All posts by KMJ, Derby
Below are all of KMJ, Derby's postings, with the most recent are at the bottom of the page.
Mark Bradley: If there is an option in the tuning menu to choose the system (or similar) select DVB-T2. Try manual tuning on C63. Otherwise your signal at 100% could be too strong, in which case an attenuator will need to be inserted in the aerial feed.
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Mike: Yesterday is encrypted on satellite, so viewing is only possible with the appropriate Sky subscription in place.
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gardoon: If the aerial is still in its correct position and you have checked the cables and connectors you need to make sure that the tuner is storing channels on the correct frequencies for the transmitter that your aerial is pointing to. If the aerial is pointing to Emley Moor (S,rods horizontal) the correct frequencies are C44, C47, C48, C51, C52 and C41(HD). For Idle (NW, rods vertical) the frequencies are C21, C24, C39, C42, C45 and C27(HD). You could even have SDN from Belmont on C30- found during the scan. If your receiver permits manual tuning do a factory reset to clear the channel list then manually insert the correct frequency channels.
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Tony Wilkinson: Digital UK show the power for Stockland Hill currently to be 50kW on the PSB muxes and 25kW which is the full amount planned, despite documentation suggesting that the COM muxes would use 10kW until switchover at Crystal Palace.. It does however show a power increase for the COM muxes on 18th April 2012! The COM muxes at Rowridge commence high power working on the same frequencies as Stockland Hill on the same date.
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Fiona: BBC national DAB from Darvel is currently shown as off air since 08:17 yesterday on a BBC reception report.
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jay: I think this is a result of Rowridge transmitting with both horizontal and vertical polarisation after switchover, this creates problems with data compilation. Such variations to the standard format have to be tweaked manually by Briantist. A line that is missing is SDN, ArqA, ArqB at 50kW applicable to Rowridge HP.
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Trevor: Checking the BBC reception report for Darvel states that both the DAB BBC national mux and national FM services are currently off air since 08:17 yesterday.
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Joe Smith: In fact Eastbourne (Old Town) is shown by Digital UK as radiating at 16watts after switchover, Eastbourne relay is expected to be 100watts. These power levels are both greater than those used by the existing analogue services. (Digital transmitters usually use a fifth of the analogue power to cover the former analogue service area.) This would suggest that rather than protecting the French transmissions, the English signals are being reinforced along the South coast in an attempt to deal with possible interference caused when conditions cause strong signals from France to be receivable in the area.
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len hudson: Since the loss of signal occurs at the same time every day it is most likely to be interference from equipment connected to a time switch. A central heating boiler is often the culprit, but security lighting or heating appliances could also be the cause. You could also try having a radio switched on but slightly off tune at the time the problem occurs and note if the interference is picked up. If it is, walking about with the radio to see where the interference is strongest could help pinpoint the source of the interference.
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Sunday 1 January 2012 4:10PM
Dave Lindsay: Happy New Year. As you rightly say the reason for so many transmitters having out of group frequency allocations for the COM muxes is down to the frequency shortage created by the removal of frequencies from the present plan for auction in the Digital Dividend. Waltham and Belmont were at the bottom of the list when allocations were made for the COM mux frequencies, priority being given to Crystal Palace, Sutton Coldfield and Emley Moor to have in-group frequencies allocated from the few that were available/ not used for PSB muxes in overlapping areas. The solution you suggest for linking aerials to receive Belmont and Kings Lynn signals is probably the cheapest way for domestic installations. A neater but more expensive method using filters for the individual mux frequencies would be more likely on, say, a communal aerial. Worth noting: Mux BBCA from Kings Lynn changes frequency to C40 in 2013, so remains within the range of the diplexers, however Waltham will use C49 for Mux BBCA instead of C61, creating another problem for viewers who have chosen to diplex Waltham signals into their aerial set-up if the crossover channel is between 50 and 52. jb38 could probably give more information on professional solutions to this problem.