=?ISO-8859-1?Q?Freeview_viewers_facing_=A3200_bills_for_4G_fi lters?=

Will 4G transmittters really require that viewers of Freeview fit a
filter to their boxes / t.v.s?

http://www.dailymail.co.uk/news/arti...erference.html

On Sun, 1 Jul 2012 03:09:34 -0700 (PDT), CJB <chrisjbrady@gmail.com>
wrote:

>Will 4G transmittters really require that viewers of Freeview fit a
>filter to their boxes / t.v.s?
>
>http://www.dailymail.co.uk/news/arti...erference.html

This is an old story. A slightly more balanced version is at
http://www.bbc.co.uk/news/technology-18174052.

AIUI those granted 4G licences will require to meet the cost for at
least the first TV. in many cases all that will be needed is a
filter, which will be cheap to buy. I think the problem has been
exaggerated.

What I don't know is whether the filter can be installed at the TV or
if it needs to be fitted to the aerial.

In message
<ae417d0a-aadd-416a-ab93-b50bb5cfad41@3g2000vbx.googlegroups.com>, at
03:09:34 on Sun, 1 Jul 2012, CJB <chrisjbrady@gmail.com> remarked:
>Will 4G transmittters really require that viewers of Freeview fit a
>filter to their boxes / t.v.s?
>
>http://www.dailymail.co.uk/news/arti...erference.html

There was a similar scare when C5 started terrestrial broadcast
umpty-zillion years ago.

And of course, if the issue is interference on Terrestrial TV, then it's
hardly going to be an additional cost for "cable television" as that
article claims!!

The problem seems to be that 4G will use the spectrum that used to be
Channels 61 upwards, immediately above post-switchover DTT. If your
receiver is particularly crap, and you have a wideband or Group CDE
aerial for the higher bands, and it's pointed at a nearby 4G base
station, then an extra low-pass filter might be needed. But TV aerials
can be quite impressive low-pass filters all on their own!

Look at these Group A aerials (in red) for example:

http://www.aerialsandtv.com/_wp_gene...wp72596a28.jpg

Or these Group K ones (in grey):

http://www.aerialsandtv.com/_wp_gene...wp380af5c4.jpg

--
Roland Perry

In message <mc90v79350tfqie3i5laei8jicamrs4g1g@4ax.com>, at 11:34:14 on
Sun, 1 Jul 2012, Scott <newsgroups@gefion.myzen.co.uk> remarked:
>What I don't know is whether the filter can be installed at the TV or
>if it needs to be fitted to the aerial.

It would have to be fitted just before wherever the first electronics is
encountered, which could be a TV or might be a distribution amplifier.
--
Roland Perry

On Sun, 1 Jul 2012 11:56:15 +0100, Roland Perry <roland@perry.co.uk>
wrote:

>In message <mc90v79350tfqie3i5laei8jicamrs4g1g@4ax.com>, at 11:34:14 on
>Sun, 1 Jul 2012, Scott <newsgroups@gefion.myzen.co.uk> remarked:
>>What I don't know is whether the filter can be installed at the TV or
>>if it needs to be fitted to the aerial.
>
>It would have to be fitted just before wherever the first electronics is
>encountered, which could be a TV or might be a distribution amplifier.

So if there is no amplifier (as in my case) it can just be added to
the coaxial lead at the TV? Sounds like a five minute job. How much
will the signal be attenuated?

In message <fqb0v7pn8ots6ts9sutikcan5i7rusoq34@4ax.com>, at 12:08:08 on
Sun, 1 Jul 2012, Scott <newsgroups@gefion.myzen.co.uk> remarked:
>>>What I don't know is whether the filter can be installed at the TV or
>>>if it needs to be fitted to the aerial.
>>
>>It would have to be fitted just before wherever the first electronics is
>>encountered, which could be a TV or might be a distribution amplifier.
>
>So if there is no amplifier (as in my case) it can just be added to
>the coaxial lead at the TV? Sounds like a five minute job.

I would expect so.

>How much will the signal be attenuated?

The wanted signal should not be noticeably, but also remember that with
the Digital switchover the power of the Freeview channels have been
substantially increased.
--
Roland Perry

In message <mc90v79350tfqie3i5laei8jicamrs4g1g@4ax.com>, Scott
<newsgroups@gefion.myzen.co.uk> wrote
>AIUI those granted 4G licences will require to meet the cost for at
>least the first TV. in many cases all that will be needed is a
>filter, which will be cheap to buy. I think the problem has been
>exaggerated.
>
>What I don't know is whether the filter can be installed at the TV or
>if it needs to be fitted to the aerial.

As I understand, it depends on the transmitter from which you receive
your TV signals. If the transmitter channels are in the high 50s an
expensive filter may be required, otherwise something cheaper.

The fitting position may depend on if you have any electronics in the
system (head amps etc.) or not.

--
Alan
news2009 {at} admac {dot} myzen {dot} co {dot} uk

In message <1j4EKvi+gC8PFAzB@perry.co.uk>, Roland Perry
<roland@perry.co.uk> wrote

> But TV aerials can be quite impressive low-pass filters all on their
>own!

But the majority of installers have only been fitting wideband digital
aerials[1] for the past few years.

[1] No such thing as a digital aerial - it's the installers way of
conning people into thinking that they needed a new aerial for digital
reception. It also tends to be shorthand for being a wideband aerial,
even in areas where a grouped aerial would have been a much better
option.

The widebands are the DM log, triboom 46 and log40 results in the
previous links
<http://www.aerialsandtv.com/_wp_generated/wp380af5c4.jpg>.

--
Alan
news2009 {at} admac {dot} myzen {dot} co {dot} uk