Re: [OT] 5" B&W monitors

["matt_miles_uk" <m_miles@xxxxxxxxxxxxxxxx>]

Cheers Keith,

Matt

--- In ukha_d@xxxxxxx, "Keith Doxey" <ukha@d...> wrote:
> > -----Original Message-----
> > From: matt_miles_uk [mailto:m_miles@b...]
> >
> > Hi Keith,
> >
> > I'm interested in using a bank of these for CCTV... (a long way
off
> > yet as i'm skint but hey I can dream!)
> >
> > Is there an easy (cheap) way of getting an input from the
composite
> > CCTV camera into both the TV(maplin) AND a capture card like
others
> > use on this list?  I want to be able to locally monitor the
input on
> > the TV's (hence the reason for getting them)and also remotely via
> > the internet using the capture card.  I will probabaly need
about 6 -
> >  8 cameras and their respective TV's and inputs on the card.
> >
>
> Hi Matt,
>
> If the capture card has a removeable termination resistor you can
remove
> that and just connect them in parallel. ( The TV would have to be
the last
> device).
>
> Failing that, the "proper" way requires a small amplifier to
drive
two video
> monitors.
>
> However, as I have said before, a lot of video kit will tolerate
incorrect
> video levels and still give a good picture. You could try just
connecting
> them in parallel but DONT have long  leads from the Tee point
otherwise the
> picture will be awful.
>
> EG  CAMERA----------------------TV-----Capture  should be OK
>
> CAMERA-------------------------------------------TV
>                       \--------------------------Capture will be
awful.
>
> A lot depends on the drive capability of the Camera.
>
> I just did an experiment using my Sagem Freeview box as the
source. It
> successfully drove 3 of the Maplin Monitors and a 14" Colour TV
>from
> same composite output. The colour was a bit faded on the TV with
all 3
> monitors connected and one of the monitors was slightly unstable,
but just
> driving any of the 3 devices gave acceptable pictures. Driving two
devices
> the picture looked exactly the same as a direct connection to a
single
> device.
>
> As I said, a lot depends on the camera whether it will drive more
than one
> device in parallel. Shouldnt be done but most of the time you will
get away
> with it. The picture may be slightly darker but you can usually
adjust the
> brightness and bring it back up.
>
> HTH
>
> Keith



UK Home Automation Meet 2004 - BOOK NOW!
http://www.ukha2004.com

http://www.automatedhome.co.uk
Post message: ukha_d@xxxxxxx
Subscribe:  ukha_d-subscribe@xxxxxxx
Unsubscribe:  ukha_d-unsubscribe@xxxxxxx
List owner:  ukha_d-owner@xxxxxxx