Bizarre reception problem - any ideas?

I have discovered that I lose BBC News HD and the other COM7 stations
when the Blu-ray player is switched on. The TV shows 'No signal'.
Other HD channels are unaffected. When the Blu-ray player is switched
off signal strength is about 96% and quality 100% so this is not a
case of marginal reception. Can a Blu-ray player interfere with TV
reception?

"Scott" wrote in message
...
I have discovered that I lose BBC News HD and the other COM7 stations
when the Blu-ray player is switched on. The TV shows 'No signal'.
Other HD channels are unaffected. When the Blu-ray player is
switched
off signal strength is about 96% and quality 100% so this is not a
case of marginal reception. Can a Blu-ray player interfere with TV
reception?


Com7 is much lower power than the main muxes on any Tx site, plus are
you receiving Com7 from the same source as your main muxes - you don't
say where you are.

Blu-ray players, like most else, are just computers that think they
are disc players so can radiate interference, most often from the
switched mode power supply. More likely however it is being directly
received either by the TV or on the aerial tail connected to it. If
you are using a ready-made tail that likely has only a braid cover try
replacing it with a tail made of PF100 or similar that has a foil
screen as well.



--
Woody

harrogate3 at ntlworld dot com

On 21/02/2015 08:49, Scott wrote:
I have discovered that I lose BBC News HD and the other COM7 stations
when the Blu-ray player is switched on. The TV shows 'No signal'.
Other HD channels are unaffected. When the Blu-ray player is switched
off signal strength is about 96% and quality 100% so this is not a
case of marginal reception. Can a Blu-ray player interfere with TV
reception?

Is your Blu-ray player SCART connected?

My TV will automatically switch from aerial to SCART if a particular
SCART pin is raised. (I think it might be pin 8 bit I CBA to look it
up). Your TV might switch like that if your player raises the
appropriate pin.

If your player is not at that time displaying anything on-screen, you
would then get a No Signal message. When you switch off the player, the
pin drops and the TV set would switch back to aerial.

Jim

On Sat, 21 Feb 2015 10:11:09 +0000, Indy Jess John
wrote:

On 21/02/2015 08:49, Scott wrote:
I have discovered that I lose BBC News HD and the other COM7 stations
when the Blu-ray player is switched on. The TV shows 'No signal'.
Other HD channels are unaffected. When the Blu-ray player is switched
off signal strength is about 96% and quality 100% so this is not a
case of marginal reception. Can a Blu-ray player interfere with TV
reception?

Is your Blu-ray player SCART connected?

My TV will automatically switch from aerial to SCART if a particular
SCART pin is raised. (I think it might be pin 8 bit I CBA to look it
up). Your TV might switch like that if your player raises the
appropriate pin.

If your player is not at that time displaying anything on-screen, you
would then get a No Signal message. When you switch off the player, the
pin drops and the TV set would switch back to aerial.

My only remaining SCART connection is fed through an adaptor that has
Pin 8 cut, because of this very nuisance. Unfortunately Pin 8 also
handles widescreen switching so I have to do that manually, but I very
rarely use it at all now, and eventually it'll go.

But - have BluRay players even got SCART outputs? What would be the
point of an SD output on an HD player?

Rod.

In article ,
Roderick Stewart wrote:
On Sat, 21 Feb 2015 10:11:09 +0000, Indy Jess John
wrote:

On 21/02/2015 08:49, Scott wrote:
I have discovered that I lose BBC News HD and the other COM7 stations
when the Blu-ray player is switched on. The TV shows 'No signal'.
Other HD channels are unaffected. When the Blu-ray player is switched
off signal strength is about 96% and quality 100% so this is not a
case of marginal reception. Can a Blu-ray player interfere with TV
reception?

Is your Blu-ray player SCART connected?

My TV will automatically switch from aerial to SCART if a particular
SCART pin is raised. (I think it might be pin 8 bit I CBA to look it
up). Your TV might switch like that if your player raises the
appropriate pin.

If your player is not at that time displaying anything on-screen, you
would then get a No Signal message. When you switch off the player, the
pin drops and the TV set would switch back to aerial.

My only remaining SCART connection is fed through an adaptor that has
Pin 8 cut, because of this very nuisance. Unfortunately Pin 8 also
handles widescreen switching so I have to do that manually, but I very
rarely use it at all now, and eventually it'll go.

But - have BluRay players even got SCART outputs? What would be the
point of an SD output on an HD player?

because some people's budgets don't allow them to buy everything new at
one. BluRay this year, new TV next.

--
From KT24 in Surrey

Using a RISC OS computer running v5.18

Scott wrote:
I have discovered that I lose BBC News HD and the other COM7 stations
when the Blu-ray player is switched on. The TV shows 'No signal'.
Other HD channels are unaffected. When the Blu-ray player is switched
off signal strength is about 96% and quality 100% so this is not a
case of marginal reception. Can a Blu-ray player interfere with TV
reception?

