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Freeview signal/aerial problem
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# 1
DonkeyKong77
Old 11-11-2005, 4:31 PM
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Default Freeview signal/aerial problem

Hi

I thought it would be a good idea to buy a freeview box for a portable tv upstairs - so i did - but i assume, due to the portable aerial, it doesn;t get a strong enough signal to transmit the channels - it finds them ok but there's no picture/sound, or its very blocky.

Is there any equipment that i could buy to solve this, dont really want to fork out to have the main aerial from the roof adapted just for this.

I've seen in dixons that you can get "aerial boosters" but am wary of buying from dixonsesque places as they aren't famed for the customer service, and as i aint sure what will work, thought i'd ask for some advice. There's also things on ebay like "2 way aerail boosters" and "digital aerial boosters" but again not sure what i should be looking for.

Thanks
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# 2
thesealeyboy
Old 11-11-2005, 4:44 PM
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Quote:
Originally Posted by DonkeyKong77
Is there any equipment that i could buy to solve this, dont really want to fork out to have the main aerial from the roof adapted just for this.
Depending on signal strength in your area you may get away with an amplified indoor aerial from somewhere like argos (see this product) which you may get away with, failing that i'd suggest buying a loft mount aerila kit, and just drop the wire down from your loft into the bedroom.

J
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# 3
espresso
Old 11-11-2005, 4:44 PM
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See this thread from a couple of days ago Freeview Problems

If you have a Lidl nearby they have an amplified indoor aerial for 7 on the 14th Nov Lidl advert which may just be enough if you are border line on signal strength.

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# 4
gizmoleeds
Old 11-11-2005, 5:49 PM
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Have you check the box on your downstairs TV (with a roof aerial) to check that you get a good picture there and it is not just that you live in an area with bad freeview/have a defective box? :confused:
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# 5
jon_r
Old 12-11-2005, 8:10 PM
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Default free view reception

go to bbc homepage,then into freeview,do a postcode search to confirm freeview is ok in your area.A strong analogue signal does not guarentee a strong digital one, therefore an indoor aerial is NOT recommended.ALSO an important point the actual channel numbers are slightly different and in some areas a totally different aerial 'group' is required.also the aerial is mounted horizontally or vertically, The group refers to the blocks of channels in the uhf tv band ie 21-37 is group A 37- 50 is group B, 48-66 is group C. etc,.... a booster is only good if the signal is reasonable, below a certain level it will be useless...hope that is of help
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# 6
paul4798
Old 12-11-2005, 11:52 PM
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Quote:
Originally Posted by jon_r
go to bbc homepage,then into freeview,do a postcode search to confirm freeview is ok in your area.A strong analogue signal does not guarentee a strong digital one, therefore an indoor aerial is NOT recommended.ALSO an important point the actual channel numbers are slightly different and in some areas a totally different aerial 'group' is required.also the aerial is mounted horizontally or vertically, The group refers to the blocks of channels in the uhf tv band ie 21-37 is group A 37- 50 is group B, 48-66 is group C. etc,.... a booster is only good if the signal is reasonable, below a certain level it will be useless...hope that is of help
I DID THIS AND IT SAYS NOT AVAILABLE I HAVE LOOKED FOR AT LEAST A YEAR NOW AND STILL NOT AVAILABLE DOES ANYBODY WHO SAYS IT IS NOT AVAILABLE GONE FOR IT AND FOUND IT IS?

THANKS pAUL
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# 7
espresso
Old 13-11-2005, 10:02 AM
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So what did this website tell you about your predicted signal strength and suggested antenna then
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# 8
paul4798
Old 13-11-2005, 4:36 PM
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Quote:
Originally Posted by espresso
So what did this website tell you about your predicted signal strength and suggested antenna then
the following: by the way means nothing to me?

DTT transmitters within "local" range of OS grid reference SE029390
Transmitter 1: BBC 2: Digital 3 & 4 A: SDN B: BBC C: NG Transco D: NG Transco Gp Pol OS grid ref. OD
m Field
dBV/m Distance
miles Bearing
degrees Antenna
(suggestion)
UHF ERP
W AOD
m UHF ERP
W AOD
m UHF ERP
W AOD
m UHF ERP
W AOD
m UHF ERP
W AOD
m UHF ERP
W AOD
m
Keighley 48 100 354 68 100 354 66 100 354 53 100 354 30 100 356 34 100 356 W V SE069444 303 46 4 37 Amplified extra hi-gain
Emley Moor 52 10k 565 40 10k 565 43 10k 565 46 10k 565 50 10k 565 49 4k 565 B H SE222128 256 30 20 144 Amplified extra hi-gain



--------------------------------------------------------------------------------

Notes
The results from this predictor should only be used as a rough indication as to which transmitters might be available at a specified location. Please note that the calculations take no account of local surroundings (e.g. trees and buildings), the directional radiation patterns of some transmitters ( e.g. coastal restrictions) nor sources of interference (e.g. strong adjacents). For points in Ireland, the effect of the intervening terrain (e.g. mountains and valleys) is also currently not included. Where the prediction shows a choice of transmitters giving similar field strengths, it is usually worth considering the closest first.

