Man analyses cause of bad TV reception, finds his TV is de facto radar
frisnit.com
frisnit.com
Is digital TV immune to these analogue problems?
We actually have it worse in the part of North London where I live - we're in a dip, behind a hill, and don't have line of sight on the digital/freeview transmitters. Everyone has cable.
DVB-T uses QAM, which is susceptible to phase problems. However, given that the information is digital, a decent tuner stands a much better chance of filtering out the weaker component. You definitely won't see ghost images: either your bit-error rate is too high for the built-in redundant coding, or it isn't. So either you get MPEG decoding errors, or you don't.
The explanation and method are actually pretty simple but I just wouldn't have thought about it.
Donno anything about the signal analysis part of this, but that's the gist of what I heard.
Which is probably I enjoyed living about 30 yards from that point so much :) Coincidentally, my apartment (flat) was directly above a Sam Smiths pub. Happy days ...
The old analogue terrestrial signals are being turned off region-by-region. Part of the Scottish Borders is already off, with the next switchovers being in August and November in Wales and "Granada", the anachronistic name for the TV region roughly covering the North West of England. Everywhere will be changed over by 2012.
Our system is quite different to that in the US; the four main channels (BBC1, BBC2, ITV and Channel 4) are carried universally by every transmitter, even on relays covering tiny villages of a few tens of people. Rather than getting multiple independent TV stations to change over by a certain date, we just need to go round each region and upgrade all the transmitters to carry four digital multiplexes rather than four analogue channels. (Of course, it's more complicated than this, but that's the gist of what's happening.)
There's a lot of information here: http://www.digitaluk.co.uk/when_do_i_switch
See, Bush was right, we really are all socialists in Europe ;)
The model does explain those painfully dry sitcoms from the 70s and 80s that our PBS imports from you. :)
Alternately, because the law says you have to have one if you have a device capable of receiving TV signals (in the UK).