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Interleaved Frequencies maps (old ones)

Maps of the Interleaved Frequencies coverage areas for the UK transmitters

Maps of the Interleaved Frequencies coverage areas for the UK t
published on UK Free TV

These are the maps, supplied by Ofcom, showing the coverage areas for the "Interleaved Frequencies" than can be used for the Freeview Local TV service.

The green areas have good predicted coverage for the "Interleaved Frequencies", yellow is possible coverage.

Note: these areas are considerably different from the normal Freeview coverage for each transmitter.

Update: Ofcom introductory comments

The study considered frequency channels -5 below and +2 above the receive aerial group for the station. Though for the 10 largest stations all channels were considered.

The ERP of main stations has been set at 10kW and relay stations at 1kW. It should be noted that in several cases these powers result in a higher ERP than allocated to the main multiplexes.

Coverage of the chosen channel has been assessed on the basis of the derived template and the use of a 64QAM 2/3 modulation scheme. Availability of mast aperture, mast loading and building space to support the required antennas and house transmitters was not investigated.

Coverage calculations are based on existing broadcast stations and reception via fixed roof top aerials.

The derived UK median templates are designed to protect populated coverage derived by the median method. The derived UK continental templates include Irish and Continental restrictions based on 23dB?V/m at the border.

The exercise has been based on version 5.51 of the UK digital plan and an interpretation of the GE-06 frequency plan for Europe. Coverage of each interleaved channel is quoted in isolation, i.e. only that channel and the v5.5 plan have been considered.

As coverage is based on the template at the planned height and at the maximum ERP, coverage using implemented antennas, heights and actual ERP will be lower.


Crystal Palace





The Interleaved Map for the transmitter is created from three elements. The left circular image shows the UK post-switchover use of the same frequency, the central circular image is the Continental use of the same frequency. These are subtracted from the "normal" coverage area for the transmitter, the right hand image, to create the "Interleaved Frequency" coverage area.



Winter Hill



Black Hill



Sutton Coldfield



Pontop Pike



Emley Moor



Bilsdale



Rowridge



Waltham



Craigkelly



Wenvoe



Belmont



Hannington



Divis



Tacolneston



Sandy Heath



Mendip



Sudbury



Oxford



The Wrekin



Dover



Ridge Hill



Caldbeck



Durris



Angus



Limavady



Knockmore



Rosemarkie



Hemel Hempstead



Brierley Hill



Bromsgrove



Kidderminster



Storeton



Sheffield





Guildford



Reigate



Tunbridge Wells



Malvern



Lark Stoke



Fenton



Pendle Forest



Saddleworth



Lancaster



Keighley



Kilvey Hill



Salisbury



Poole



Whitehawk Hill



Fenham



Bristol Kings Weston



Bristol Ilchester Crescent



Nottingham



Llanddona



Carmel



Olivers Mount



Luton



Midhurst



Preseli



Caradon Hill



Plympton



Stockland Hill



Beacon Hill



Huntshaw Cross



Redruth



Moel Y Parc



Brougher Mountain



Darvel



Rosneath



Bluebell Hill



Londonderry



Heathfield



Selkirk



Bressay



Torosay



Perth



Tay Bridge



Keelylang Hill



Rumster Forest



Eitshal



Balgownie



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Comments
Saturday, 21 May 2011
B
bob davies
12:01 PM

thanks for prompt reply.
i'm trying to pre-config Kaffeine Player in PCLinuxOS - for the two muxes that have too weak a signal here to locate automatically.
They're Hauppage cards that get an initial config file from Germany - but its not fully up to date.
I'll keep trying and maybe install XBMC or MythTV.
Still curious to where that ID info could be found.

link to this
bob davies's 3 posts GB
Briantist
7:56 PM

bob davies: The configuration is in the NIT - the Network Information Table - part of the DVB-T broadcast, your software should be able to read this configuration and use it.

link to this
Briantist's 38,745 posts Owner Owner GB
B
bob davies
11:13 PM

thanks again.
will try to locate + view the file where NIT info is held.
hope this was the correct page to post my question.

link to this
bob davies's 3 posts GB
Sunday, 22 May 2011
Briantist
10:04 PM

bob davies: The NIT is part of the standard DVB-T broadcast, it is how ALL receivers discover the available channels.

link to this
Briantist's 38,745 posts Owner Owner GB
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