Please note that for combined analogue and digital reception the choice of a different aerial or even a different transmitter might be necessary: [Link to UK analogue TV reception predictor]

[Link to full table of transmitter information]

Transmitter information copyright BBC, Crown Castle UK, ITC, NTL and SDN 1998-2005. Public domain information only.

Key: Aerial groups: A 21-37 red, B 35-53 yellow, CD 48-68 green, E 35-68 brown, K 21-48 grey, W 21-68 black; Pol = polarisation (H horizontal, V vertical); ERP = effective radiated power; AOD = aerial height above Ordnance Survey datum; OD = site height above datum (metres); Bearing is from Grid North (Magnetic North is a few degrees West of Grid North - check local OS map for present variation and add it to Bearing for precise compass direction)

"Antenna suggestions" are a rough guide only; a minimum height of 10 metres is normally recommended. Where an "amplified extra hi-gain" system is suggested, the minimum would probably be a good multi-director Yagi array with a low-noise masthead amplifier.

Some postcode areas are rather large - better precision is possible using an Ordnance Survey grid reference, if available. Also, some postcodes have not yet been included in the database.

New: the transmitter OS grid references are now hyperlinked to our transmission path predictor. This is an experimental facility which might be liable to failure or other problems during its further development. In particular, the graphical output produced is currently Adobe PostScript , which might not be displayed correctly with certain browsers. To view the output with your browser, it will require a plug-in or helper application such as GhostView or Adobe Acrobat plus Distiller . Alternatively, the output can be saved as a PostScript (.PS) file for subsequent use. It is planned to make a different format available in the future.
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# 9
gizmoleeds
Old 13-11-2005, 4:59 PM
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Quote:
Originally Posted by paul4798
I DID THIS AND IT SAYS NOT AVAILABLE I HAVE LOOKED FOR AT LEAST A YEAR NOW AND STILL NOT AVAILABLE DOES ANYBODY WHO SAYS IT IS NOT AVAILABLE GONE FOR IT AND FOUND IT IS?

THANKS pAUL
Back in the days of OnDigital I was told that my postcode wan't covered by digital. As I had a good picture normally I just ignored them and got it anyway and used it fine (initially with an indoor aerial too - although it did need adjusting for Channel 4).

I just tried the website posted by espresso and it told me I need an "Amplified extra hi-gain" aerial. :confused:

I think these sites tend to be ultra-cautious about advising people of their signal because they don't want them buying the boxes then complaining if they don't work.
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# 10
tigermatt
Old 13-11-2005, 5:08 PM
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A friend of mine needed to buy a signal booster to get a Freeview box to work. Once he bought it, everything worked fine. He bought a TV Aerial kit and dropped the cable down into the bedroom where the box was.
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# 11
2ax
Old 13-11-2005, 8:21 PM
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Quote:
Originally Posted by paul4798
the following: by the way means nothing to me?

Keighley 48 100 354 68 100 354 66 100 354 53 100 354 30 100 356 34 100 356 W V SE069444 303 46 4 37 Amplified extra hi-gain
Emley Moor 52 10k 565 40 10k 565 43 10k 565 46 10k 565 50 10k 565 49 4k 565 B H SE222128 256 30 20 144 Amplified extra hi-gain

~

Key: Aerial groups: A 21-37 red, B 35-53 yellow, CD 48-68 green, E 35-68 brown, K 21-48 grey, W 21-68 black; Pol = polarisation (H horizontal, V vertical); ERP = effective radiated power; AOD = aerial height above Ordnance Survey datum; OD = site height above datum (metres); Bearing is from Grid North (Magnetic North is a few degrees West of Grid North - check local OS map for present variation and add it to Bearing for precise compass direction)
The table format has not come out here, but you can see it on your original. The Keighley 100W transmitter is 4 miles NE of you; Emley Moor's 10kW is 20 miles SE.

