|If Scotland votes Yes, what would happen to Free TV in the rest of the UK?||1|
|2050 Tube Map||2|
|A bakers dozen of changes: Freeview channel number changes from 3 September 2014||3|
|BBC Productions: will it be Arqiva mark two in 2017?||4|
|12th birthday: six improvements to UK Free TV||5|
|50th birthday: guest RDI blog||6|
|Around the Bend?||7|
|DTG Summit: Freeview 700 MHz band for 4G very likely, BBC pay-Freeview not||8|
|New Freeview and Freesat channel TruTV to start soon||9|
|Christopher Reid Hi, could you tell me if aerial mast||1|
|bashful Sorry if posting the same question but I too||2|
|James Robinson It will be Sandy Heath. This was an am||3|
|Dave Lindsay patricia: Bring up the signal strength s||4|
|Tony Martin James: 25 Cambridge Transmitter. I assume||5|
|Mike Davison patricia: I have no experience using BTs||6|
|Briantist Final map thoughts On my way back from||7|
|Briantist Can I just say that Im sorry to everyone wh||8|
|David Parker I live in Milton Keynes and receive Free||9|
|patricia Mike Davison: we have BT infinity broadband||10|
|Freeview reception predicton||1|
|All radio transmitters||2|
|All free-to-watch channels||3|
|Feedback | Feedback||4|
|Can I stop paying Sky and use my satellite receiver to get Freeview ?||5|
|My ITV/C4 Freeview channels have disappeared - what can I do? Is it my SCART cable?||6|
|Crystal Palace (Greater London, England) digital TV transmitter||7|
|What can I do when my Sky Digibox says 'No Signal' or 'Technical fault'?||8|
|My Freeview box has no EPG, is blank on FIVE, ITV3, ITV4, ITV2+1, has no sound or the channel line up is wrong||9|
|Can I stop paying Sky and use my satellite receiver to get Freeview ?||1|
|My Freeview box has no EPG, is blank on FIVE, ITV3, ITV4, ITV2+1, has no sound or the channel line up is wrong||2|
|What can I do when my Sky Digibox says 'No Signal' or 'Technical fault'?||3|
|Can I use my ex-contract sky digital satellite receiver to get Freeview channels?||4|
|Can I receive British Eurosport for free?||5|
|My Sky box has a "no signal message" - what do I do?||6|
|How do I change the RF output channel on a Sky Digibox?||7|
|My high gain aerial can't get all the Freeview channels I expected||8|
|How can I get Channel 5 on Sky in Ireland?||9|
|How can I watch Channel 4 and five on satellite if I have no card or a free-to-view card?||10|
| Darwen |
TV Off Air from 10:00 today to 1...
| Droitwich |
LW: Radio 4 LW Weak Signal from 1...
| Great Yarmouth |
TV Off Air from 11:38 today to 1...
| Oakeley Mynd |
TV Reduced Quality from 05:01 to...
On each transmitter information page, there is a three-line description for each multiplex that lists the configuration used.
The first example shown here shows the new mode being used for the commercial multiplexes:
64QAM shows the number of "symbols" that are transmitted within each subcarrier, in effect in 8x8 positions. 8K is the number of subcarriers (which is actually 6817) used within the 8MHz UHF signal. 3/4 (three quarters, or 0.75) in this example is the amount of "forward error correction" used.
The second line shows the bitrates provided - in this example 27.1 megabits (million bits) per second.
The third line indicates the transmission standard used - DVB-T and the type of video encoding used, in this case MPEG-2.
The second example is from the Winter Hill transmitter, where a local television multiplex is broadcast:
Here the QSPK is a 2x2 position system, and results in only 6.0 megabits per second.
The third example shows the standard post-switchover configuration for the public service transmitters.
PSB1 and PSB2 use 64QAM, 8K (6817) but with forward error correction of 2/3 (two thirds, or 0.67). The use of this form of error correction provides 24.1 megabits per second.
PSB3 is used for Freeview HD, this showing on the third line as DVB-T2 MPEG4. DVB-T2 is a more advanced transmission system, with a number of enhancements over DVB-T. MPEG4 is also a newer, more efficient video encoding system.
The use of a 256QAM (16x16) symbol positions and 32KE (that's 27841) subcarriers results in a broadcast of 40.2 megabits per second.
The final example is from Rowridge, a transmitter in a pre-switchover state:
The low power digital transmissions use 2K (1705) subcarriers with a 16QAM (4x4), which results in 18.1 megabits per second per multiplex.