[Gllug] [OT] TFT displays

[Chris Bell]

On Sun 25 Sep, Adam Bower wrote:
> 

> 
> I have read that they are not broadcasting the new digital channels from
> any transmitters at anything like full power yet, apparently due to the
> risk of causing problems with the analogue channels+interference but
> once the switch over is underway then digital power will be boosted when
> the analogue is turned off.
> 
> Indeed if I compare (perhaps incorrectly, I am not a radio engineer) the
> numbers for Crystal Palace on these 2 pages (first is Analogue, 2nd is
> Digital).
> 
> http://www.bbc.co.uk/reception/transmitters/tv_trans/tv_crystal.shtml
> http://www.dtg.org.uk/retailer/tx_lse.html
> 
> It seems like Crystal Palace is a whopping 1000kW for analogue and each
> digital multiplex gets 20kW... of course not all things are equal. Any
> radio engineers like to explain this?
> 
> (If I compare Talcolneston in East Anglia which is where my television
> comes from right now it claims 250kW for Analogue and 10kW or 5kW for
> the digital channels.)
> 
> Thanks
> Adam

   There may be an upper limit on the total power transmitted by the
aerials. I was told that the Crystal Palace feeders (more like plumbing)
needed to be replaced about every six months because of deterioration,
without trying to melt them by throwing even more power at them.

-- 
Chris Bell

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