They are recommending a rooftop hi-gain aerial; we have that here and the two transmitters are 20 (10kW) and 24 (20kW) miles away, similar to Emley Moor for you; I very strongly doubt that an indoor aerial would be sufficient for you - in fact I'm tempted to get a higher gain one, with more elements.

The channel numbers will determine which of the aerial groups you need - some are tuned to different ranges of channels. It looks like your digital multiplexes run from ch 40 to 52 on Emley Moor; I checked your analogue channels which are on 37 to 51. Then a group B aerial is the one to go for for Emley Moor, which will probably be the better option than the weaker nearer signal of Keighley (group E) - check which way most of the aerials point in your area.

I think you'll have good reception as long as you get, or probably already have, a good enough multi-element aerial.

Last edited by 2ax; 13-11-2005 at 8:28 PM.
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# 12
Amba_Gambla
Old 13-11-2005, 8:27 PM
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TBH, we get half decent reception, but if you shuffle the box around a bit (rest on a few dvds, move forwards/backwards etc - it's hanging off the front of the video recorder at the mo!) then you can get much better reception.....

Just shuffle your box around a bit - we can even use the red button on news 24 now!

we're about 20 miles from Emley Moor Mast too.... (if that has any bearing on anything!!)
Only fools run rapids, say the Indians, but I know this:
as long as there are young men with the light of adventure in their eyes and a touch of wildness in their souls, rapids will be run"

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# 13
malima
Old 13-11-2005, 9:21 PM
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Question

hi pls can any one help me too?
My main tv is just working on a sky signal,we don't have an outdoor aerial,so how can i get my tv to work upstairs?Can i buy an "aerial booster" or something like that.I'd also like preview on it too.
Thanks in advance.
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# 14
gizmoleeds
Old 13-11-2005, 9:39 PM
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Quote:
Originally Posted by malima
hi pls can any one help me too?
My main tv is just working on a sky signal,we don't have an outdoor aerial,so how can i get my tv to work upstairs?Can i buy an "aerial booster" or something like that.I'd also like preview on it too.
Thanks in advance.
For normal TV signals you just need an indoor aerial:

http://www.argos.co.uk/static/Produc...2Bboosters.htm

Like this one

For freeview what you need depends on your proximity to the transmitter - try putting your postcode into this website to see what it says:

http://www.wolfbane.com/cgi-bin/tvd.exe?

Look at the last box on the line of data which comes up.

You will probably need a roof aerial fitting though.
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# 15
malima
Old 13-11-2005, 11:00 PM
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Thumbs up

Thanks very much for your help Gizmo,thats my son's room sorted,now to do my room.
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# 16
DonkeyKong77
Old 14-11-2005, 9:12 AM
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Hi
Mine says i need a "set top antenna" - i assume thats just an indoor aerial.

Although on the second row, it says the suggestion is "log periodic" of which i have no idea what it means.
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# 17
2ax
Old 14-11-2005, 12:12 PM
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Log periodic is a type of wider bandwidth aerial (presumably some of your channels are widely spaced). In looks, the aerial elements taper in length from one end of the aerial to the other, instead of nearly all the same size.
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# 18
tigermatt
Old 14-11-2005, 12:15 PM
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Quote:
Originally Posted by 2ax
Log periodic is a type of wider bandwidth aerial (presumably some of your channels are widely spaced). In looks, the aerial elements taper in length from one end of the aerial to the other, instead of nearly all the same size.
Here's a definition of it: http://en.wikipedia.org/wiki/Log-periodic from WikiPedia.
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# 19
DonkeyKong77
Old 15-11-2005, 8:44 AM
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Quote:
Originally Posted by 2ax
Log periodic is a type of wider bandwidth aerial (presumably some of your channels are widely spaced). In looks, the aerial elements taper in length from one end of the aerial to the other, instead of nearly all the same size.
Thanks - are they easily available? - It's just a set top antenna which is shaped like a "triangle" (apologies for the lack of terminology!) isn't it or does it go on the roof?
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# 20
jon_r
Old 15-11-2005, 5:58 PM
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Default apologies,wrong link

go to bbc home page,type in TV Transmitters,then follow the links you will end up in your region where you can click on either analogue or digital tv, from there it will give you details on transmitters,channels, power and the aerial group required and its polarisation. A log periodic aerial is used to cover the WHOLE of the tv band ie channels 21-68, 21 being the 'long' elements 68 being 'short',but you can buy an aerial to cover 21-37 or 37-68 Log perodic aerial will only work in a really strong signal strength area.
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Last edited by jon_r; 15-11-2005 at 6:06 PM.
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