It's fairly common for TV peripherals to radiate hash that can degrade
reception. Try using a good quality aerial lead, check the screen
connections inside the coax plugs, check the screen connection is tight
and clean, and move the aerial lead away from the player and its mains
lead. It's worth trying daft things like temporarily powering the player
from a mains extension plugged in some distance away, or using a longer
HDMI lead. Also try moving the player about. More than once I've had to
show the customer the exact position on the shelf the VCR/etc has to be
to prevent interference.

We find it is usually the lower powered muxes that show up this sort of
fault, in fact we had one the other week where the guy was assuming he
needed a a new ae for HD!

Bill

Has it got an aerial through connection, and does it record as well as
play? Otherwise I'd suggest its n just interference being radiated from its
systems to the tuner or its aerial.
I can remember we used to have a Sony VCR that when on it put crap on the
fm band and stopped allbut strong stations being received, so its not a new
issue by any means. Sony eventually modified the psu.
Brian

--
From the Sofa of Brian Gaff Reply address is active
"Scott" wrote in message
...
I have discovered that I lose BBC News HD and the other COM7 stations
when the Blu-ray player is switched on. The TV shows 'No signal'.
Other HD channels are unaffected. When the Blu-ray player is switched
off signal strength is about 96% and quality 100% so this is not a
case of marginal reception. Can a Blu-ray player interfere with TV
reception?

On Sat, 21 Feb 2015 08:55:44 -0000, "Woody"
wrote:


"Scott" wrote in message
.. .
I have discovered that I lose BBC News HD and the other COM7 stations
when the Blu-ray player is switched on. The TV shows 'No signal'.
Other HD channels are unaffected. When the Blu-ray player is
switched
off signal strength is about 96% and quality 100% so this is not a
case of marginal reception. Can a Blu-ray player interfere with TV
reception?


Com7 is much lower power than the main muxes on any Tx site, plus are
you receiving Com7 from the same source as your main muxes - you don't
say where you are.

Yes - Blackhill.

Blu-ray players, like most else, are just computers that think they
are disc players so can radiate interference, most often from the
switched mode power supply. More likely however it is being directly
received either by the TV or on the aerial tail connected to it. If
you are using a ready-made tail that likely has only a braid cover try
replacing it with a tail made of PF100 or similar that has a foil
screen as well.

Problem there is the coax leads to the aerial and I was advised to
avoid joints. Can I retrofit the foil?

On Sat, 21 Feb 2015 10:11:09 +0000, Indy Jess John
wrote:

On 21/02/2015 08:49, Scott wrote:
I have discovered that I lose BBC News HD and the other COM7 stations
when the Blu-ray player is switched on. The TV shows 'No signal'.
Other HD channels are unaffected. When the Blu-ray player is switched
off signal strength is about 96% and quality 100% so this is not a
case of marginal reception. Can a Blu-ray player interfere with TV
reception?

Is your Blu-ray player SCART connected?

No - HDMI lead.

My TV will automatically switch from aerial to SCART if a particular
SCART pin is raised. (I think it might be pin 8 bit I CBA to look it
up). Your TV might switch like that if your player raises the
appropriate pin.

If your player is not at that time displaying anything on-screen, you
would then get a No Signal message. When you switch off the player, the
pin drops and the TV set would switch back to aerial.

That would account for loss of all TV, not for loss of one multiplex
only.

On Sat, 21 Feb 2015 12:33:59 +0000 (GMT), charles
wrote:

In article ,
Roderick Stewart wrote:
On Sat, 21 Feb 2015 10:11:09 +0000, Indy Jess John
wrote:

On 21/02/2015 08:49, Scott wrote:
I have discovered that I lose BBC News HD and the other COM7 stations
when the Blu-ray player is switched on. The TV shows 'No signal'.
Other HD channels are unaffected. When the Blu-ray player is switched
off signal strength is about 96% and quality 100% so this is not a
case of marginal reception. Can a Blu-ray player interfere with TV
reception?

Is your Blu-ray player SCART connected?

My TV will automatically switch from aerial to SCART if a particular
SCART pin is raised. (I think it might be pin 8 bit I CBA to look it
up). Your TV might switch like that if your player raises the
appropriate pin.

If your player is not at that time displaying anything on-screen, you
would then get a No Signal message. When you switch off the player, the
pin drops and the TV set would switch back to aerial.

My only remaining SCART connection is fed through an adaptor that has
Pin 8 cut, because of this very nuisance. Unfortunately Pin 8 also
handles widescreen switching so I have to do that manually, but I very
rarely use it at all now, and eventually it'll go.

But - have BluRay players even got SCART outputs? What would be the
point of an SD output on an HD player?

because some people's budgets don't allow them to buy everything new at
one. BluRay this year, new TV next.

My Blu-ray player is not fitted with a SCART outlet. I wonder how
many are.