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All posts by Dr Basil Polychronopulos

Below are all of Dr Basil Polychronopulos's postings, with the most recent are at the bottom of the page.


First of all I cannot understand why int the coverage map there are lots of grey areas that appear to lie around A -roads and motorways. According to this map my area in Luton is NOT covered with good signal strength. What causes this shadowing effects? Interference or what?
Second as a scientist I would like access to a dull technical description of the new terminology used. e.g. In polarisation: what is Hmax? or H-5.6 db. I am fully conversant with Vertical, Horizontal, circular or elliptical polarisation but the above appears to be new jargon that needs explaining.
What time of multplexing is employed? Certainly not Space. Frequency division? - then the frequency of every channel should be listed. Time division? This would curtail significantly the effective bandwith and would result in shitty quality with fast moving / HD scenes. Could you give me link to a technical description of the jargon (and the bad English - like multiplexes!) or else some references please. Yes I can understand it I have a B.Sc. in Elelctronic |Engineering and a Ph. D. in Space science. Many thanks, Basil PS. Icannot currently receive Ch 63 which according to your chart is on Com 8 at 578.0 MHz.

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