Vertical or horizontal?

Raistlin · 16th February 2009, 18:19

Definitely a techy question and also car-related (MY car, that is

) Does anybody know please, whether digital TV is specifically horizontally or vertically polarised?

JohnDotCom · 16th February 2009, 18:25

For Digital through Sky or Free Sat via a Dish, then both.
Through a TV aerial again it depends as a few Transmitters,
but digital television signals are transmitted in the horizontal polarized waves and vertical polarized waves from different transmitters.

Raistlin · 16th February 2009, 18:28

Thanks John,

All I need to do now is find out which polarisation in which transmitter areas.

JohnDotCom · 16th February 2009, 18:40

Satellite is different because different stations have either H or V polarisation.
The movement is not seen on LNB as Internal.
UK Digital through a Aerial is normally Horizontal.

Raistlin · 16th February 2009, 18:50

Thanks again John

Departed · 16th February 2009, 18:57

Good site for finding out, here:

http://www.ofcom.org.uk/static/recep...index.asp.html

Pick the transmitter and it will tell you lots of things.

For example if you chose Central, the Sutton Colfield transmitter you will see E/WH

This is group E or Wideband (W) Horizontal. Generally everyone uses wideband these days to get analogue and digital.

Generally main transmitters are horizontal, with low power repeaters being Vertical to reduce interference.

Raistlin · 16th February 2009, 19:13

Great stuff

That's a link for my permanent collection.

Thanks very much.

16th February 2009, 18:19	#1
Raistlin Banned 75 CDT Connoisseur SE Auto Join Date: Nov 2006 Location: Wolverhampton Posts: 8,450 Thanks: 0 Thanked 3 Times in 3 Posts	Vertical or horizontal? Definitely a techy question and also car-related (MY car, that is ) Does anybody know please, whether digital TV is specifically horizontally or vertically polarised?

16th February 2009, 18:40	#4
JohnDotCom * Rover 75 FaceLift Tourer CDTi 170BHP Auto ConnSE 2005 Model Starlight Silver Join Date: Nov 2006 Location: Abergele Posts: 28,735 Thanks: 0 Thanked 6 Times in 5 Posts	Satellite is different because different stations have either H or V polarisation. The movement is not seen on LNB as Internal. UK Digital through a Aerial is normally Horizontal. Last edited by JohnDotCom; 16th February 2009 at 18:42..

16th February 2009, 18:25	#2
JohnDotCom * Rover 75 FaceLift Tourer CDTi 170BHP Auto ConnSE 2005 Model Starlight Silver Join Date: Nov 2006 Location: Abergele Posts: 28,735 Thanks: 0 Thanked 6 Times in 5 Posts	For Digital through Sky or Free Sat via a Dish, then both. Through a TV aerial again it depends as a few Transmitters, but digital television signals are transmitted in the horizontal polarized waves and vertical polarized waves from different transmitters.

16th February 2009, 18:28	#3
Raistlin Banned 75 CDT Connoisseur SE Auto Join Date: Nov 2006 Location: Wolverhampton Posts: 8,450 Thanks: 0 Thanked 3 Times in 3 Posts	Thanks John, All I need to do now is find out which polarisation in which transmitter areas.

16th February 2009, 18:50	#5
Raistlin Banned 75 CDT Connoisseur SE Auto Join Date: Nov 2006 Location: Wolverhampton Posts: 8,450 Thanks: 0 Thanked 3 Times in 3 Posts	Thanks again John

16th February 2009, 18:57	#6
Departed Retired -- Join Date: Jan 2007 Location: -- Posts: 3,785 Thanks: 0 Thanked 4 Times in 4 Posts	Good site for finding out, here: http://www.ofcom.org.uk/static/recep...index.asp.html Pick the transmitter and it will tell you lots of things. For example if you chose Central, the Sutton Colfield transmitter you will see E/WH This is group E or Wideband (W) Horizontal. Generally everyone uses wideband these days to get analogue and digital. Generally main transmitters are horizontal, with low power repeaters being Vertical to reduce interference.

16th February 2009, 19:13	#7
Raistlin Banned 75 CDT Connoisseur SE Auto Join Date: Nov 2006 Location: Wolverhampton Posts: 8,450 Thanks: 0 Thanked 3 Times in 3 Posts	Great stuff That's a link for my permanent collection. Thanks very much.