All posts by jb38
Below are all of jb38's postings, with the most recent are at the bottom of the page.caroline: Giving a clue as to your location (pref post code) would be of considerable assistance, as nothing can be checked regarding the signal you should be receiving without this info.
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Kathryn: Just carried out a check using the post code you provided, indications being that of superior reception being possible to anything previous seen with any of the other codes, this being a good thing in one respect but problem causing in another if tuning using auto-tune, the reason for this being that Belmont now comes into the equation.
The problem is that auto-tuning always starts scanning from the bottom of the entire channel range, slowly travelling upwards locking onto each Mux channel found and storing the programmes from it, then once done travelling on to the next doing likewise on so on. Because you appear to be able to receive Sheffield, Emley Moor, Belmont and possibly two others, this means that when carrying out an auto-tune your TV is liable to store the odd Mux channel from anyone of these other stations if its Mux channel is strong enough for the box to lock onto, storing the stations from it rather than just keeping on the station that you require, being Sheffield.
Lots of people get this problem, although some sets have the option on their tuning menu of being able to select scanning a particular area, but this can be iffy in practice and not always as good as it might appear, so its always best to carry out manual tuning in these circumstances, starting with say BBC1 and using the add channels facility for each additional Mux Channel of the station required.
In your case Sheffield uses Mux Ch's 27 - 24 - 21 - 42 - 45 - 63.
As far as HD is concerned, you might well have possibly been receiving HD from Emley, but for some reason or another it dropped out for a short spell and you just haven't managed to recover it as yet during auto-tuning, possibly because of its lower power not proving enough signal for your TV to lock onto, especially "if" your aerial is pointing at Sheffield.
Anyway, if you see "Set up" on your menu that's where you will (or should) see the options for tuning, that said though, I am aware that some boxes do not allow manual tuning, but best try and find your user manual.
Maybe you could indicate the model number of TV you have.
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caroline: Your post code indicates reception being possible from either Melling(@ 2 miles)or Lancaster(@ 7 miles), Melling being a freeview "light" service meaning limited channels being available, so the full service from Lancaster is your best bet "if" actually receivable, albeit the reception predictor does indicate that it is.
I cant see anything shown engineering wise on these stations so I would have another try at re-tuning, preferable a factory re-tune to blank out anything stored, or just remove the aerial and carry out the first scan without it, that having the same effect of blanking the memory, then replace the aerial plug and re-tune as normal.
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Kathryn: Just a little addition, as HD was your main issue I would concentrate on trying manual tuning purely on the HD Mux channels, storing anything received.
This can be done without scrubbing anything already stored using the "add channels" facility in your tuning menu.
Sheffield HD - Mux Ch21 / Emley Moor HD - Mux Ch39 / Belmont HD - Mux Ch28.
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DavidHufton: But they dont share the same multiplex and thats why the signal strengths can be different, normal main stations using 6 multiplexes with two of them being BBC and the rest commercial concerns.
Freeview "light" stations having limited services because only three multiplexes are involved, two of them used by the BBC, with one being for HD transmissions.
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Mary: As the question is based on reception then for any accuracy your location really has to be known, however in general terms the fact of you being at the 6th floor level puts you at a decided advantage, and so in theory an indoor aerial should work provided the window near to it is facing very roughly in the same direction of the transmitter, so have a look and see what direction any aerials located nearby are facing.
Trial and error usually always applies using these type of aerials, as so many variables attached to positioning applies.
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DavidHufton: Or can I put it another way David, if two different signal strengths are seen on what you are looking at then you are comparing two different multiplex transmitters, so rather than just looking at the signal strengths also look at the multiplex channel numbers (not EPG programme ones) associated with them.
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marie: Thanks for the update Marie and really pleased to hear your good news, something I am certain Tesco likewise will be on receiving your e-mail. Needless to say I feel that the manual will be treasured from now on, just in case!!
Best Regards / jb
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DavidHufton: Are you absolutely positive that your TV / box is picking up BBC from Chesterfield (Mux Ch26) and not Belmont (Mux Ch22) as that is shown on the reception predictor as being very possible at the post code given.
The only reason I mention this is, because its a very common thing to happen when auto-tuning a TV in any area where signals can be received from more that one station, as the receiving device generally locks onto the first Mux channel it finds. (if strong enough!)
Try a signal check to see what Mux channel is shown.
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Saturday 27 August 2011 9:18PM
Sheffield
Kathryn: Just a further bit of info regarding your reception. It seems to be that the further along Crookes you travel the better the reception gets, as a test code of S10 1UA (15 Crookes) gave Emley reception as only being possible on three Mux channels, whereas moving upwards along Crookes through codes of 1UD (181 Crookes) showed 4 Mux channels as good with two zero, then from 214 - 257 Crookes (codes 1TG / 1TE and 1TF) revealed perfect reception being indicated from all six multiplex channels.
So as you will see what you receive very much depends on where you are located within relatively short distances, although no matter where it might be reception is always indicated as being good from the Sheffield transmitter, so try a test using manual tuning on the Sheffield HD Mux channel mentioned, that being Ch21.
That said though, "if" your aerial has been set up for Emley then it will be pointing a little too much to the North at about 337 degrees, whereas using all of Crookes as a reference it should be from 208 / 247 degrees for Sheffield, so with the possibility of the direction angle being out coupled to the polarity (V /H)) being wrong then this would have a negative effect on your signal strength received from Sheffield, but one never knows at such as close range, as these errors have much less of an effect as such.
By the way Emley Moor HD on Mux Ch39 is on low power until September 21st, so even although it does show as being good (reasonably anyway) for reception on a number of test codes, I wouldn't really have too much faith in it.