CCTV camera output sharing

["keyvan2r" <keyvan@xxxxxxxxxxxxx>]

I am about to embark on the Geovision / CCTV system that some of you
are working on or about to buy. I have a general question: Can the
output of the camera be split/shared without significant loss of
signal / quality?
More specifically, some of the camera's need viewing (i.e door
entry) and I was planning on feeding outputs to both the geovision
and a monitor. I was planning on a simple BNC T-Piece feeding out
from the camera input. Will that present a porblem?

Thanks,
Keyvan