[BC] Overcrowding & noise floor on AM

[Robert Meuser]

Phil

While I stated earlier that there were ways to improve the antenna 
match, I can tell you that at least one 'state of the art' European LW 
TX plant has 2 khz response on the upper sideband and around 1 K on the 
lower. Analog broadcasting works there becasue the radios are so bad to 
begin with.  Digital will take a bit more finesse.

R


Phil Alexander wrote:

>On 19 Mar 2007 at 9:47, Jim Tonne wrote:
>
>  
>
>>The antenna bandwidth "down there" starts to get "iffy"
>>as you go lower and lower in frequency (below 500 kc).
>>So there would be a set of compromises between 
>>upper-end audio limit, operating frequency and tower 
>>height.  I'm not saying   not doable   but there would be
>>some problems in those areas.
>>    
>>
>
>I understand the concern, but it has worked in Europe,
>and if restricted to purely digital signals in 20 kHz
>channels, it shouldn't be all that hard. The only real
>problem I see is airspace for siting the towers that
>would be needed, and given the range of coverage that
>shouldn't be too hard either.
>
>---------------------------------------------
>Phil Alexander, CSRE, AMD
>Broadcast Engineering Services and Technology 
>(a Div. of Advanced Parts Corporation) 
>Ph. (317) 335-2065   FAX (317) 335-9037
>
>
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