Re: Combining Two RF signals

["Nick Austin" <nick.w.austin@xxxxxxxxx>]

Maplin do a modulator that covers the entire UHF band and is
supposedly quite good, code VH89W.

I would image that any external modulator is likely to be at least as
good as the modulator built into the cable box.

Nick.

On 8/28/06, Mal Lansell <mal@xxxxxxx> wrote:
>
> It's definitely looking like the modulator is the way to go, but I've
> never had much luck in the past finding one of decent enough quality.
> Do you have any recomendations for a brand to look out for?
>
> Thanks
>
> Mal
>
> Keith Doxey wrote:
>
> > Hi Mal,
> >
> > > Unfortunately that doesn't work - the cable carries a weak
version of
> > > the terrestrial channels (albeit not quite strong enough to
avoid
> > > grain-o-vision), and this seems to interfere with the signal
from the
> > > antenna.
> > >
> >
> > In that case the only real option you have is to use an external
modulator
> > fed from the AV output of the cable box. Filtering with simple
passive
> > filters will not attenuate the signals enough to prevent
interference and
> > active filters will get very expensive very quickly.
> >
> > Using an external modulator you have two options for connecting
it up....
> >
> > 1. feed your TV aerial into the modulator and then distribute the
output
> >
> > 2. if it is more convienient, use a passive splitter as a
combiner for
> > terrestrial and modulator and then distribute that.
> >
> > HTH
> >
> > Keith