Reception mystery

I receive from Waltham. My aerial feeds a TV installation downstairs
and one in my bedroom via a masthead splitter.
Last Thursday I started having problems with the signal breaking up
upstairs. Ivestigation showed that it was the BBC mux causing the
problem, ITV and other channels are OK. The breakup occurs on both the
PVR and on the TV on its own. The downstairs rig has continued to work
satisfactorily. I have tried retuning the bedroom TV and PVR but to no
avail. I have changed the wallplate and two cables to ensure that all
connections are tight, although they worked satisfactorily until last
week, but there was no improvement.
Any ideas on how to proceed greatfully received.

"Peter Johnson" wrote in message ...
I receive from Waltham. My aerial feeds a TV installation downstairs
and one in my bedroom via a masthead splitter.
Last Thursday I started having problems with the signal breaking up
upstairs. Ivestigation showed that it was the BBC mux causing the
problem, ITV and other channels are OK. The breakup occurs on both the
PVR and on the TV on its own. The downstairs rig has continued to work
satisfactorily. I have tried retuning the bedroom TV and PVR but to no
avail. I have changed the wallplate and two cables to ensure that all
connections are tight, although they worked satisfactorily until last
week, but there was no improvement.
Any ideas on how to proceed greatfully received.

Is it just a passive splitter, no power?
Perhaps some water has got in to the cable, or some corrosion in the splitter that or just affecting the bedroom leg.

Assuming you are unable to access the roof yourself, perhaps you could run a cable
from downstairs to upstairs. Unless the received signal is particularly strong you will
probably require a two output amplifier downstairs rather than another passive splitter


--
Graham.

%Profound_observation%

On Tue, 10 May 2011 19:48:00 +0100, "Graham." wrote:


"Peter Johnson" wrote in message ...
I receive from Waltham. My aerial feeds a TV installation downstairs
and one in my bedroom via a masthead splitter.
Last Thursday I started having problems with the signal breaking up
upstairs. Ivestigation showed that it was the BBC mux causing the
problem, ITV and other channels are OK. The breakup occurs on both the
PVR and on the TV on its own. The downstairs rig has continued to work
satisfactorily. I have tried retuning the bedroom TV and PVR but to no
avail. I have changed the wallplate and two cables to ensure that all
connections are tight, although they worked satisfactorily until last
week, but there was no improvement.
Any ideas on how to proceed greatfully received.

Is it just a passive splitter, no power?
Perhaps some water has got in to the cable, or some corrosion in the splitter that or just affecting the bedroom leg.

Assuming you are unable to access the roof yourself, perhaps you could run a cable
from downstairs to upstairs. Unless the received signal is particularly strong you will
probably require a two output amplifier downstairs rather than another passive splitter

It might be worth trying the bedroom PVR downstairs just to make sure
that there isn't a more general problem.

It is just, slightly, possible that the downstairs rig is more tolerant
that the upstairs TV and PVR.

--
Peter Duncanson
(in uk.tech.digital-tv)

On Tue, 10 May 2011 20:44:15 +0100, Peter Duncanson
wrote:



It might be worth trying the bedroom PVR downstairs just to make sure
that there isn't a more general problem.

Tried that to retune it and it was ok. Thanks.
I think the problem must be with the cable to the upstairs which is
20+ years old brown stuff with a joint in. The downstairs run is
direct and newer.
I can't work out why it has failed just now though.

I would say the upstairs cable run is suspect. Possibly water is getting in,
and now it's at the point where reception is affected.


"Peter Johnson" wrote in message
...

I receive from Waltham. My aerial feeds a TV installation downstairs
and one in my bedroom via a masthead splitter.
Last Thursday I started having problems with the signal breaking up
upstairs. Ivestigation showed that it was the BBC mux causing the
problem, ITV and other channels are OK. The breakup occurs on both the
PVR and on the TV on its own. The downstairs rig has continued to work
satisfactorily. I have tried retuning the bedroom TV and PVR but to no
avail. I have changed the wallplate and two cables to ensure that all
connections are tight, although they worked satisfactorily until last
week, but there was no improvement.
Any ideas on how to proceed greatfully received.

On Wed, 11 May 2011 19:06:27 +0100, "David Bolton"
wrote:

I would say the upstairs cable run is suspect. Possibly water is getting in,
and now it's at the point where reception is affected.

I'm getting the upstairs run replaced tomorrow. As I said earlier, I
know that it's old and I know that there's a junction of some sort,
covered in black tape, in the loft.
Could new tree growth 50yds or so away affect/weaken the signal on a
single mux? Where the existing cable is already suspect? When this
started to fall apart there had been no rain for ages.

"Peter Johnson" wrote in message ...
On Wed, 11 May 2011 19:06:27 +0100, "David Bolton"
wrote:

I would say the upstairs cable run is suspect. Possibly water is getting in,
and now it's at the point where reception is affected.

I'm getting the upstairs run replaced tomorrow. As I said earlier, I
know that it's old and I know that there's a junction of some sort,
covered in black tape, in the loft.
Could new tree growth 50yds or so away affect/weaken the signal on a
single mux? Where the existing cable is already suspect? When this
started to fall apart there had been no rain for ages.

Junctions in the loft covered in black tape often are often revelled to be
electrical chock block, or other connection that is unfit for purpose.

One or more MUXs notched out as you report makes me very suspicious.

--
Graham.

%Profound_observation%

Junctions in the loft covered in black tape often are often revelled to be
electrical chock block, or other connection that is unfit for purpose.

I know,
revealed not revelled :-)

--
Graham.

%Profound_observation%

Graham. wrote:
Junctions in the loft covered in black tape often are often revelled to be
electrical chock block, or other connection that is unfit for purpose.

I know,
revealed not revelled :-)

However, such junctions are reviled.

Bill

In article ,
Bill Wright wrote:

However, such junctions are reviled.

Deliver no evil, avid diva, live on reviled.

-- Richard