All posts by Michael Perry
Below are all of Michael Perry's postings, with the most recent are at the bottom of the page.
Simon Allen:
Have your neighbours lost their signals as well?
It is highly unlikely that there is any transmission problem else there would be a great many complaints, not just yours.
I suggest you examine your equipment and all the connections to the aerial. Any aerial plugs should be removed and re-inserted to clear any corrosion from the contacts.
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Tim Brake:
According to the link 'R&TI Service' below your posting (leads to Radio & Television Service the Alston transmitter was off-air between 1100 and 1350 yeasterday. It should all the working correctly now according to the BBC.
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Mark Henderson Burns:
Aim your comments to the broadcaster and not this technical help website.
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StevensOnln1:
I was trying to encourage Syed Shah, and others, to investigate what channels and programmes are available locally to them. Also note that I referred to a 'full HD service' and I believe that not all transmitters provide all the HD services, only those on PSB3. Some transmitters do not provide a COM 7 or 8 service for example.
The key may well be in the equipment he is using, does it have a DVB-T2 tuner?
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Emma:
I congratulate you on your thoroughness. However, you will not need 3 aerials at all, one log-periodic will suffice. That should be aimed at Whitehawk Hill and not Rowridge. If you look at Coverage Checker - Detailed View you will see that the only transmitter providing reasonably good service at your location is Whitehawk Hill. The other listed are too far away for reliable reception.
The frequency changes planned do not affect the coverage of any transmitter significantly, so by using a good log-periodic will allow reception of all current and foreseeable future transmissions. I doubt you will need an amplifier at only 12km from the transmitter.
COM7 and COM8 are likely to cease when the 700MHz changes take place as they were only ever intended as a temporary solution to limited capacity.
Note that there will be a gradual change from DVB-T transmissions to use DVB-T2 encoding, which is much more efficient in usage of available bandwidth as well as allowing more channels and more HD services. So any equipment used should become Freeview HD certified.
If you were ever to consider a guyed mast for your aerial, you will need to discuss with your local planning authority whether you will need planning consent and/or building regulations approval. Best to ask first.
You should always check the reported signal strengths on your TV. The ideal is between 60% and 85%, less is unreliable and more will cause loss of pictures and/or sound (even though you have a strong signal, it can be too strong).
So the situation is not a complicated as you fear. A single simple log-periodic properly positioned and aimed should be sufficient for your needs. I am assuming you are not on a communal aerial. If you are, the aerial system is entirely a matter for the managing agents of the property.
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StevensOnln1:
I was clearly refering to the transmission provided by the available transmitters, I was obviously not referring to the TV set. Not all provide all the HD services, only those carrying COM7 and COM8 have all the HD channels available, none of the Freeview Lite transmitters have those as far as I know. Plus they will be closed down when the 700MHz changes take place. I did not suggest there would be any expansion of the COM7 and COM8 services, quite the opposite.
I fear you have mis-interpreted my comments. I do not believe they will confuse anyone who reads my posting carefully.
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Richard Keirle:
There has been no 're-shuffling' of the Freeview channels for several years. There is a planned change due in the next couple of years to clear the TV transmissions from the 700MHz band to make room for more mobile services. The frequencies allocated to each transmitter site have remained largely unchanged since 2012, but a few services have been added a few years ago on the COM7 and COM8 multiplexes.
Some of the commercial providers change from time to time as their commercial pressures either force a closure or enable a new service to be opened. But the 'new' ones will re-use the existing channels that has been vacated by the closed services. Other commercial services decide to use a different channel in agreement with either Ofcom or Freeview.
So I don't understand why you think the frequencies used keep changing. If you provide a full post code, we can look up what channels are being used by your local transmitter and see whather your reception conditions lead to a variability in your signal.
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Dorothy:
To give any meaningful help we need your full post code please. Then we can look up which transmitter your are using and find out if there are any reception or transmission problems.
Having said that, it is likely that you have a connection problem with your TV set. Please check all the aerial leads and unplug each aerial plug and then re-insert it - that will clear any corrosion on the plug or socket.
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Monday 17 July 2017 10:23AM
Briantist:
Yet another unwanted post has appeared here. Please can you remove them as soon as is possible?