under an artificial light source to its appearance under incandescent light.

    The higher the CRI, the better the artificial light source is at rendering colors accurately."

     

    All too often we find the terrible low pressure sodium installed at sites (guess the bulbs are cheaper) With government buildings they are coming with increased lighting as it is a Health & Safety concern....employees walking to their cars....guards making patrols.

     

    One of lights that bugs me is those bollard looking lights (3 feet) Hard to mask them out of the picture.....boy I hate architects

  19. Posted

    Have a look at this Videolarm QFID housing. Planning on using this for a parking lot application looking different directions.

     

    Their housing can accommodate up to 4 board cameras. You choose the lens/canera combination. Dome housing is 12 inches with an 8 inch dome. Housing is all factory wired.

     

    40606_1.jpg

     

     

    Maybe this will meet your needs.

     

    Cheers......Rapid

  21. Posted

    Don't know the product you found, perhaps other members have seen it.

     

    Most DVR's/multiplexers have looping inputs....so that you can link other devices....switchers....dedicated monitors....prefer this than T's....

     

    DVR's with multiplexers will allow you to display each camera individually or all cameras on one video monitor output (Monitor A)....some also have an "alarm" video monitor output as well which can "call up" (Monitor B) a camera in alarm (contact or video motion) and display camera in alarm. Could be used for exterior camera viewing say "shipping/receiving" to alert the receptionist.....

     

    Note to self...remember to pick a large enough monitor to do the job for the DVR....probably nothing smaller than 20" so you can at least see the pictures.

     

    From this DVR, you can install a simple quad switcher at her desk where she can individually select a camera, sequence through all, or multiscreen them all....course you have to pull the video to her desk.

  22. Posted

    As with automatic iris lenses it's necessary to control the operation of the iris to maintain perfect picture levels.

     

    Video Type Lens:

    This type of auto iris lens contains internal amplifier circuitry to convert the video signal from the camera into iris motor control.

    This is the older style lens which is usually larger than its counterpart.

     

    DC Type Lens:

    This type of auto iris lens is driven by a reference voltage produced by the camera.

    The lens contains a driving motor to open and close the lens.

    In effect the camera contains the iris amplifier and operates the iris motors.

    Less expensive and smaller than the video type lens.

     

    Most cameras now have both types as you have discovered.

     

    Cheers.....Rapid

  23. Posted

    The only certification you'll see is a UL rating as the 120 vac power supply must meet Underwriters Laboratory......if there is no UL or CSA rating, stay away as you'll be in trouble if the power supply fails and causes a fire!!

     

    Other than that, stick to the name brands who at least want to meet their clients standards and have a quality product.

     

    Policy and standards like you mentioned aren't updated as often.....pretty hard to set a standard when the industry is changing so often.

     

    What is your application?

     

    Are you installing this to look at your neighbours backyard?? Is that what you're afraid

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