Stealing Bill's pictures
 

On Wed, 20 Jan 2010 22:26:09 +0100, J G Miller wrote:

On Wed, 20 Jan 2010 16:49:41 +0000, Peter Duncanson wrote:

For people without technical knowledge that is a perfectly sensible
question.

Do you not think then that it rather ironic that people will ask if
they need a new antenna to be able to receive HD transmissions, but
it appears that an awful lot of people think that if they have a TV
set which is labeled as "HD Ready" that they will be able to watch
HD broadcasts on the Freeview multiplex?

It is ironic but understandable.

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

Stealing Bill's pictures
 

In article , J G Miller wrote:

Do you not think then that it rather ironic that people will ask if
they need a new antenna to be able to receive HD transmissions, but
it appears that an awful lot of people think that if they have a TV
set which is labeled as "HD Ready" that they will be able to watch
HD broadcasts on the Freeview multiplex?

Not really. The television says it's HD ready, the aerial doesn't.

I've seen a lot of headlines recently - probably stirred up by Murdoch -
about Freeview HD being "a scam" because you have to buy a decoder,
but the real scam is calling a TV "HD ready" when all it means is that
the screen is high enough resolution.

It's reminiscent of all those TVs that were advertised as "cable
ready" just because they had 100 channel numbers, which was entirely
useless.

-- Richard
--
Please remember to mention me / in tapes you leave behind.

Stealing Bill's pictures
 

In article , J G Miller wrote:

What I want to know is, if they ever do start broadcasting 3D television
terrestrially, will I need to upgrade my specially priced digital
television aerial to a 3D television aerial? ;)

Just imagine the gain you could get with a 4D aerial!

-- Richard
--
Please remember to mention me / in tapes you leave behind.

Stealing Bill's pictures
 

On Wed, 20 Jan 2010 23:39:37 +0000, Richard Tobin wrote:

Just imagine the gain you could get with a 4D aerial!

Good point.

Would one even be able to watch TV shows before they were scheduled? ;)

However, at the IEEE Explore Digital Library

http://ieeexplore.ieee.org/Xplore/lo...rl=http%3A%2F%
2Fieeexplore.ieee.org%2Fiel5%2F4027217%2F4027218%2 F04027381.pdf%3Farnumber
%3D4027381&authDecision=-203

QUOTE

The Four Dimensional Linear Antenna Arrays

Shiwen Yang; Zaiping Nie

Environmental Electromagnetics, The 2006 4th Asia-Pacific Conference on

Volume , Issue , 1-4 Aug. 2006 Page(s):692 - 695

Digital Object Identifier Â* 10.1109/CEEM.2006.258049

Summary: This paper presents the review of the study on four
dimensional (4D) antenna arrays, a type of antenna arrays which
introduce a fourth dimension time - into conventional antenna arrays.
The analytical theory and some numerical simulation results on their
applications are presented

UNQUOTE

which is cited in the paper

SIMULATION OF TIME MODULATED LINEAR ANTENNA ARRAYS USING THE FDTD METHOD

by S. Yang, Y. Chen, and Z.-P. Nie

Progress In Electromagnetics Research, PIER 98, 175-190, 2009.

available at http://ceta.mit.EDU/pier/pier98/10.09092507.pdf

Stealing Bill's pictures
 

"brightside S9" wrote in message ...
On Wed, 20 Jan 2010 16:49:41 +0000, Peter Duncanson
wrote:

Oh, yes. It must be on a 3D mast, held by 3D brackets, with a 3D coax
downlead (twin coax, one centre for each eye).

There will ned to be three brackets, named, i, j and k.

No you only need i-h and k-h the third bracket is formed by a matrix.

In America the top bracket is thinner of course.

--
Graham.

%Profound_observation%

Stealing Bill's pictures
 

"Peter Duncanson" wrote in message ...
On Wed, 20 Jan 2010 21:02:30 +0000, Glenn Millar
wrote:

On 20/01/2010 15:50, J G Miller wrote:
On Wed, 20 Jan 2010 07:59:56 +0000, Steve Terry wrote:

Using digital coax of course

What I want to know is, if they ever do start broadcasting 3D television
terrestrially, will I need to upgrade my specially priced digital
television aerial to a 3D television aerial? ;)


Probably...

http://www.bbc.co.uk/rd/pubs/whp/whp157.shtml

Interesting. I wonder whether they have considered moving the
polarisation planes through 45 degrees: x rather then +.

There was a discussion on here or, utb a year or two ago about a proposed
DTT system that required receiving aerials of H and V polerasations from the same transmitter,
some sort of diversity IIRC. I suppose if the idea took off the manufactures
would make x/y TV aerials with separate downleads.

--
Graham.

%Profound_observation%

Stealing Bill's pictures
 

I suspect they won't fall foul of Part P as they appear to have just
buried the flex in the wall with a 13amp plug top at the end! As
"experts" though, they would certainly be liable should anyone drill
into that cable as it certainly doesn't adhere to any safe practice
of burying cables that I'm aware of.

Because the cable is fixed I think it will come under Part P. If I run
a cable to the garage fixed to the fence and into some sockets fixed to
the garage wall but put a 13A plug on the house end - that still comes
under Part P.


If it's not a new circuit, not involving a delve inside the CU and not
involving a special area (kitchen, bathroom or remote building) it won't
invoke part P.

Sockets in a remote garage certainly invoke Part P, a socket fixed the the
outside wall of your house spurred off a socket inside wouldn't.

Stealing Bill's pictures
 

Doctor D wrote:


"Ashley Booth" wrote in message
...
Doctor D wrote:


Lots to see (and criticize) on this page
http://www.abaerials.co.uk (click on gallery) starting with the
mains cable running diagonally in the plaster from TV to socket
outlet. They've also nicked one of Bill's pictures. It's about
the only picture that doesn't feature a Triax Unix 52. One size
obviously does fit all!

See if you can spot it:
http://www.wrightsaerials.tv/aerialp...dern/026.shtml

Cheers D

I wonder if they are Part-P registered. If so they should know about
safe zones.

-- Ashley
For Windsor Weather see www.snglinks.com/wx

I suspect they won't fall foul of Part P as they appear to have just
buried the flex in the wall with a 13amp plug top at the end! As
"experts" though, they would certainly be liable should anyone drill
into that cable as it certainly doesn't adhere to any safe practice
of burying cables that I'm aware of.

Because the cable is fixed I think it will come under Part P. If I run
a cable to the garage fixed to the fence and into some sockets fixed to
the garage wall but put a 13A plug on the house end - that still comes
under Part P.

--
Ashley
For Windsor Weather see www.snglinks.com/wx