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the toss

Installers
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Posts posted by the toss


  1. First you need to determine if the cameras are working. If they have been thrown out they are either dead or they are old standard resolution analogue cameras. Determine the voltage requirement (should be marked). It will either be 12Vdc or 24Vac. Get a cable to plug it into your video I/P on your TV , switch the TV source to A/V, apply the required power and you should get picture


  2. I made the same mistake on my first ethernet cable as well. Being an old analogue man I mistakenly thought that as long as each end of each cable was terminated in the same position then all would be well. Point to point - how simple can it be. WRONG . That is ok for DC which is why your IR was working but its not ok for the signal wires. Its a complex topic which I dont fully understand. To do with slew rates & velocity factors and other black magic stuff.


  3. If you're using a power supply for multiple cams, get rid of it and get a power supply for each. They're cheap enough. A cam with a long power supply wire run will wreak havoc on other cams and burn out led boards and even cameras.

     

     

    how about elaborating on these claims

     

     

    Firstly, because I ran into that problem. Secondly, I've been an Industrial electronics technician for the last 38 years. An extremely long voltage run has a higher resistance. It requires more current. If the IR cut shuts off on that cam, it causes a surge and will take out led's, cut filter coils, etc on the other cameras. Matter of fact, I put a power supply big enough to power 4 cams 2 weeks ago. It wasn't long before it burned out 2 ir cut coils and 2 led boards on the cams that were closest to the power supply. Then it dawned on me what was happening. I put a separate power supply on each cam and the problem is now gone.

     

     

    Without getting into a p!ssing contest about qualifications , I have a few issues with what you have said. I'll take them point by point.

     

    * " an extremely long voltage run has a higher resistance" and hence a higher voltage drop over the length of the cable. This results in under voltage at the load (camera). This will not (in itself) cause any damage to the camera or leds.

    * " it requires more current " There are only two ways to increase current to the load (camera). You can either decrease the load seen by the power supply or you can increase the voltage presented to the load. Power supply current is not something you simply turn up or down.

    * " it causes a surge ". What are we talking about here? A momentary increase in current caused by a sudden decrease in load which will in turn cause a increase in voltage drop over the length of the power feed.

     

    The problems you describe would only ever present themselves if you used a SINGLE power feed supplying all cameras in a daisy-chain configuration AND used an UNREGULATED power supply. This is something that I would hope no industrial electronics technician would ever comtemplate doing.


  4. If you're using a power supply for multiple cams, get rid of it and get a power supply for each. They're cheap enough. A cam with a long power supply wire run will wreak havoc on other cams and burn out led boards and even cameras.

     

     

    how about elaborating on these claims


  5. Ok Jerome & Tom -after a bit of homework you have me convinced. With no US address insurance is going to be the main problem. I like the idea of trying for a vehicle retrieval trip. I'm guessing that most route 66 trips are the traditional direction of east to west so I might try car rentals in Cal to see about this.

    next - what's the go with tipping ??


  6. Hello All,

     

    I continue this thread (1) because it is Sunday and I have nothing

    else better to do and (2) I will consider this educational. Maybe the

    dissertation will help someone in the future.

     

    As the original poster on this challenge I was hoping for a quick solution.

    With about 60 views in about 4 days since I posted the question

    this seems to NOT have a easy solution. Or maybe the right person

    has not logged in as of yet. So I will list again what has NOT worked to

    isolate the problem.

     

    I will post again the picture. If it does not show then right click

    and open the image in another tab.

     

    Special2018?preview=IMG_5102.JPG

     

    The camera is powered by a 12VDC wall wart on Siamese Cable

    The enclosure has a heater/blower that is powered by another

    source and I suspect it it 24VAC. All is in separate conduits

    up to the enclosure. The video is on CVBS video format. The

    bigger challenge is that the camera is about 24 feet up on a

    outside wall and only accessible by extension ladder. The cable

    is inside a 3/4" rigid conduit from camera to monitor.

     

    >> When I disconnect camera power the video picture goes away

    however the distortion remains on the screen intermittently.

    this would indicate the distortion does not originate from the camera>> When I switch to the CVBS2 input to the monitor nothing changes.

     

    >> When I disconnect the BNC at the monitor and replace with a new

    camera the video is clear and good.

    this would indicate the distortion is generated by the cable /connectors or camera. Since the test above has discounted the camera then we are left with the cable/connectors as the source of the problem

    >> When I check video from the existing camera on my test monitor

    there is NO video.

    since your monitor is showing distorted video this would indicate your test monitor is faulty>> When I install a new camera at enclosure on existing coax NO video

    is received at the monitor. Uses existing power.

    this would again point to your cable/connectors being the problem>>

    When I disconnect the 24VAC power at the enclosure to disable the

    heater/blower the distorted video does not change. (Did this late Friday)

    this shows your heater/blower is not the source of your problem

    The oldest part of this install is the Siamese RG59 cable. Maybe 15 Years old

    The plan is replace the cable with new and see what changes if anything.

     

    Personally I am baffled as to what is causing the problem. I would

    like to remove the camera and connect to my test monitor but this

    camera is a critical part of the operation. I tried to swap it out

    but with no video to the monitor I had to revert back to the original

    and work on a different plan. I really want to know what I am fighting here.

    Nothing I do points it a specific direction.

     

    Sorry this got to be a long read.

     

    At this point I don't expect a reader to jump in with a "Ahh Haa Moment"

    that will break the open what I am missing.

     

    If the new cable fixes or not I will post that information. Should happen

    later this coming week.

     

    Thanks for reading.

     

    Les

     

     

    I'm beginning to think you may have more than one problem here since you have conflicting test results , but generally it looks like being your cable/connectors. Coax will not degrade with age unless it is damaged somehow so start with replacing your BNC connectors and see how you go


  7. Myself , my son & a friend are looking at doing the Route 66 drive about this time next year. I am looking for someone who lives in the Chicago area to liase with and maybe help out with information etc. The idea is to purchase a cheap car at the east end & dispose of at the west side. Info on the purchase and selling of vehicles in the states as well as anything else that may be relevant would be handy. Hoping someone can help out.

     

    thanks in advance - The Toss

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