RE: Re: [OT] 5" B&W monitors

["Keith Doxey" <ukha@xxxxxxxxxxx>]

> -----Original Message-----
> From: matt_miles_uk [mailto:m_miles@xxxxxxx]
>
> 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
the
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



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