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the toss

Installers
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Everything posted by the toss

  1. the toss

    New guy needs help

    +1 for Jerome . A good guide is to halve the distance & you'll be close to reality.
  2. the toss

    Would appreciate someones help

    Go into the camera settings in the menu & see if they need enabling
  3. the toss

    CCTV advise

    It always worries me when people want INDOOR Domestic installations. I wonder just what their problem is that they are addressing.
  4. Lets go back to basics ( & maybe start an arguement) Firstly have a think about what IP actually is. IP is a signal transportation technique. It is not some magic camera technology. Is there any benefits of using IP in your installation? Not that I can see. Any negatives ? Well distance & power for a start. Price cable integrity Yes there are all sorts of adaptors /extenders you can get but these are always compromises. Now lets look at HD analogue. your looking at 4Mp - no problem - HD analogue currently going up to 8Mp runs on coax up to 500m with data control. Coax is robust & virtually bulletproof. you will have the same power problems as IP so if camera end power is available all the better. If not then get 24V ac cameras. All dvrs are networkable if that is an issue will run on UTP cable if required by using low cost baluns Any disadvantages in using HD analogue? The only one I can see is this often talked about "futureproofing" but given the pace of technology this is just garbage as far as the equipment is concerned. Whatever you put in will be redundant in a couple of years. If it is the cable that is the issue you have the following options - run UTP & use baluns with HD analogue, run coax AND UTP then use whatever you want. If you want a trouble free and easily maintained system I would use CVI HD analogue running on RG59.9 coax and use 24Vac cameras. I would run an extra UTP cable for whatever it might be needed for later and DO NOT USE RG6 just my thoughts----
  5. the toss

    Hikvision - the channel does not exist

    The cable you show is rubbish but will not cause the operational problems you are describing. Problems that cable MAY cause will be quality problems. I have seen wierd problems when a CVI camera is used on an analogue DVR. eg - parts of one cameras picture showing up in a different cameras picture. Check that all your gear is compatable .
  6. the toss

    Backyard Security

    Have you tried all the "normal" avenues of conciliation like talking to the dog owner??
  7. Yellow wire - video Red wire - camera +ve Red wire IR +ve ( both go to power so are essentially the same) Black wire - camera -ve Black wire - IR -ve (again both black wires are essentially the same)
  8. the toss

    help needed car headlights

    Normal operation of a cheap camera
  9. the toss

    Can I recover old data?

    This is what "usually" happens. You set your frame rate and resolution. This results in a recording capacity depending on the size of your hard drive. Recording is done in "blocks" - often 2Mb. So when you first power up an installation there will be nothing available for viewing until that first block of 2Mb is recorded. Similarly when overwriting , it is progressively done in 2Mb blocks. If yours is set up this way then the only way to extend recording capacity is to install a bigger hard drive or or drop your frame rate/ resolution settings. The other way some can be set up is to nominate a recording storage period ( lets say 30 days ) and the frame rate / resolution is automatically adjusted to enable that period to take place
  10. I dont want to get involved in this arguement (discussion) except to say one thing. Tom is correct in saying when running video over a UTP cable via baluns you should only use ONE pair. CMR characteristics are destroyed if you use more than one pair and I would be surprised if you got any picture at all
  11. Probably too late for you now but I never use bullets for outside because A) they look terrible & B) they have a really crappy mounting bracket that wont withstand objects being thrown . I always use domes. You are right about the reflected IR. It is a common mistake of novices to mount cameras as far under the eves as possible with the intention of keeping them out of the elements, but as you correctly summise , IR reflection is a real possibility. Why dont you mount them on the vertical surface of the 4x2 (left or right side depending where they are looking)
  12. the toss

    Camera below or above floodlight?

    If they are both pointing downwards then I would put the camera below the floodlight
  13. the toss

    New CCTV Business

    If you're concentrating on domestic systems (which are mainly entry level quality) then your biggest selling point will be warranty. That is the main thing that will set you apart from your competitors. There is not much difference in equipment cost and the labour will be the same regardless of brand. I'm in Australia so cant help with specific brands /distributors but my supplier gives 3 yr warranty on even their cheapest gear. (rebranded Dahua)
  14. Again , some will have it & some wont. It is usually called "motion pop up". The current DVR I use at my house has it but it is a 10 y o no name brand and standard def analogue at that. I haven't seen it on any of the HD DVRs. Why they dropped it I dont know , it is a very useful feature
  15. Swann are pretty basic systems. The firmware is such that you can see 1 , 4 , 8 or 16 cameras on a screen. There are other brands that provide a PIP (picture in picture) format that you are seeking
  16. the toss

