Hello All

We have recently noticed a big deterioration in the quality of one TV
channel, this has happened to all 3 TV's in the house...is this likely to be
a TV arial problem?

TIA

Stan

We have recently noticed a big deterioration in the quality of one TV
channel, this has happened to all 3 TV's in the house...is this likely to be
a TV arial problem?

Possibly - been windy ?

We`ve also had a fair amount of rain, and I believe damp coax can result
in similar picture degradation, but not always to all channels :-}

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L wrote:

Hello All

We have recently noticed a big deterioration in the quality of one TV
channel, this has happened to all 3 TV's in the house...is this likely to be
a TV arial problem?

TIA

Stan


yes. Or cable.

Or transmitter.

Or fed thereto.

L wrote:

We have recently noticed a big deterioration in the quality of one TV
channel, this has happened to all 3 TV's in the house...is this likely to be
a TV arial problem?

If you are in the south, then there is also a problem with "channelling"
at the moment. This tends to occur during long spells of high pressure
weather. The effect is increase co-channel interference, especially from
French transmitters.


--
Cheers,

John.

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"John Rumm" wrote in message
...
L wrote:

We have recently noticed a big deterioration in the quality of one TV
channel, this has happened to all 3 TV's in the house...is this likely
to be
a TV arial problem?

If you are in the south, then there is also a problem with "channelling"
at the moment. This tends to occur during long spells of high pressure
weather. The effect is increase co-channel interference, especially from
French transmitters.

It also happens on the east coast around Scarborough and Filey
--
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"troubleinstore" wrote in message
...

"John Rumm" wrote in message
...
L wrote:

We have recently noticed a big deterioration in the quality of one TV
channel, this has happened to all 3 TV's in the house...is this likely
to be
a TV arial problem?

If you are in the south, then there is also a problem with "channelling"
at the moment. This tends to occur during long spells of high pressure
weather. The effect is increase co-channel interference, especially from
French transmitters.

It also happens on the east coast around Scarborough and Filey
--
troubleinstore
http://www.tuppencechange.co.uk
Personal mail can be sent via website.
Email address in posting is ficticious and is intended as spam trap

View my items on eBay:-

http://cgi6.ebay.co.uk/ws/eBayISAPI....include=0&user
id=yorkie_8&sort=2&rows=25&since=-1&rd=1


Am in Warwickshire in the Midlands....it's really driving us nuts, but am
loathe to call out expensive TV arial company unless I'm sure that is what
it is.

Thanks for advice guys!

In article ,
L wrote:

Am in Warwickshire in the Midlands....it's really driving us
nuts, but am loathe to call out expensive TV arial company unless
I'm sure that is what it is.

I'm in Herefordshire, not that far south of you
and we are getting the same signal variations,
presumably due to atmospherics. Anyway, the tv
progs are so naff these days that you are not
really missing anything.

--
Tony Williams.

"L" wrote in message
...

"troubleinstore" wrote in message
...

"John Rumm" wrote in message
...
L wrote:

We have recently noticed a big deterioration in the quality of one
TV
channel, this has happened to all 3 TV's in the house...is this
likely
to be
a TV arial problem?

If you are in the south, then there is also a problem with
"channelling"
at the moment. This tends to occur during long spells of high pressure
weather. The effect is increase co-channel interference, especially
from
French transmitters.

It also happens on the east coast around Scarborough and Filey
--
troubleinstore
http://www.tuppencechange.co.uk
Personal mail can be sent via website.
Email address in posting is ficticious and is intended as spam trap

View my items on eBay:-


http://cgi6.ebay.co.uk/ws/eBayISAPI....include=0&user
id=yorkie_8&sort=2&rows=25&since=-1&rd=1


Am in Warwickshire in the Midlands....it's really driving us nuts, but am
loathe to call out expensive TV arial company unless I'm sure that is what
it is.

Thanks for advice guys!

Where I live, in County Durham, the TV signals are so strong that I can pick
them up just by sticking a small jewellers screwdriver or a short piece of
wire into the center pin of the aeril socket. Give it a go and see if you
can still pickup the channels you are having trouble with.
--
troubleinstore
http://www.tuppencechange.co.uk
Personal mail can be sent via website.
Email address in posting is ficticious and is intended as spam trap

View my items on eBay:-
http://cgi6.ebay.co.uk/ws/eBayISAPI....include=0&user
id=yorkie_8&sort=2&rows=25&since=-1&rd=1

Has one of your neighbours got building work going on?
Scaffolding can mess up TV reception.

