Brian, absolutely superb facility. In view of some of the comments above about compatibility, I've just tried this with Win98SE, Firefox 126.96.36.199, Flash 188.8.131.52, CPU Celeron 366 and it works fine on that, although the overlays could be slightly less opaque; but IE6 & Flash 8 didn't like it the white areas were totally opaque & it eventually crashed!! I think that about sums it up for M$ IE. Are any specific browser plug-ins required? Some observations - Ch.59+ for Mendip doesn't appear; KingsWeston & Ilchester Cresent don't appear unless you are close enough. One thing that baffles me, is the order of the list of Transmitters in the Map & Terrain views, seem to be a bit random ie. not distance, signal strength, bearing or alphabetical. Also in the map view it defaults to the first in that list rather than the strongest signal. Looking forward to the future updates. You might want to consider a couple of other things for future updates if you have time ;) Ability to select Rx height to 10m (compatible to other predictors) Ability to add/remove relays. Keep up the good work & thanks.
However, I suspect the postcode-to-height information may be suspect. For example EX35 6LB should be around 220m (not 17m) and EX35 6LA should be around 170m (not 119m). This (obviously) makes a considerable difference to the predictions especially in hilly areas!
Could I suggest you allow height information to be entered as an option? This would also allow people with mast mounted aerials to get a better prediction.
Might it also be possible to add OS coordinates for more precise location placement too?
What an amazingly quick response - thank you! As for height, I still think being able to enter height would be very useful as there are a lot of people with mast mounted aerials in difficult reception areas especially around here.
John Hunter Friday 23 April 2010 7:16PM Cirencester
I have just tried your reception service level map facility. It was not very helpful: it chose to assume that at GL7 we get our reception from Hannington. We actually get our signal from Oxford! We can only get a usable signal from Hannington under freak conditions.
Chris.SE and Briantist: The 'Existing 81-Site Plan' document lists only the frequencies that will be used for PSB but doesn't explicitly state which one will be used for which multiplex.
"This guide indicates only which frequencies are to be allocated to multiplexes carrying the public service channels (PSB multiplexes) and other (COM multiplexes). Information on which frequency will be used for specific individual multiplexes will be published in the detailed frequency listings for each region."
- under 'Multiplex Names' on page 7.
There's precedent: the 81-site plan gives Caldbeck (Scottish) 22, 24 and 27 but ultimately BBCA got 27- (at 50kW), D3+4 24- (at 50kW) and BBCB got 22-. Chesterfield has 23, 26, 29 but the detailed plan for Yorkshire has BBCA on 26 and D3+4 on 23. (Again, the HD mux got the higher-power frequency!)
In fact, the 81-site plan lists the frequencies in ascending numerical order through the whole document except Ferryside (21, 30, 24). The document history calls out a 'change to Ferryside data' in version 2.0.
So the answer is probably that we still don't really know until Ofcom publishes the detailed Anglia region plan, though Digital UK/DMOL may be driving the plans at this point and thus have more information than Ofcom do.
As you seem to live next door to your local relay, then your equipment is probably tuned to one of the more distant Welsh transmitters for the COM multiplexes and may also be tuned to one of them for the PSB muxes. You may find alternatives in the 800's in your channel/programme list.
Depending on your equipment, it may tell you which UHF channel the multiplex being received is on for a particular programme when you press the 'information' button.
For the PSB muxes, your relay is on UHF Ch.27 for all the BBC channels and UHF Ch.24 for the main ITV, Channel 4 & Five programmes.
If it is any of these that you are losing, then you may have to do a manual tune or programme/channel move if your equipment permits, to get them in the correct programme locations (LCN's) 1,2,3,...etc.
If you haven't got your channels back (ie. assuming that it wasn't a temporary transmitter fault - it seems almost impossible to find out that information these days!!) then it is possible that your equipment has a problem. The most common occurrence is that it can lock-up and fail to respond correctly. Un-plugging from the mains for a short period usually solves most of these. You might be unlucky and have to do a retune as well.