    HD-CVI Camera

    No & in fact it may be marginally worse
  17. Since your using baluns am I correct in saying you have analogue cameras running over UTP. If so are you using HD cameras and what type (CVI , TVI , SDI , AHD etc). Is your DVR standard def , HD or hybrid. Is it a new install or existing & has it ever worked problem free. Information is good , give more.
  18. the toss

    HD-CVI Camera

    Yes they are but of course the picture wont be in HD
  19. You can use a 5A no problems. Its like having a 5 gallon tank on your motorbike instead of a 4 gallom tank.
  20. the toss

    Rolling Camera Picture

    Makes me wonder why the bad cable is bad.
  21. May the force be with you. But seriously in all likelyhood it will work ok especially if it is fairly clean as far as interference goes but I would still put it in conduit. Awful lot of trenching just to do it again and conduit doesn't cost much.
  22. As mentioned , analogue cameras are now HD . The 3 technologies for these are CVI , TVI or AHD. They all give about the same results and are just the manufacturers formats that are jostling for market share. Personally I use CVI. Thses cameras will work on the old standard def DVRs but of course wont give HD. Now to your cable. For a long time I have been trying to educate people about the difference between RG59 and RG6. This information is readily confirmable on the net. Coax cable is designed to transport a frequency range of signals from point to point. These signals take two forms - Transmitted signals which are high level signals and received signals which are low level signals. With high level signals the shieldings primary function is to prevent spurious radiation into the immediate environment while for low level signals the primary function of the shielding is to prevent reception of spurious signals from the immediate environment. At the design point this shielding is optimised for the rejection of the expected spurious signals. This gives rise to the different types of coax cable available on the market. So what it comes down to is - there are cables and there are cables. CCTV baseband frequencies extend to about 5.5Mhz. Even allowing for the chroma modulation harmonics 10Mhz would be the absolute theoretical maximun. RG59 is designed to have minimun attenuation whith maximum shielding up to about 50Mhz. NOW RG6 is a relatively new coax and is designed for the digital TV spectrum which is well above the CCTV band. (>500Mhz). The shielding is specifically designed to prevent interference at this UHF freq from getting on to the low level received signal. Interference at the low frequency that would affect CCTV signals are not an issue , they are well outside the band. So when you use RG6 for baseband CCTV purposes you run the risk of low frequency interference (50Mhz<) that RG6 is not designed to shield for, causing all sorts of problems on the low Frequency CCTV signal. In short RG59 is designed for frequencies up to about 150Mhz (CCTV) and RG6 is designed for frequencies above 100Mhz (digital TV). THe people who sell this stuff have absolutely no idea what they are talking about. "quad shield" yeah , must be 4 times as good as single shield. If you are putting the effort into 900' of buried cable then you want it to work and be trouble free. Use best quality RG59 and put it in conduit (at least 50mm)
  23. You have two problems here. Length of cable run for the video signal and length of run for the power. Lets start with the power. The distance problem ( voltage drop ) can most likely be solved by using 24Vac cameras. These cameras have a 24Vac - 12Vdc regulator on board so effectively will allow for about a 10V drop before issues accur. This will mean new cameras as you most likely have 12V cameras at the moment. The alternative is to have an adjustable power supply adjusted to compensate for the voltage drop. The trouble with this comes with using IR cameras as the current requirements (& hence voltage drop) will change markedly between day (IR off) and night (IR on). It may prove to be an impossible juggling act between undervoltage at night & overvoltage in the day. Next problem is signal level. For analogue 900' is getting towards the limit. If the coax is CCA or CCS then you are past its useable length. I assume your cameras are analogue since you are talking coax cable, BUT are they the old standard definition (obselete) or the newer High def CVI, TVI, AHD etc. These cameras will have no problems running 900' on coax or Cat 5/6. The biggest difference between the two (besides price) is the physical integrity. Cat 5/6 is a fairly fragile cable while coax can just about be used as a tow rope. If it's going outside I'd be using QUALITY coax in conduit and never have cable problems again
  24. Audio feedback is caused by an acoustic loop. Sound into mic ---> amplification ---> sound out of speaker ---> higher level sound back into mic ---> amplification ---? higher level sound out of speaker and so on. There are a number of ways to address the problem. The volume can be set to below the feedback threshold which in itself will depend on a number of factors. The physical orientation relashionship of the speaker and microphone can be changed to decrease the level of signal received from the speaker. The immediate environment can be changed to reduce (or dampen) the audio reflection from the speaker. In large sound reinforcement systems it is common to use a feedback eliminator between the mixer/preamp and the power amp. This inserts either a small time delay or a phase delay in the signal to break the resonance loop between input and output in high gain amplification.
  25. the toss

    Not the usual CCTV system needed

    Forget the camera & just enjoy your missus having your bits for dinner
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