All posts by KMJ, Derby
Below are all of KMJ, Derby's postings, with the most recent are at the bottom of the page.
Tim Hodkinson: The Digital UK postcode checker predicts a full service with good reception will be available from The Wrekin after 28th September 2011 when the COM muxes assume their post switchover powers and frequencies.It also predicts that you currently have good reception on the PSB muxes from Cefn Mawr. This of course only applies if the aerial is set for reception from this transmitter rather than receiving it off beam on on aerial set for The Wrekin.
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Joanna: There is no refund on the tv licence if you are able to receive any channels at all.You said you are able to receive the BBC channels which are the only ones paid for by the tv licence. Remember too that in unswitched areas the analogue service is regarded as the one you are expected to receive, the Freeview channels are a bonus. After switchover the PSB transmitters are expected to cover the former analogue service area, with the COM muxes regarded as a bonus which are expected to serve an area at least as good as the low power Freeview service.
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Trevor:There should be no problem for the vast majority of viewers when C61 is cleared for the digital dividend as the new frequency will still be in group C/D. If C49 is chosen at Mendip, Mux ArqB at Wenvoe would have to change first (to C39?). There could be problems however for viewers who have aerials on both Wenvoe and Mendip linked with a diplexer. I do agree with you that the switchover at Mendip was planned badly and running the COM muxes at low power alongside high power PSB muxes has led to many unhappy people.The suggestion that the main channels should be together on one mux was made before switchover began, BBC2 analogue would have been replaced with a mux carrying the PSB channels giving all viewers a basic digital service until switchover.
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David: Do a factory reset to clear the channel list then scan for channels or enter the frequencies manually.Mux SDN which carries ITV3 changed frequency to C42+ on 27th April 2011.
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Phil Tromans: Belmont will carry Freeview HD from 17th August 2011. The Nottingham/Kimberley transmitter at 131 degrees is currently in service and has HD on C21+. Aerials need to be set for vertical polarisation for this transmitter.
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Julie: The Digital UK postcode checker predicts good reception on all muxes from Llanddona. Aerial set for horizontal polarisation at 268 degrees. This would give over 100 channels including radio and text services. You should not need a booster unless you have a very long cable run or the signal is split between several tvs. You might even have too much signal! If it is a set back booster try removing it. However if it is a masthead type with a box close to the aerial and a power supply by the tv you would have to remove both boxes for signals to get through.Failure of either the power supply or mast amp results in no signal. Check your cables and connectors, also check that the freeview box is not on the list of equipment that does not support the 8k mode.If it is on the list you will need a new box.Do a factory reset to clear the channel list before scanning for channels.
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mike fisher: The signals on C25 and C28 are from Ridge Hill.If possible do a manual tune on the set of frequencies you wish to store after first clearing the channel list by doing a factory reset. Note that if you wish to receive signals from Bromsgrove the aerial should be set for vertical polarisation. Ridge Hill, The Wrekin and Sutton Coldfield all use horizontal polarisation.
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mike fisher: On 28th September 2011 the power of the COM muxes will increase to 400W, the same as the present level on the PSB muxes. You will then be able to insert an attenuator before scanning to "lose" the unwanted weak signals. In the meantime if you are not able to perform a manual tune the receiver will find all the signals that are strong enough to store. When an identical mux is found later in the scan the box will either ignore it or with some models replace the one found previously. If a regional variation is detected the second version of the mux is usually placed in the 800s of the channel list, but on some boxes it displaces the mux found first into the 800s (or stores the channels in any random vacant slot).Some boxes now give the option of choosing which region is stored in the normal slots or have a channel swap facility.
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Trevor: As you say it does make life difficult in locations where a compromise position has to be found for the aerial to receive signals on all muxes, or when there are too many transmitters just in range and a null has to be found for unwanted signals. I note that for viewers to the Cirencester relay a frequency change is due to take place on 28th September 2011 when MuxD3+4 is to change to C29.
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Friday 29 April 2011 11:47PM
david: The sustitute channels for C61 and C62 are in most cases C49 and C50 which keeps the frequencies in group C/D.The displaced transmissions formerly on C49 and C50 are usually allocated C39 and C40, keeping them in group B where applicable.