800 MHz frequency band
||The examples and perspective in this article may not represent a worldwide view of the subject. (October 2012)|
The 800 MHz frequency band is a frequency band, that encompasses 790-862 MHz.
It is possible that the 800 MHz band can be used from year 2013 to 800 MHz broadband, in Europe. 
Possible interference problems
The reason to the interference problem is that the radio-chain in newer TV-equipment are designed to receive 790-862 MHz (EU channel 61-69). Due to limited guard band between these two services in some cases the LTE 800 signals may cause interference to DTT in EU channel 59 and 60.
This means that strong signals in 800 MHz band, has no problem to make strong signal strength derived limiting or clipping, that is due to overdrive of antenna amplifiers and/or DTT tuners in e.g. flat panels, set top boxes, USB-tuners and digital video recorders.
Depending on the overdrive endurance, the following will happen:
- When forward error correction (FEC) is adequate, the TV-picture is perfect.
- When FEC in periods are not sufficient, there will be pixelation in the picture and/or there will be sound drop-outs in short periods.
- When the signal damage is happening in longer periods and the error correction therefore is not sufficient, you will have a black TV-screen.
Overdriving will not only damage one channel. Actually all signals passing the unit will be damaged, while the unit suffers of overdrive.
Essentially there are two types of interference sources in the 800 MHz band: The LTE base stations (which are usually far away from the TV equipment) and the mobile terminals which are sometimes close to TV equipment.
For the time being there are not many terminals in the European market that use the LTE 800 frequency band.
868 MHz interference
System that use the 868 MHz-band (868 MHz - 870 MHz), for example, thermostats, fire systems, burglar systems, and DIN-transceivers will have more or less difficulty communicating when there is a strong 800 MHz broadband transmitter nearby. 
- May 14th, 2010, intomobile.com: Europe’s 800 MHz band = America’s 700 MHz band; 4G has a long way to go Citat: "...Last week the European Commission announced that they’ve chosen 800 MHz as a standard to introduce mobile broadband across the continent..."
- 16 Feb 2012, techeye.net: EU demands freeing up 800 MHz spectrum by 2013 Quote: "...to ensure a comprehensive roll out of high speed mobile broadband..."
- 15 November 11, computerworlduk.com: EU rules on radio spectrum ignore interference issues, group claims Quote: "...Under the RSPP, all EU countries must make the 800MHz band available for wireless broadband services by January 1, 2013...However, newcomers to the 800MHz band that "speaks loudly" could drown out other sorts of communications being executed by consumer equipment (such as television tuners or cable modems)..."
- 2 June, 2011, ispreview.co.uk: 760000 UK Households Could Lose Digital TV Due to Superfast Mobile Broadband Quote: "...Ofcom warns that some situations could be too difficult or costly to fix and suggests that it may be "preferable to maintain the consumers’ access to TV while accepting the loss of the DTT service". In other words, you'd (about 30,000 homes) have to fork out for a satellite or cable service..."
- rfdesignuk.com: LTE 800MHz 4G introduction in Europe and interference to the 868MHz SRD band. Frequently asked questions Quote: "...Q4 What types of 868MHz SRD are prone to 4G interference, is it only low cost receivers?...Consequently, almost all receiver types across a broad range of complexity and cost, will suffer significant degradation in areas where 4G products are in operation..."