In article , Tony Williams
writes
In article ,
L wrote:

Am in Warwickshire in the Midlands....it's really driving us
nuts, but am loathe to call out expensive TV arial company unless
I'm sure that is what it is.

I'm in Herefordshire, not that far south of you
and we are getting the same signal variations,
presumably due to atmospherics. Anyway, the tv
progs are so naff these days that you are not
really missing anything.


There is quite an atmospheric lift on the go at the moment which is
leading to enhanced proprogation between the near continent and the UK
which may affect your reception.

It may be that the transmitter you use is a relay station and is
receiving its signal by RBR (Re-Broadcast Relay) which means its
receiving from another transmitter and is being thus affected. You would
be well advised to check with your neighbours presuming they receive the
same transmitter, and if they have the same problem then you can assume
its not the fault of your aerial and receiver.

You could phone around a few local TV shops to see if they have had many
complaints and if they have then its not U but external conditions which
nowt can be done about unless you can control the weather:!....
--
Tony Sayer

tony sayer wrote:

There is quite an atmospheric lift on the go at the moment which is
leading to enhanced proprogation between the near continent and the UK
which may affect your reception.

You could phone around a few local TV shops to see if they have had many
complaints and if they have then its not U but external conditions which
nowt can be done about unless you can control the weather:!....

The quick solution to this is to stick in a freeview box - not affected
by these problems.

(did just that at my mums last night - said co-channel was making C4 and
5 unwatchable at times).

--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

In article , John
Rumm writes
tony sayer wrote:

There is quite an atmospheric lift on the go at the moment which is
leading to enhanced proprogation between the near continent and the UK
which may affect your reception.

You could phone around a few local TV shops to see if they have had many
complaints and if they have then its not U but external conditions which
nowt can be done about unless you can control the weather:!....

The quick solution to this is to stick in a freeview box - not affected
by these problems.

Freeview isn't totally immune to CO-channel as is neither DAB radio. Of
course you'll have to check if your local TX supports D_TV

(did just that at my mums last night - said co-channel was making C4 and
5 unwatchable at times).


--
Tony Sayer

On Tue, 07 Sep 2004 15:49:09 +0100, John Rumm wrote:

The quick solution to this is to stick in a freeview box - not
affected by these problems.

Only if you are in a DTTV coverage area. Vast areas of the country are
not covered.

Don't get fooled by the percentages quoted, they are percent of the
population. Cover London, Birmingham and Manchester and your probably
over 50% on that scale but maybe only 10% of the land area.

No DTTV here, only 4 channels of analogue, no other signals
receivable.

--
Cheers
Dave. pam is missing e-mail

tony sayer wrote:

Freeview isn't totally immune to CO-channel as is neither DAB radio. Of
course you'll have to check if your local TX supports D_TV

True, although assuming you can get a signal from your Tx then it should
perform much better than analogue with both co-channel and multi path
interference. Having said that it has problems of its own that you won't
get with analogue... you pays you money and... ;-)

--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

John Rumm wrote in
:


If you are in the south, then there is also a problem with
"channelling" at the moment. This tends to occur during long spells of
high pressure weather. The effect is increase co-channel interference,
especially from French transmitters.


That's true, and my updated aerails don't help a bit.

However freeview is coming in perfectly, I'm not sure about the long term,
as I rarely use it, if my analogue signal is geed, as it usually is.

Now nearly all channels are unwatchable from bothe transmitters, but
freeview's fine.

However, when I've used it for better quality recording, I've never
recorded anything without some problem cropping up, so I'd only suggest it
if your analogue is poor

mike

In article , John
Rumm writes
tony sayer wrote:

Freeview isn't totally immune to CO-channel as is neither DAB radio. Of
course you'll have to check if your local TX supports D_TV

True, although assuming you can get a signal from your Tx then it should
perform much better than analogue with both co-channel and multi path
interference. Having said that it has problems of its own that you won't
get with analogue... you pays you money and... ;-)

Put up with pictures that aren't as good as analogue ones sometimes
especially when the analogue signals are coming from a main
transmitter


--
Tony Sayer

In article 0, mike
ring writes
John Rumm wrote in
:


If you are in the south, then there is also a problem with
"channelling" at the moment. This tends to occur during long spells of
high pressure weather. The effect is increase co-channel interference,
especially from French transmitters.


That's true, and my updated aerails don't help a bit.

However freeview is coming in perfectly, I'm not sure about the long term,
as I rarely use it, if my analogue signal is geed, as it usually is.

Now nearly all channels are unwatchable from bothe transmitters, but
freeview's fine.

