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kensplace

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Posts posted by kensplace

  1. Posted

    Multiplexers usually have at least two outputs, one for 'recording' from, which does exactly what you are seeing now, all cameras switching in sequence very fast, and another that you can view the live image of any particular camera on a monitor.

     

    To view recorded images, your DVR needs to play back the rapidly switching images back into the multiplexer, that then will allow the selection of one particular camera to view.

     

    So your DVR monitor output needs to go into the input on the DVR, and your DVR should have a play mode, so you can play on the DVR and then select which camera to view on the multiplexer.

     

    you will need to view the multiplexers output on a monitor, instead of the DVR's output.

     

    Be aware, not all single channel DVR's are compatible with all multiplexors, some have a seperate input to 'sync' the rapidly changing images from the multiplexer to the DVR, some dont. Also, some DVR's do not record the 'hidden' frames that are used by some multiplexors to sync the playback.

  5. Posted

    Its a good job the police did not see whoever it was taking the photo's doing it, they are sometimes really over the top when it comes to people taking pictures of CCTV/Security equipment...

     

    They have had adverts telling people to report suspected terrorist behaviour, including people paying attention to cctv cameras, photographing them etc..

     

    Its a bit of a pain, when you are heavily into CCTV and also like photography....

  7. Posted

    I cant even recall the last time I had to restart my geovision server un-planned...

     

    I think it might have been after a prolonged power cut, and the UPS ran out of power....

     

    It just works, and remains stable.

     

    Now and again, I will install updates etc and reboot, but other than that, it just sits in its rack and works without any problems.

     

    I have seen pirated geovision cards, they look just like the real thing, although the ones i had did not have the hologram the newer cards have (like the one on my geo 1480 card). However, the pirated ones wont work with modern geovision software, they require cracked software, as the 'security' that is present on the custom pic chips on the real geo boards is not present on the fake ones. The chips are present, but the code that is on them isn't as they cant copy that.....

     

    I record in full D1 (pal), Im sure the previous versions ran faster though, the new ones seem slower... More sluggish. I will try the latest version soon, Its out I think, to see if its faster, if not I may go back a version or two...

  13. Posted

    Muxlab did some research on baluns (they also sell baluns) and concluded

     

    Nighttime Operation

    When the CCTV Baluns are used in nighttime conditions it is found that the image

    luminosity may not be as good as when coax cable is used. This is because the pair of

    baluns introduce approximately 3dB of signal loss, resulting in a loss of picture

    luminosity under very dark conditions. If this occurs, the solution is either to replace the

    passive CCTV Balun at the receiver end by an active CCTV balun or to replace the cable

    by coax.

     

    http://www.muxlab.com/assets/files/application_guides/VE_CCTV_Balun.pdf

     

    Analogue CRT monitors will enable you to see problems with a picture from analogue cameras easier than LCD style monitors, CCTV (analogue) was designed for CRT display, so you will get a better picture on one. They are bulky and expensive to run compared to modern flat screens, so many people prefer the newer style, for cosmetic purposes...

  14. Posted

    Depends on the camera really, if it is a day night model with a ir cut filter that removes at night IR will work at night, and be blocked during the day... Why not put a photosensor switch on the IR to save the electric bills, and the life of the ir unit so it only comes on when its dark?

  15. Posted

    Remember, even if its a genuine one on ebay, geo wont give support to any card not purchased through a authorised seller, and they dont have any authorised sellers selling cards on any auction sites.... So not one single card on ebay can come with genuine geovision warranty or support.

  18. Posted

    Why don't CMOS cameras work with Geovision....Contacted Geovision and they never gave me a answer,they just

    had me connect the camera to various video connections, which worked, but the camera will not produce

    a picture when connected to a Geovision sytem, Told me I should use CCD cameras

     

    Cannot see why their should be a problem, what *exactly* did geovision say to you.

  23. Posted

    I have a pc and it has a Geovision 800 16ch card. The pc had windows xp and DTT USA software but recently the hard drives both crashed and everything is gone.

     

    I replaced the hard drives and, because I do not like Windows very much, I installed ZoneMinder Linux on it. And now i can't find drivers for the Geovision card. Apparently they don't make any ( i hope i am wrong ).

     

    Does anybody know where to find linux drivers or how to get card to work under linux?

    or

    Does anybody know how I can rebuild the system with drivers for the card and software if I install windows on it.

     

    I do not have any of the original cd's that came with the system and I have called DTT USA to request copies and they said they do not make that version anymore and they just tried to sell me something els.

     

    Please somebody help!!!

     

     

    if you email geovision (or your card distributor) with the details of your card (serial number etc) then they will supply you with a link to download the windows software for the card.

     

    Im not aware of any official linux drivers for geovision cards.

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