All posts by Michael Perry
Below are all of Michael Perry's postings, with the most recent are at the bottom of the page.
Kenneth Johnson:
At just 2km from the transmitter it is possible that you have too much signal! Please check the signal strengths of the multiplexes you currently have amd report back. You should have between 50% and 85% for SD channels and between 60% and 85% for HD channels.
Any more than that means your TV is 'swamped' by the signals and cannot resolve all of them. The solution in that instance is to fit an attenuator in the aerial cables feeding the first item. If the signal; strengths are less than the lower of those figures then you may have an aerial fault. Start by checking all the connections by unpluggong and examining the plugs and sockets to ensure they are free from corrosion. Then put them back in and check what services you get now.
It may well be worth asking your neighbours who are also using the Lochwinnock transmitter if they are having the same problems. If they are not then it is definitely your system at fault.
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Julia Rand:
Have you asked your neighbours if they have the same problems with reception from Keelylang Hill? If they do not, then it is likely that your system that is at fault. There is no reported work currently on that transmitter so it should be providing normal reception.
The new mobile phone may be causing some local interference so please contact @800 using their website: at800 | 4G & Freeview | 4G interference | 4G Filters | 800 MHz They may be able to help you diagnose the problem if that mobile transmitter is causing the problems for you and your neighbours.
It is also possible that your aerial connections can be causing the poor reception, so please check all of the aerial plugs and sockets carefully.
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Ger:
Please could you tell us what the signal strengths are as reported by your TV set. It is best if the SD channels have between 50% and 85% whilst HD ones should ideally be between 60% and 85%. It would be worth comparing those figures during the day and in the evening while the problems occurs.
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Kenneth Johnson:
I wonder whether the mobile mast between your location and the transmitter may have some bearing? Channel 60 is rather close to the frequensies for mobil;e transmissions. Could you conatct @800 to check whether there is any potential conflict, they can be contacted at at800 | 4G & Freeview | 4G interference | 4G Filters | 800 MHz
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Mr D. Langstone:
Please provide a full post code so that we can identify which transmitter you should be using and what the reception conditions are like.
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liz krauesslar:
You should be using the Hannington main transmitter (but you have posted in the page for Lambourn).
The Hannington transmitter should be giving an excellent signal at your location whereas the Lambourn transmitter is hardly receivable in Great Shefford, Hungerford.
So please check that your TV is correctly tuned to the Hannington signals, look at Which Freeview channels does the Hannington transmitter broadcast? to find the right channel numbers to use.
Please also check that your aerial is aimed correctly at Hannington and that there are no problems with your aerial cables through to the TV set.
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Andy Griffiths:
I, too, live in Trowbridge and there is no problem with either the Mendip transmitter nor the signal reception at my location.
I would suggest you check all the aerial leads and connections as well as checking what the reported signal strengths are for each multiplex. Then you should check that you are tuned to the correct services fro Mendip.
If you provide a full post code we could check whether there are any problems at your location.
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Ashley Woods:
It depends on where you are in relation to your transmitter. If you are very close then a proverbial piece of wet string can be enough - but not reliable. The 'H' aerial is, I presume, either an old Band 1 VHF TV aerial that was used in the days of B&W BBC TV, or it could be a VHF radio aerial or it could be a DAB aerial. If it is the latter then it may well be sensitive enough to get some signals - but I'd be interested to hear what signal strengths you get woith the new TV aerial and the old 'H' aerial, please.
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Mrs Julie Haig:
There are no reported problems nor engineering work at Mendip, so it is likley that you have aproblem with your aerial connections. Start by checking all the plugs and sockets are in good condition by unplugging the cable and then refitting them, that will generally eliminate any corrosion from the contacts that is not uncommon. Then check that your aerial is undamaged and has not moved. Recent strong winds could have moved it slightly. Then check that you are tuned to the correct multiplex for BBC 1 from Mendip, it should be on Channel 49, 698 MHz.
Please then enter your full post code into this website so we contributors can examine the reception conditions at your location. One possibility is that your TV retuned and picked up the wrong source, hence unreliable reception.
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Saturday 18 November 2017 9:51PM
Don:
The effect of moisture in the atmosphere has been well known in technical circles for many years. In the early days of Astra satellite transmissions (around 1989) it was a problem serious enough to recommend larger dishes to minimise the loss of reception due to rain or fog/mist. It was also a known problem with UHF TV reception, especially in 'fringe' areas where the signal strength was poor.
Many RF transmissions are susceptible to the effects of moisture in the atmosphere, not just TV signals.