All posts by Michael Perry
Below are all of Michael Perry's postings, with the most recent are at the bottom of the page.
Jack Owens:
When signals are affected by temparature inversions, such as could be prevalent currently in some areas of the UK, the effects vary dependant on the frequncies of the signals. The COMs are transmitted on different frequencies, as shown at the top of this page, so some are more likely to suffer than others - hence the selective effect on programmes. There is no way of predicting what signals are likely to be affected and it can vary throughout the day too.
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Elly :
There are no known plans for it to be made available anywhere else in the UK on Freeview.
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Lark Stoke (Gloucestershire, England) Full Freeview transmitter
Saturday 20 August 2016 1:41PM
Chipping Campden
Saturday 20 August 2016 1:41PM
Chipping Campden
Tony:
The problem appears to stem from the Lark Stoke site having a Gloucestershire Post Code (GL55 6LS) which suggests it is covered by the Royal Mail sorting and delivery offices in Gloucestershire. However, the Post Code is not a good indicator of which county or local council is responsible for the area, Royal Mail being an entity answerable only unto themselves.
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Brian Springthorpe:
It is worth checking that the flylead feeding the affected TV set is in good condition. This is usually best done by carefully swapping the lead for a new one, they are very inexpensive.
Are the other sets working off the same aerial? Are they fed through a powered splitter?
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R. Mays:
It would be best to ask BT TV that question.
This website is not connected with any broadcaster so does not determine what services are available on any transmitter.
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Richard Newman:
Skriag does not transmit COM7, which is where it would normally be. It was present for the duration of the Olympics on PSB3 but is no longer offered on that multiplex, things having been returned to the normal correct settings since the Olympics finished.
There are many similar questions on this website that have all been answered in a similar way.
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CVhris Welton:
Further to that said by StevensOnln1, it is worth noting that the COM multiplexes are operated on an entirely commercial basis. So if the size of the potential audience served by the Lite transmitter is not large enough to be commercially viable then the broadcasters will not be inclined to pay for the transmission of their channels. Hence the existence of the Lite transmitters.
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Elizabeth:
Further to that said by Richard Cooper, any post code you provide should be the FULL post code and not a partial as suggested by Richard. That will allow contributors to know whether there are any obstructions between you and the preferred transmitter. You may have notices some blue boxes beneath some postings, they are triggered by a full post code only and they help us to help you.
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Sue Johnson:
At your location you should be receiving the Freeview Lite range of channels. There is no fault indicated for the Fishguard transmitter, so the problem likely stems from your own system.
It is worth checking all the aerial connections are reasonably firm and in good condition. If you have a flylead from an aerial wall socket to your TV then it is worth replacing that, they are very inexpensive.
If that all appears OK, then unplug the aerial and perform a retune - it should find nothing. Once completed, plug the aerial back in and do a retune again. It may well find the 'missing' channels again.
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Thursday 18 August 2016 1:50PM
Nedbod:
DAB broadcast with low bit rates is definitely poor compared to 'standard' FM transmissions. To reach anywhere near the same sound quality overall would need a much high sample rate and a much higher bit rate, which takes up so much of the available spectrum that it becomes uneconomic.
Us older (I started experimenting at the age of 8 in 1953) electronics engineers have, for many years, had a saying comparing analogue and digital: Analogue is nearly always right but digital is nearly always wrong. If you think about it, an analogue signal can be affected by noise (often in the form of 'spikes' on the waveform) so you would hear the normal sounds plus the 'clicks' of the spikes. On the other hand, digital has to sample the waveform at a regularity that allows reasonable representation of the original (analogue) waveform. Each sample being a digital numerical representation of the waveform amplitude at the moment of sampling. Between those moments there is no way of representing what the waveform does. Thence the saying that digital is nearly always wrong as it is only correct at the sample points. But then there are restrictions p;laced on what is transmitted to 'squeeze' more services into the available bandwidth, hence the lower bit rates and poorer quality of reproduction.
That's some of the reasons why some who like quality listening are reverting back to analogue methods of recording and playback, e.g. vinyl records, etc.