Re: Re: Loftbox Problems

[Kevin Hawkins <lists@xxxxxxxxxxxxxxxxx>]

Just one other point. Is the Loftbox one of those devices that has a
downlink and uplink that are connected in a loop and used to inject
other inline devices (their RF outputs) such that they can be
distributed around the home on the outputs.   If so I have found very
weird issues with this in my similar (not Loftbox) setup.  The length of
that cable is very critical if you have very strong input signals. The
unit was supplied with a short 6" loopback cable and using that the
distribution was horrendous, double imaging, tearing, ghosting ,
drifting secondary images etc. When I replaced it with a still
coiled100m roll of co-ax to simulate the downlink/uplink path it was
perfect.  After install I reduced this to the 50m required (25m down and
back) and had problems with interference again on the BBC2 signal,
adding back another 50m (coiled under the floor) fixed it again.  I
think this may have some interaction with any inline video recorders
that introduce RF signal gain too.   I still get issues if I connect my
DAB aerial input to the box though without attenuation, but as my radio
works OK without it I haven't worried.

Lastly - do check any introduced RF signals (from video players) are on
compatible channels as some will interfere if not setup right. This
seems unlikely as it was working before but just maybe some previously
weak signals are now strong enough to interfere.

Keith's site has all the details and even a caclulator to choose the
best channels to use -
http://www.kat5.tv/taboo.html

Kevin




marcrfuller wrote:
>
> Hey Guys,
>
> OK, that sounds like a plan ! Thankyou !
>
> Off to maplin at lunchtime to see what they've got. I'll post the
> results once I've tried em :D
>
> Cheers
>
> marc
>
> --- In ukha_d@xxxxxxx <mailto:ukha_d%40yahoogroups.com>,
> "Tracey Gardner" <tracey.gardner@...>
> wrote:
> >
> > I'm in agreement with Nigel.
> > You are probably putting too much signal into the box.
> > You should be able to pick up some in-line attenuators from your
> local TV
> > aerial wholesalers and gradually reduce the signal level until
you
> clear
> > your problem.
> >
> > Tracey
> >
> > > The aerial may be too good...
> > >
> > > If the signal is significantly up on what was before you may
be trying
> > > to mix too strong a signal. Try removing the aerial
connection a few
> > > millimeters from the socket to introduce some attenuation
and see
> if it
> > > helps...
> > >
> > > HTH
> > >
> > > Nigel
> > >
> > >
> >
> >
>




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