However, when I've used it for better quality recording, I've never
recorded anything without some problem cropping up, so I'd only suggest it
if your analogue is poor

mike

I expect you must be near the south coast somewhere?. This lift has been
on the go for sometime now, the pressure has been around 1034 mb for
quite some time.

Bl**dy weather)
--
Tony Sayer

John Rumm wrote:

The quick solution to this is to stick in a freeview box - not affected
by these problems.

It's only unaffected up to the point at which it falls over completely
(digital cliff effect)! DTT can cope with co-channel analogue TV up to
about the same signal level as the wanted DTT signal (0 dB protection
ratio). It doesn't fare so well with co-channel digital interference
from another TX - which it sees as noise. The failure point there will
depend on the received C/N ratio without the CCI present and will
typically be 20 - 30 dB below the wanted signal.

The transmission spectrum planners aim to protect DTT against such
failure due to 'abnormal' propagation for at least 99% of the time
(averaged over a year or more) as opposed to the 95% of the time figure
used for analogue TV.

Of course with analogue you can see what's going on. CCI is easy to
recognise - but with digital you're unaware of the 'lift' until the
screen goes blank for no apparent reason...

--
Andy

tony sayer wrote in
:

In article 0, mike
ring writes

I expect you must be near the south coast somewhere?. This lift has
been on the go for sometime now, the pressure has been around 1034 mb
for quite some time.

Bl**dy weather)

Not South Coast, mid-Essex. Pressure 1033.

Every year at this time it's the same; it's about time "they" did something
about it.

Even freeview's breaking up now, Sky is fine of course. Only very heavy
rain stops that.

And I've only got a free to air card, I wouldn't pay the money, mumble,
mutter...

mike

On Tue, 7 Sep 2004 21:30:33 +0000 (UTC), mike ring wrote:

And I've only got a free to air card, I wouldn't pay the money,
mumble, mutter...

You don't need a card for "free to air" (BBC and others) you need a
card for "free to view" (ITV1, Ch4 and five).

--
Cheers
Dave. pam is missing e-mail

In article 0, mike
ring writes
tony sayer wrote in
:

In article 0, mike
ring writes

I expect you must be near the south coast somewhere?. This lift has
been on the go for sometime now, the pressure has been around 1034 mb
for quite some time.

Bl**dy weather)

Not South Coast, mid-Essex. Pressure 1033.

Its 1037 here in Cambridge now. Just come back from Stansted airport and
was listening to RADIO 2 from Holland all the way no noise at all!...

Every year at this time it's the same; it's about time "they" did something
about it.


Yep bloody scientist should do summatt about all this hot weather pity
we cant have the same as last Monday(

Even freeview's breaking up now, Sky is fine of course. Only very heavy
rain stops that.

O yes!, doesn't it!...

And I've only got a free to air card, I wouldn't pay the money, mumble,
mutter...


Neither would i... grumble etc...
mike




--
Tony Sayer

On Tue, 07 Sep 2004 21:07:26 +0100, Andy Wade
wrote:

[interference effects on digital TV signals]
Of course with analogue you can see what's going on. CCI is easy to
recognise - but with digital you're unaware of the 'lift' until the
screen goes blank for no apparent reason...

I was surprised that the "digital cliff" is err "wider" than expected:
it's not so much a now you see it now you don't but a varying
disruption which shows up as mass blockiness. I had expected a more
binary works/fails, the current atmospherics show up as unreliability
that comes and goes (prob. due to fading in and out).

As you say, the fact that with analogue signals the cause is much more
visible whereas in the digital world a wobbly BER bar is not as much
fun!


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tony sayer wrote in
:

Every year at this time it's the same; it's about time "they" did
something about it.


Yep bloody scientist should do summatt about all this hot weather pity
we cant have the same as last Monday(

Even freeview's breaking up now, Sky is fine of course. Only very
heavy rain stops that.

BBC Essex this morning said the cochannel in out area is from Scandinavia.

Thats all right then

(screwing up feeble old minces to try and see blond busty bimbos
getting their kit off)

mike

Colum Mylod wrote in
:

I was surprised that the "digital cliff" is err "wider" than expected:
it's not so much a now you see it now you don't but a varying
disruption which shows up as mass blockiness. I had expected a more
binary works/fails, the current atmospherics show up as unreliability
that comes and goes (prob. due to fading in and out).

This is because digital works a bit differently.

I'm no expert (Pye VT14 circa 1960 was my forte), but now they use a sort
of differential signal to save bandwidth by not transmitting picture areas
that don't change (much)from frame to frame.

Total signal loss would give a perfect still frame.

I don't know the details, but it's the basic reason

mike