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faq

Welcome to the Frequently Asked Questions (FAQ page). Below, we have tried to answer the most common questions visitors to this our Web site may have. If you find that your question is not answered on this page, please use the form on our contact page or call us anytime (within reason!) on 0800 132880 01738 634125 or mobile 07846 820915

Q: THE most common question with an aerial installation is “How much?”

A: The simple answer is............... no idea! All installations, like car repairs, are different and a call out is the best way to give a quotation. In the Perth area a quotation is usually free.

Q:The postcode checker tells me I can’t receive freeview!

A: The postcode checker is pretty accurate but not 100%! Give me a call and I can advise, all is not lost!

Or we can install a “freesat” system giving up to 145 television and radio services including the high definition services from the BBC and ITV.

Q: How do TV aerials work?

A: Television waves travel in straight lines rather like light rays and don’t bend much around obstacles. So, wherever you live, your receiving aerial should be outdoors, as high as possible, and in the clear, so that it gets the best direct signal. It is extremely important to use a good quality aerial from a reputable manufacturer to avoid the risk of poor reception. As television reception can vary dramatically over distances of a few feet or even a few inches, the precise location of your aerial can have a big influence on the quality of your picture. Outdoor aerials do not last indefinitely. If reception begins to deteriorate, it could be due to corrosion of the cable connections inside the aerial junction box. The aerial may even have been knocked off alignment or broken by strong winds. Inspect the aerial for mechanical damage, and check the cable downlead to make sure it has not deteriorated or been broken. Sunlight can cause it to become brittle, while the ingress of water causes a large loss of signal to the TV set. Aerials and downleads may need to be replaced more often in exposed, coastal, or industrial areas.

Q: I’ve heard there are six “multiplexes” for freeview digital reception. What does this mean?

A: One multiplex transmits the compressed digital information for say up to eight television stations in the space that only one analogue station occupies! The entire output of say ITV can be transmitted on one multiplex, confused? More info on what’s transmitted visit the dtg site.

Q: What are the digital freeview channel allocations for the Angus (Tealing) transmitter?

A: 1 (BBC): 68   2 (ITV): 66      A: 59     B: 62    C: 56  D: 65. National grid ref: NO394407

     From digital switchover the following changes will occur.......

The first designation for the post-switchover multiplexes was: multiplexes 1 and 2 were prefixed "PSB" (for Public Service Broadcasting) and multiplex B becomes "PSB3". The commercial multiplexes A, C and D became "COM4", "COM5" and "COM6". As switchover the PSB1, PSB3, COM5 and COM6 will switch to 64QAM mode transmission, so all multiplexes will transmit in the 64QAM (2/3) 8k mode.

However, Ofcom now calls the PSB multiplexes BBCA, D3+4 and BBCB, the commercial ones are SDN, ArqA and ArqB. In addition the BBCB multiplex will now, from December 2009, be used for the 256QAM DVB-T2 high definition service. This multiplex MAY also be provided from some transmitters before switchover.
 

site last updated  5th march 2010

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