Mike Dimmick, Brian (& Russ): It was not the 81 Site plan that I referred to when I made my comment (unfortunately I can't remember which of their documents it was). I have noted that not all OFCOM documents are updated or done in a timely manner when they are updated. Digital UK seem to have the most recent information and this will no doubt be confirmed when they publish the Anglia plan as Mike has mentioned. I have already stumbled across several Central Region allocations that have swapped since whatever OFCOM document it was that I looked at was published, and these swaps have been confirmed by the Central Region plan as well as what is on Digital UK's site. (That doesn't mean that I'm implying that all the information in Digital UK' s database is 100% correct because it does have odd errors - I'm currently having an argument with them as to whether a part of Bristol is in the Central Region or the West Region - idiots! it's obviously in the West region unless something very strange has happened eg. - major land movement, earthquake etc.)
brian i wrote a comment on one fo the pages asking for help about mine yesterday and now i can't find wehre i worte to get the answer - but i live in SE18 and have no digital reception at all, no radio no tv no t=nothing and even my analogue is fuzzy!!! its hell!
is there anything you can tell me? when i look up crystal palace its workign fine although Ondigital told me that there are engineering works. its not my equipment - my tv is only 5 months old and was working fine until the last week or so - its tuning in all the channels but wotn play them for longer than 20 mins and soemtimes not even that! i have also foudn though that my radio stations on my stereo have gone fuzzy and when i dorve into thamesmead today it was completely fuzzy!
i think there may be something interfering but i can't talk to Ofcom until tues! no tv is driving me mad!
yes i think they are - they mostly use sky though.
my radio in my car is problematic - i have a brand new volvo only 8 weeks old and have had everything checked out by volvo and they say nothing is wrong!
on my tv i can tune my tv to pick up all the stations and all radio stations and it tries really hard to play or shwo me the tv shows - has the blurb that comes up on the tv (channel name, programme playing and the little signal diagram is greyed out) then in about 2 seconds after that it dissapears and says no signal!!
This is an excellent facility, great website - well done all who worked on it. I still have some suggestions for (minor) improvements (I always do) both with respect to the terrain option (but the first affecting several options).
1. The height calculated based on postcode can be somewhat out (inevitably) - and the height based on grid references also (less inevitably, more pragmatically). Potentially enough to make a difference where reception is marginal between two transmitters, especially where hills are close to the home location.(Some) people know their houses height above sea level or can easily find it (some satnavs can be persuaded to give it) so the ablity to input this and override the calculated height would be a useful feature.
2. The terrain graphic could do with a line drawn from transmitter top to location - making it easier to see if there is a clear line of sight, clearly no line of sight, or a marginal sitaution where it is best tested with a signal strength meter.
Clive Lee: I'm assuming your aerial points at Winter Hill. Mux D is running at low power until some time next year (when whatever analogue transmission it clashes with is switched off). There's very little you can do.
Brian, the terrain map really doesn't have enough resolution. I was trying to help Paul Carter on the Wenvoe page and somehow your terrain diagram has missed three hills over 200m between Nant-Y-Moel and Wenvoe (according to Wolfbane's terrain mapping, anyway). As an extreme example, try plugging in CF32 7NA (postcode of the NHS Surgery in Nantymoel) into your system and into Wolfbane and comparing, for example, Llangeinor. Wolfbane reckons the terrain causes a 31dB drop, while your system registers a small blip.
Also, for some reason, the map view defaults to Stockland Hill, which is the furthest away that the site still considers 'in range'. Wolfbane won't even show this as a possibility in the 'DX' view - 34dB loss due to terrain.
All weekend we have been having problems with our tv signal in the Mile End area of east London. Programs will go off air for up to an hour at a time!
I know that other people in the area have suffered the same problems and I was wondering does anyone know who I can contact to report this and find out what's going on?
Would be good to be able to use the map for looking at just freeview signals and also to exclude certain transmitters - e.g. croydon which only transmits c5 but which means all the others report as there being a better transmitter - i.e. it redues the yellow area for the other tranmitters which isn;t right for freeview signals.