Home cinema - £180M for 4G Interference solution ...

HomeCinemaBanter (http://www.homecinemabanter.com/index.php)

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- - £180M for 4G Interference solution ... (http://www.homecinemabanter.com/showthread.php?t=71431)

£180M for 4G Interference solution ...

So, is this basically going to be untuned input overload induced by close by
systems or is there some other reason this may occur?

Brian

--
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Note:- In order to reduce spam, any email without 'Brian Gaff'
in the display name may be lost.
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"Terry Casey" wrote in message
...

See link:

http://www.broadbandtvnews.com/2012/...to-fund-4g-tv-
interference-solutions/

or

http://tinyurl.com/86erlnp

--

Terry

£180M for 4G Interference solution ...

"Terry Casey" wrote in message
...

See link:

http://www.broadbandtvnews.com/2012/...to-fund-4g-tv-
interference-solutions/

or

http://tinyurl.com/86erlnp

--

Terry

This sounds like a load of nonsense, working out at over £100 per affected
household.

We have all occasionally heard 3G breaking over into PC's and [landline]
phones when they are close - I can't see why a 4G base station should cause
widespread interference like this.

Even if it is true - a band pass filter costs how much? £7.36p, although
you will need to throw in a couple of coax plugs...

£180M for 4G Interference solution ...

On Wed, 22 Feb 2012 21:01:23 -0000, "R. Mark Clayton"
wrote:

"Terry Casey" wrote in message
...

See link:

http://www.broadbandtvnews.com/2012/...to-fund-4g-tv-
interference-solutions/

or

http://tinyurl.com/86erlnp

--

Terry

This sounds like a load of nonsense, working out at over £100 per affected
household.

We have all occasionally heard 3G breaking over into PC's and [landline]
phones when they are close - I can't see why a 4G base station should cause
widespread interference like this.

Even if it is true - a band pass filter costs how much? £7.36p, although
you will need to throw in a couple of coax plugs...

Can you get these filters already? Can I buy mine in advance? Does
it cause any significant attenuation of the signal?

£180M for 4G Interference solution ...

This sounds like a load of nonsense, working out at over £100 per
affected household.

The DCMS Press Release
http://www.culture.gov.uk/news/media_releases/8865.aspx has the same
(and more detailed) story.
We have all occasionally heard 3G breaking over into PC's and
[landline] phones when they are close - I can't see why a 4G base
station should cause widespread interference like this.

Because as others have explained here before, and Ofcom explained in
their con. doc., they are going to use frequencies closer to DTT Muxes?
As Ofcom said:

"4.4 Our preparatory work for the release of the 800 MHz band has
revealed that there is a significant risk of interference from new
services in the 800 MHz band to some existing DTT users. This risk
primarily relates to transmissions from base stations operated by new
licensees in the lower part of the 800 MHz band being picked up by some
existing DTT receivers in the adjacent band.

and also:

"4.7 Our technical modelling indicates that, even if new licensees
adhered to the TLCs in the Decision, interference to DTT receivers could
still result such that, absent any mitigation, up to 760,000 households
might lose the ability to receive some or all DTT services."
-
Robin
reply to address is (meant to be) valid

£180M for 4G Interference solution ...

"Scott" wrote in message
...
On Wed, 22 Feb 2012 21:01:23 -0000, "R. Mark Clayton"
wrote:

"Terry Casey" wrote in message
...

See link:

http://www.broadbandtvnews.com/2012/...to-fund-4g-tv-
interference-solutions/

or

http://tinyurl.com/86erlnp

--

Terry

This sounds like a load of nonsense, working out at over £100 per affected
household.

We have all occasionally heard 3G breaking over into PC's and [landline]
phones when they are close - I can't see why a 4G base station should
cause
widespread interference like this.

Even if it is true - a band pass filter costs how much? £7.36p, although
you will need to throw in a couple of coax plugs...

Can you get these filters already? Can I buy mine in advance? Does
it cause any significant attenuation of the signal?

Yes - Google it up, that where I got the price from.

It will doubtless cause the usual insertion loss for this sort of thing
(maybe 3dB - same as a couple of joins) but the whole idea is that there is
big loss out of band and very little within it.

OTOH wait and see if you have a problem. Even now DTT is many kW and 4G
(although closer) will be several W when it actually arrives.

£180M for 4G Interference solution ...

R. Mark Clayton wrote:

We have all occasionally heard 3G breaking over into PC's and [landline]
phones when they are close - I can't see why a 4G base station should cause
widespread interference like this.

Even if it is true - a band pass filter costs how much? £7.36p, although
you will need to throw in a couple of coax plugs...

Passive filters can't provide the protection required. The guard band is
only 1MHz.

Bill

£180M for 4G Interference solution ...

In message , Robin writes
This sounds like a load of nonsense, working out at over £100 per
affected household.

The DCMS Press Release
http://www.culture.gov.uk/news/media_releases/8865.aspx has the same
(and more detailed) story.
We have all occasionally heard 3G breaking over into PC's and
[landline] phones when they are close - I can't see why a 4G base
station should cause widespread interference like this.

Because as others have explained here before, and Ofcom explained in
their con. doc., they are going to use frequencies closer to DTT Muxes?
As Ofcom said:

"4.4 Our preparatory work for the release of the 800 MHz band has
revealed that there is a significant risk of interference from new
services in the 800 MHz band to some existing DTT users. This risk
primarily relates to transmissions from base stations operated by new
licensees in the lower part of the 800 MHz band being picked up by some
existing DTT receivers in the adjacent band.

and also:

"4.7 Our technical modelling indicates that, even if new licensees
adhered to the TLCs in the Decision, interference to DTT receivers could
still result such that, absent any mitigation, up to 760,000 households
might lose the ability to receive some or all DTT services."
-
What amazes me is the lack of anticipation (and appreciation) that
re-allocating other services in the UHF TV bands might cause
interference to TV reception.

Tuners in TV sets are highly sensitive, wideband, and were specially
designed to cover the whole of Bands 4 and 5 (and beyond - usually
starting at around 90MHz). Even if they have a modicum of filtering in
order to reject out-of-TV-band signals, they were never intended to work
in the presence of strong in-TV-band signals. It therefore seems pretty
obvious that some additional pre-tuner filtering will be required. These
filters will need a pretty impressive performance if they are going to
effectively reject strong interfering signals which are close to the
required TV channels.
--
Ian