Re: Bosch CCTV distance dilemna

[Matt Ion <soundy106@xxxxxxxxx>]

I assume you're using passive video baluns to run the video over the
Cat3?  1500ft. is a bit long for passive, you may need to go to active
baluns to get clear video.  1500 shouldn't be too bad for serial
control, as long as you're terminated properly... are they running
RS-242/422, or RS-485?

Try popping over to www.cctvforum.com with your question, there are a
lot more people there who are experienced in this area.

On 26/11/2009 1:08 PM, Silicon Sam wrote:
>    I have a local client that has a campus with 8 buildings.  Buildings
> 1 through 7 have all their CCTV piped over to building 1 via twisted
> pair, and the Bosch Bi-Phase over 18ga shielded twisted pair.  All is
> good with 6 of the buildings. (building 8 has a completely different
> CCTV system)
>
>    Building 7 however has a single 25 pair Cat3 cable running 4 twisted
> pairs for cameras, TR560 and TT560 used for video, and a couple of
> pairs for Bosch Bi-Phase control.  Video is weak and crappy, and
> control is non-existant.  I measure about 400mv AC at the headend for
> control, like 4mv while joystick is moving at the building 7.
> Obviously this is not the right cable.  It was installed maybe 3-5
> years ago, no one at the site has seen it work, so we don't know if it
> ever did.  Cable run is approx 1500 feet.
>
>    I have several options, I think, and wanted to see if anyone has any
> others.
>
> Try to triple, quad, or more up the 24 gauge wires on the control,
> since we have so many spares.  Hadn't tried that yet, but video sucks
> anyways.
>
> Go with a fiber link between the buildings.  The LTC 4628 and 4629 are
> quite pricy however.
>
> Go with some sort of Ethernet converter for this 1 building. Keep in
> mind 4 cameras, 2 are PTZ Autodomes.
>
> Add a small Bosch DVR at building 7, and monitor it at building 1
>
> I had thought of running the video and control over to building 8, but
> it has AD cameras and a March DVR, and I don't think the DVR over in 8
> can handle the AD and Bosch Autodomes using 2 different protocols for
> control.