All posts by Briantist
Below are all of Briantist's postings, with the most recent are at the bottom of the page.
John Hunter: It's at the bottom of the map...
Freeview interference from 800Mhz 4G 2013- | ukfree.tv - 10 years of independent, free digital TV advice
"[6] number of multiplexes in C52-C60 range when 4G 800MHz services start [R] Retune only ".
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John Nottage: A retune will happen May 2013 to clear C62. When 800MHz 4G mobile broadband services start there will be 2 multiplexes in C52-C60 range: C55: PSB1 C59: PSB2
You may or may not need a filter - it's complicated and we don't know yet who will run the 4G - see How do I know if the 4G broadband will overload my Freeview? | 4G mobile | ukfree.tv - 10 years of independent, free digital TV advice .
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Stuart Owens: Just to add to the above, the issue is also that digital TV receivers with superheterodyne circuits suffer from the N+9 problem - there is a distinct interfere problem nine 8MHz channels away - so C52, C53, C54 and C55 are *MORE* likely to have problems.
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TV masts are not normally used for 2G/3G services, as they are not really in suitable locations. Here's the Brighton and Hove comparison of sites as an example:
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ian from notts: Yes, you will need to know where the masts are.
But we won't know this until the capacity is won and the winners select their locations.
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John Robinson: In addition, the "fourth" set of frequencies have been the "digital dividend", which are about to be used for 4th generation mobile broadband .
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carol lewis: If you mean the "red button" service, rather than Ceefax, you can't yet get this on the BBC One HD services.
You will need to switch to a standard-definition BBC TV channel and press RED.
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Just a note to say that http://www.comreg.ie/_fil…xlsx says SV2 broadcasts on both C33 and C58.
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Monday 28 January 2013 8:40AM
ian from notts: I tried to make this all clear in the How do I know if the 4G broadband will overload my Freeview? | 4G mobile | ukfree.tv - 10 years of independent, free digital TV advice article, there are two ways you can be effected.
1. "direct" interference - which is a mast transmitting on a signal on a frequency near to one you want for Freeview; and
2. "indirect" interference - which is an overload condition and happens regardless of the frequency you are going for.
The masts will all be using C61 to C64 for downlinks, the phones will be using C66-C69 for uplinks. C65 will be held clear.
The six winning operators will get 5MHz each.
Until we know who wins which 5MHz, and then where and when they deploy their base stations, will we know better who might be effected.
However, until then, the above maps is the best guide as to the "general areas" where there might be issues.