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Re: Long Runs - CCTV



"ABLE1" <someone@xxxxxxxxxxx> wrote in message
news:GvK7y.142417$2K.88097@xxxxxxxxxxx
> On 12/2/2015 5:29 PM, ABLE1 wrote:
>> On 12/2/2015 1:08 PM, Bob La Londe wrote:
>>> Back in the day we all had to deal with the 750' limit.  We all knew we
>>> could push it further, but if we wanted to "know" it was good we made
>>> sure
>>> it was close to max for runs.  I special ordered 95% Cu RG-6 and was
>>> able to
>>> run 1000' and for black and white cameras there are some I nstalled at
>>> nearly 1500' on that coax.
>>>
>>> Then along came twisted pair and amplified twisted pair baluns that
>>> cdould
>>> push composite video a couple miles.  With RF links (some) you could
>>> push
>>> composite video several miles.
>>>
>>> Now we have to take a step back.  318' limit (100 meters) with IP
>>> cameras.
>>> We can stretch that a little, but that's the magic number for
>>> ethernet.  Its
>>> not the signals won't travel further.  Its that the timing is all off
>>> if you
>>> stretch it to far.  Multi Megapixel IP cameras are the bees knees.
>>> The cats
>>> meow.  Bob's pre marriage dating history.  Whatever.  LOL.  How are you
>>> dealing with those long runs?  Its not always practical throw POE
>>> switches
>>> up all over the place as repeaters either.  I work on facilities
>>> routinely
>>> with runs of 500-700 feet, and one old install I did ages ago with
>>> oversize
>>> coax had a couple runs approaching 1500'.
>>>
>>> What is the answer.  I push POE IP cameras often now because of the
>>> price to
>>> features ratio and the ease of installation (nearly PnP), but how are
>>> you
>>> dealing with distance issues?
>>>
>>
>> Bob,
>>
>> I personally to date have not had to deal with it.  However, if I did or
>> was going to, I would treat it as computer network. (which it is)
>> Install Data Switches as hubs. The place your PoE switch or utilize a
>> local Power Supply near the camera.
>>
>> Something else I would consider depending on a number of factors would
>> be to use Fiber.  Placing a Ethernet to Fiber module at each end can
>> transmit the video data long distances.  It would depend on number of
>> cameras and the budget.
>>
>> Again, never had to.................... yet.
>>
>> Hope that helps.
>>
>> BTW if you are not already a member, this forum can be a help sometimes.
>> http://www.cctvforum.com/
>>
>> Like any forum, you need to read between the lines at times.  But you
>> can glean out some good input and see other opinions that can point you
>> a direction that can help.
>>
>> Hope that helps.
>>
>> Les
>
>
> FYI  Just saw this equipment in the latest Tri-Ed monthly flyer.
> http://www.vigitron.com/Vigitron_Video_Transmission_Products.aspx
> Specifically the Vi3002 Repeater.  The specs state daisy chain up to 8
> units for a total of 3000'.  Hummmmmmm  Interesting.

That has potential.  I'll have to see who else has it.  From Tri-Ed I could
never count on getting what I ordered.




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