All posts by Chris S
Below are all of Chris S's postings, with the most recent are at the bottom of the page.
HIgh pressure weather conditions have always caused this problem for viewers on the east coast from time to time .Nothing to do with the change to digital. The power cannot be increased because that would cause interference to other countries . Now that all the same channels except Dave and Quest are on Freesat the best solution is to get a Freesat system which is not affected by high pressure weather.
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High pressure weather affected Tacolneston reception in North Norfolk 29th. I suspect that the pressure enhanced the signal from the oxford transmitter which uses some of the same channels
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the significant event is the very high pressure weather causing interference from normally distant tv and other transmitters. That's why its foggy too. I expect something similar on Tuesday.
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no. The effect was like loss of signal on most channels . Worst on UHF channel 31 . affecting freeview 107 (BBC HDnews) etc . I suspect Oxford because it transmits half its multiplexes on the same UHF channels as Tacolneston at medium power. And is only about 20 degrees off Tacolneston in terms of bearing from central north Norfolk. In a couple of years time the plan is to move Tacolnestons channels away from Oxford
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no. Reception is normal today here . (Cromer area) . the peak high pressure looks more like it will be Thursday.
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The point is high pressure reception can DECREASE the apparent amount of signal received. The local and interfering signals do not necessarily add . Sometimes because interference looks like electrical noise the total signal appears smaller . (technically called reduced signal to noise ratio) At other times the same atmospheric condition that lifts distant signals will kill the local signal.
Note I have an academic qualification in telecommunications . Do not work for any tv service so am not part of the transmitter workers "conspiracy"
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Braintree is quite close to Sudbury . it maybe that com5 is too strong . I would try an attenuator . An alternative is to try to receive your programmes from Crystal palace instead of Sudbury. A wideband aerial would probably pick up Sudbury and crystal palace . Doing a retune to avoid picking up Sudbury you can unplug the aerial when the autotune scan gets to UHF channel 30.
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I notice that very many houses in North Norfolk still have the old group CD aerials . Fine for the basic BBC and ITV channels but anything else such as Dave channel will not be received well.
Note today and most of this week atmospheric pressure is high so interference WILL be quite likely . Which can seem like a problem with Tacolston . BUt Tacolston is actually working fine. I would suggest a wideband aerial is best for Nw of Tacolston as it will cover the present channels and also be ok when the channel frequencies are changed next year.
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People should not retune during a period of poor reception they may well tune into say Sudbury instead of Tacolneston . Then when reception actually goes back to normal they will loose some channels because they wont still be tuned to Tacolneston!
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Tuesday 24 April 2012 11:02AM
A good signal strength with bad or no reception sounds very like the effect of an interfering signal .This could be a local radio transmitter.Not nessearily on ch62 (image interference) .Some boxes may suffer this more than others. Or a tv station on the same channel from a nearby region.