All posts by Briantist
Below are all of Briantist's postings, with the most recent are at the bottom of the page.
david: See Local television on Freeview | ukfree.tv - 10 years of independent, free digital TV advice
Salisbury is "phase two" for Local TV.
There is a plan to extend local DAB to Salisbury - http://stakeholders.ofcom….pdf - but no timing at the moment.
| link to this comment |
Dave Lindsay: Thanks for that...
As for (1) I have removed these from the main maps now (for the reasons you specified) but they are retained on the C21 (474.0MHz) before switchover | ukfree.tv - 10 years of independent, free digital TV advice Freeview/Maps/Frequencies page for reference.
As for (2) the "first round" is the 60/61 clearance - refer Freeview news | ukfree.tv - 10 years of independent, free digital TV advice and Freeview news | ukfree.tv - 10 years of independent, free digital TV advice and the big list - 4G mobile | ukfree.tv - 10 years of independent, free digital TV advice .
These are mainly changes that shuffle C61/C62 to C39/C40. I was planning on re-generating the maps when each changed occurred, but it might be sensible (as we know where everything will end up) to generate maps for the final version. Let me see what I can do - it takes a lot of computing time to generate the maps (even when I use an 8-CPU AWS large-memory instance).
The next phase will be the 700MHz band clearance, which will create a LOT more issues - but we don't have a full plan for that one yet, as it will reduce the number of frequencies quite a lot.
I'm just going to write about 4G superhet overloading first...
| link to this comment |
John Baker: It is somewhat in the nature of a fault such as this (unlike planned engineering works) that it won't be fixed until whatever it is that has gone wrong is sorted out.
The oldest TV advice is the best here: do not adjust your set!
| link to this comment |
alex Kwofie: Sorry, but you can't as the satellites do not cover as far south as Ghana. See the Satellite footprint maps | ukfree.tv - 10 years of independent, free digital TV advice page.
| link to this comment |
Richard E: It denotes the selected mast, as there can be more than one mast shown on most maps.
| link to this comment |
r.coupe: This is what you would normally expect, and the documentation for DAB reception often mentions this.
There are several reasons for this, and these range from reception at ground-level often being indoors, whilst high up the reception could be outdoors.
The VHF-band signals propagate though the air well, but if the signals bounce off objects (buildings for example) they become weaker.
The basic "line of sight" for a radio (frequency) receiver is a function of the height of the transmitter AND the receiver's aerial. And whilst L-o-S isn't required for VHF signals, as they propagate "over the horizon", the L-o-S provides a guide to where reception is possible.
Also, remember that digital transmissions tend to result in all-or-nothing. You have perfect reception of the digital bitsteam, or you have nothing at all. This is called the "digital cliff".
| link to this comment |
brian: I copied all the FoI request information here - Freeview news | ukfree.tv - 10 years of independent, free digital TV advice ...
disclosure of the antenna radiation patterns into the public domain could lead to these being available to foreign administrations, which would substantially weaken HM Government's negotiating position with respect to international frequency clearance;
a weaker negotiating position for HM Government may lead to additional cost for the broadcasters (where antenna systems have to be re-built as a result of international coordination) and lower coverage for viewers (where antenna systems have to be restricted in order to protect foreign transmissions); and
the BBC is required to provide coverage of its services on digital terrestrial television to a certain proportion of the population by the completion of switchover and a failure or suboptimal result from international co-ordination may harm the BBC's ability to meet this obligation.
Costs were not an issue. The BBC had the full data and redacted it when sending it to me.
| link to this comment |
Saturday 5 January 2013 6:43PM
Mike Davison: I also not that My Freeview | ukfree.tv - 10 years of independent, free digital TV advice does show you have EM coverage as does My Freeview | ukfree.tv - 10 years of independent, free digital TV advice .
100% spot on with you!