All posts by KMJ, Derby
Below are all of KMJ, Derby's postings, with the most recent are at the bottom of the page.
Nick: The prediction for reception of the COM muxes from Sudbury at your Woodbridge postcode is variable, with a very low chance of a reliable service for 99% of the time, (zero chance for C56), but a good chance of reliable reception for 50% of the time. It would seem to be possible that you are likely to experience interference from other transmitters at the slightest hint of lift conditions, Waltham and Belmont being the most likely sources. You might find that careful positioning of the aerial might improve the chance of reception, slight raising or lowering of the aerial as well as movement to either side could make a big difference to the level of signal being received.
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Richard: The prediction for reliable reception of C25 from Crystal Palace at your location is not brilliant - officially it is classed as poor. This is due to the risk of interference from Rowridge which shares the same frequency. A check on the William Hepburn's Tropospheric ducting forecast shows slight ducting between London and the South coast for late evening so this could be the explanation for your wobbly signal on SDN. The other possible explanation would be interference from a faulty street lamp which would have switched on about the time in question. It might be of interest, if you continue to have problems with reception from Crystal Palace, that Hannington is predicted to give good reception of the COM muxes at your location.
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Deep: Have a look at which direction the TV aerial is pointing. Roughly, East is Heathfield, West is Midhurst. If any aerials are pointing North it would indicate that reception from Crystal Palace is also posible at your location. Then check that the frequencies stored by your receiver are correct for the transmitter that the aerial points to.
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Deep: I should also have said that the version of the local news on BBC1 would indicate the transmitter being received for mux BBCA, as Midhurst is BBC South, Heathfield is BBC South East. CP is BBC London.
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DREW: The service is available on satellite and cable in all regions, and even on Freeview, some viewers are able to receive signals from areas that have switched over, despite living officially in the Tyne-Tees or Ulster TV regions.
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richard easton: Could you give more information about the location where you wish to receive ITV4, Film4 etc, preferably a postcode, so that a check can be made on the predicted reception in the locality. Further advice can then be given.
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rob reay: Mux ArqB, which carries channel 47 commences transmission from Bilsdale on 26th September 2012 - DSO stage 2. Viewers in the Bilsdale coverage area with an overlap from Belmont or Emley Moor might currently find a usable signal for ArqB from one of those transmitters.
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tim: There are two points to mention with regard to the aerial technician's advice. Firstly, if you receive a very strong signal, or use an amplifier to create one, it is possible to overload the tuner so that it does not see the the required mux, rather like how much a human eye can see with a very bright light shining at it. The second point, regarding interference between signals from Knock More and those from Durris is caused by the the current frequency allocation which puts the COM muxes from Durris on the same frequencies as the PSB muxes from Knock More. Although the two transmitters are roughly at right-angles at your location it is possible that a reflection of the Durris signal is being received. It could also be that trees in the path of the Knock More signal have reduced the level of PSB1 to the point that it no longer drowns out the much lower strength, unwanted signal from Durris. Looking at the predicted reception at your location, it is suggested that you might also be able to receive the PSB muxes from Rumster Forest. This would involve the use of two aerials, diplexed to receive the COM muxes from Knock More for a full set of channels. It is interesting to note that if more spectrum is released for 4G, the frequency arrangement would change, removing the clash between PSB and COM muxes.
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R Mason: Could you give more information? Is this satellite reception or Freeview? If Freeview, in what area are you trying to receive the service? - a postcode is useful for doing a check on predicted reception in the locality. Also what kind of equipment are you using.
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Sunday 1 July 2012 1:30PM
Dave Lindsay: I don't know whether the 800Mhz band was sought because it goes through walls better, or whether it was a case of additional frequencies being required to accommodate the growing use of mobile broadband and the bonus of improved propagation on the soon to be available spectrum became an important factor in making the provision more cost effective for rural areas. It was becoming increasingly obvious that government targets for broadband provision could not be met economically with BT fibre optic cables, so 4G is now the flavour of the year!