RE: Geovision

["Brian G. Reynolds" <brian.g.reynolds@xxxxxxxxxxxx>]

Thanks for the reply Paul,

I think I will try the CT100 and see what happens.

This has cost me too much anyway....

B.

-----Original Message-----
From: Paul Robinson [mailto:ukcueman@xxxxxxx]
Sent: 18 October 2005 01:57
To: ukha_d@xxxxxxx
Subject: Re: [ukha_d] Geovision


> Can at least 1 person reply to this please as I am feeling very
> lonely!!
Ooh...please don't feel lonely!

> Just bought my first Geovision GV-650-12 and so far I am very pleased
> with it!
>
> One problem I have come up against, my original system, a MV-100, was
> located in my workshop, therefore my cameras all terminate there.
>
> But now I find it might be better to locate my Geovision PC here in my

> loft conversion which means re-wiring....
>
> This is going to be a quite a task but the question is, what cable do
> I use?
>
> I was thinking CT100, that way I could use it for Cable TV if ever I
> wish but I do have some long runs of BNC networking cable which works
> fine.
Yes. CT100 is a good choice. CT125 is a higher quality cable, but much
thicker which means larger bend radius. CT100 is probably what you want.

If you're laying cable though, do make sure you put some extra cat5
down, just in case...

> I could run CT100 from my Loft down through the house and terminate it

> in the rear living room then run the cables from the cameras through
> to connect in the living room, this sounds the best solution, but do I

> still use the CT100 from the cameras to the living room or use
> networking coax?
I don't know what the specifications/characteristics are for 10base2
coax (assuming that's what you meant), but I'd be surprised if it was
appropriate for this job. If you do have a join in the cable at your
lounge, then that will cause additional losses/reflections. It would be
better not to do this, although it probably won't matter.

>
> I have 4 CAT5e sockets in the workshop but 3 of these are being used.
>
> Is there such a thing as a CT100 to RJ45 converter?
Yes. The generic name for such a thing is a balun (because it converts
an unbalanced signal to a balanced one and then there's another device
at the other end to reverse the process). Active baluns ought to do a
better job that passive ones. The active balun of choice around here is
Keith's Kat5 and you should be able to send 4 composite signals using
kat5 down one cat5 (may need a custom unit for that though).

>
> I was also thinking of supplying the camera power from the loft, like
> I do for a PC based CCTV system I use, and then use CAT5 to move the
> video and the power to the required CCTV location.
cat5 can handle 4 camera signals. If you want power as well, then you'll
need to lose one of the video signals...and then it's definitely a
custom kat5 pair, if it can be done at all.

HTH
Paul