Jump to content

survtech

Members
  • Content Count

    1,915
  • Joined

  • Last visited

Everything posted by survtech

  1. survtech

    what's with these IT people?

    Either / or! With the coming convergence of CCTV and IP, if installer/integrators don't learn IT pretty soon, they will become dinosaurs.
  2. survtech

    12v power for multiple cameras

    They would not be able to handle a high-power IR camera. Some of them draw as much as 1.5A per camera. There are other manufacturers who make higher capacity 12VDC power supplies: Altronix ALTV615DC616UL - 16 outputs, 6A total, 3.5A per output - http://www.altronix.com/index.php?pid=2&model_num=ALTV615DC616UL Altronix ALTV615DC1016 - 16 outputs, 10A total, 3.5A per output - http://www.altronix.com/index.php?pid=2&model_num=ALTV615DC1016
  3. I can tell you from experience that you can aim, but not focus, cameras using a 2.5" LCD monitor.
  4. We still need to know the compression method used. There is a HUGE difference in storage requirements between MJPEG and MPEGx (2, 4, etc.). Roughly on the order of 10 times or more.
  5. It is. You get the same effect with any tint, whether on a camera dome or a car window. The darker the tint, the larger the light loss. Silver and gold tints lose even more light than grey. Here are the light loss characteristics for Pelco Spectra IV SE dome systems: Light Attenuation Smoked f/0.5 light loss Clear Zero light loss Chrome f/2.0 light loss Gold f/2.0 light loss
  6. We mostly use clear domes unless the camera is very low or in certain situations. The reasons for this are: * Most of our cameras are high up where no one could tell where they are pointed even with a clear dome. * Smoked domes cut light by one f stop, which is often enough to cause the picture to get grainy in darker areas as AGC cuts in. * Setting a camera's iris is more difficult with a smoked dome. * We can see 100% of the casino floor anyway so who cares if anyone knows where one individual camera is pointed. * Just knowing which way a camera points doesn't tell someone what it can see. Wide-angle lenses allow a camera to see up to a 150 degree angle or more. * Add Megapixel to that and one camera can zoom in anywhere over that full angle for as clear a view as would require multiple analog cameras.
  7. survtech

    Angled BNC connectors

    Pretty much ALL connectors are rated 1/2 db loss.
  8. It probably won't work. You need a product that will pass enough light to the camera while still blocking outside view of the camera's position. AFAIK, most colored bubbles have the gold or silver material sprayed on the inside of the dome at the factory. And they still block more light than smoked bubbles. The mylar product would probably be impossible to attach smoothly to a curved dome. Gold and silver bubbles are far more expensive than clear or smoked domes - at least double the price. Replacement Pelco DF-5 clear and smoked bubbles are $75. As I recall, the gold and silver bubbles are closer to $150. Thay are also very difficult to clean since the inner coating is easily washed off.
  9. You were pretty close. Tentative pricing: $5,000 to $6,000 plus options.
  10. survtech

    Rotating a camera (not PTZ)

    Pelco PS20 series scanner: Pan 0-380° movement in horizontal plane Speed 3°, 6°, and 12° per sec
  11. survtech

    using catv cable for cctv

    100% analog cameras at this time.
  12. survtech

    Rotating a camera (not PTZ)

    No slower than the old fixed speed Pelco Pan/tilts. 3 degrees per second is a snail's pace when you are trying to follow someone!
  13. survtech

    using catv cable for cctv

    We use Pelco, Ganz, Ikegami and a few other cameras. Our DVR system records approximately 1000 cameras - all at 30fps.
  14. survtech

    using catv cable for cctv

    Sorry, no. The only PTZ'z I've worked with are Pelco, A/D and Ganz.
  15. survtech

    using catv cable for cctv

    It probably doesn't matter, though I would try it at the DVR end since that should be the easiest place to get to. If it doesn't at least minimize the bars, you may have another problem (cables?).
  16. survtech

    using catv cable for cctv

    Possibly, but it also could be a ground loop.
  17. survtech

    Cameras for a coolroom

    Check out the Honeywell/Silent Witness V60A "Arctic Night" camera. http://www.honeywellvideo.com/products/mobile/ca/37788.html "The V60N Night Hawk and V60A Arctic Night shed new light on surveillance with long lasting quality and an uncompromised picture. The V60N and V60A cameras are designed to be installed in situations where picture quality might be compromised due to low light levels. The built-in infrared illuminators allow the camera to see in complete darkness up to 40 feet (12m) depending on lens*. The V60N and V60A are effective in complete darkness with zero lux imaging. The V60A Arctic Night features an internal heater for operation in extreme cold temperatures as low as -50°F (-46°C). ...the V60A is ideal for extreme temperature environments including iceboxes and non temperature-controlled storage facilities."
  18. survtech

    using catv cable for cctv

    The primary problems could be (depending on how far you try to run it): * Weak sync * Loss of contrast * Excessive color (caused by distorted color burst signal) * Ghosting or ringing
  19. I've requested pricing info. I'll post them when I get them.
  20. Is this what you are looking for? AstroScope for CCD Cameras http://www.electrophysics.com/Browse/Brw_ProductLineCategory.asp?CategoryID=188&Area=NV "Electrophysics AstroScope is a high-performance night vision module that transforms dark scenes (below 10-4 lux) into bright, high-resolution imagery. The AstroScope 9350CCD creates a compact, powerful system that adds night vision capabilities to most CCTV cameras. The heart of the AstroScope system is a high performance Central Intensifier Unit (CIU). AstroScope's modular design permits the easy transfer of the image intensifier (the systems most critical component) to other platforms including Canon® and Nikon® SLR cameras, removeable-lens camcorders like the Canon® XL2, and a portable handheld scope."
  21. 50cm might be enough, depending on what separates the two. If each is enclosed in separate metal conduit, there will be less likelihood of interference than if each is in plastic conduit. The main thing is that the two (high and low voltage) can not share the same conduit. At least, that is what the NEC says (the U.S. National Electrical Code). Laws may vary elsewhere in the world.
  22. survtech

    Camera voltage tolerance?

    Your best bet is to measure the voltage at the camera and adjust it so the camera's voltage doesn't exceed 12.6 volts under normal operation. That assumes you don't have high current intermittent devices connected like heater/blowers or IR LED's, both of which can greatly increase the current draw and thus the voltage drop in the cable.
  23. survtech

    Pelco PTZ'S

    Probably because they aren't just an OEM product that Pelco slaps their own name on. Most likely Pelco either has part ownership in a Chinese manufacturer or contracts out custom production to a Chinese manufacturer.
×