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How to improve reception of UK DTT on Irish East Coast
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09-10-2002 12:43am#1
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Yeap, here I am, will help if I can.
Firstly it's location , location, location.
Some areas of North Wexford can be very lucky with presely.
Simple rules apply,a coast view and some height above sea level, help greatly.
In my experience near coolgreaney, signal has been strong enough 7 days out of ten with a basic grid aerial and mast head amp psu etc.
Travel towards Arklow or Gorey down to sea level and things get worse due to high ground on the coastline from Arklow Rock down to Tara hill getting between you and presely.
Your analog signal though on diferent channels than the DTT of course, would have to be coming in at around 70 or 80 db's or so for regular DTT to be there.
Obviously whatever favours having a good analog signal from a tx like presely that does DTT also, favours the DTT signal aswell.
Presely often suffers even in it's best areas over here in the winter months in wet weather, and even if that is only marginally affecting analog it can wipe out some of DTT.
Putting up a twin or quad set of aerials will have a major effect and now that there are more fta channels coming on stream with music and the like and indeed for the excelent BBC news 24 , the cost might be worth it.
Another thing worth noting is that, the Irish version of DTT seems to be on hold,if it launched, your UK DTT signals would be completely wiped out and indeed probably analog presely as well as the same channels were going to be used.
A lot of local aerial installers may not be too familiar with UK DTT and there are some who are fascinated by it! depending on who you use. But regardless they should be able to improve your analog reception depending on what you want to spend.
By doing so there will be a noticeable improvement in your DTT.
As you are already getting DTT some of the time that is a good sign.
Regularally during the summer and this is amazing, I've seen the meter on my ITV digital box reading 3 out of a possible 4 and in green which is top quality.
Of course there would be other days when there is that red dot
You can p.m me if you wish, and I will try to give you more specific pointers.
mm0 -
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That is correct Damo,there was actually a promo advising of the channel change on BBC 1 wales last night, don't know if it was on NI.A lot of the newer ITV boxes will do the update automatically.
There is a programme for increasing strenghts from UK DTT tx's.
As of a month ago, Presely was not on that list
According to the current stuff on the BBC website the presely erp ranges from 0.5 kw to 1kw, whereas Winter hill which I think serves manchester has an erp of 5kw.
Based on whats getting here at present, an erp like that from presely, with the seapath would be a heck of an improvement.
I'd imagine they are still very restricted though with the older technology in terms of interference risks to the multitude of analog tx's.
I don't currently have the ITV box hooked up so , am not up to date on what signal has been like lately but will attack this tomorrow.
mm0 -
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Thanks to madman and zorro2566.
A bit more info and items I picked up from other sources.
Where I live reception from Divis is a good as it can be, I have almost line of sight with the tx - except for the earths curve!!!
The high ground around Newry does no come between the rx and tx sites there is a narrow valley there, in fact I can receive Divis on an indoor aerial to a watchable degree.
All this does not prevent the dreaded High pressure syndrome though during the “Summer”.
For that reason I use the Camlough relay which has one of the highest ERP's of all the north’s relays - 630W, is only about 15 miles from me and gives A1 reception. (I suspect though that the tx aerials are not configured to radiate at that power in southerly direction(eg Downtown Radio, same site) - the relay is almost on the border, and I believe uses such high power so as to counteract the high erp of RTE's Clermont Carn (same ae. group and pol.).
Getting back to DTT - highest power output from Divis now is 2.3Kw and is omnidirectional (I think).
If the plan to up the ERP of all main DTT txs’ goes ahead that may change things.
Anyway I could email forever about what I might pick up, so I will have to get my hands on a DTT converter somehow and see whats’ there, problem is I do not know anyone who has one.
On the subject of relays being equipped for DTT, I understand that DTT will be ok in a lot of areas where an analogue relay was required. This is because the digital video broadcasting standard overcomes the big problem of ghosting - one of the reasons for having a relay at all.
Also DTT txs’ do not need the same power to cover the same area as analogue.
Finally can anyone tell me the actual miles they are from any UK DTT transmitter and can receive it.
Thanks from tvman.
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TVman,
From your description, you may have luck
If you are receiving Divis with an indoor aerial without an amp in normal conditions then , you should have a great chance with the proper grouped outdoor roof aerial and amp.
But do get a good one, it's worth it.
I am receiving Presely at more than 120 miles from the tx-but virtually all of that distance is over a clear sea path which helps a lot.
I can get indoor aerial reception from presely without an amp.
Go for it.
mm0 -
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