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Which transmitter is stronger ?

Discussion in 'Satellite TV, Sky TV & FreeSat' started by mortod, Jul 7, 2003.

  1. mortod

    mortod
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    I have a choice of two transmitters, more or less in line. One is 10x the power, but is only 5x the distance away. Which one would give me the stronger signal ? (either 0.1kW at 12km, or 1.0kW at 57km).

    I know the obvious answer is to try it, but before I go to the effort of chaning my arial polarisation, thought it worth asking.
     
  2. LV426

    LV426
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    Too many factors - not just ERP and distance. Lie of the land; obstructions (trees, buildings). Plus - channels used vs. the type of aerial you have.
     
  3. mortod

    mortod
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    Wide band aerial. Same direction so same lie of land. Interested in the theoretical answer assuming all other factors the same.
     
  4. Chris Muriel

    Chris Muriel
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    In theory , as power dissipates with an inverse square law, the 10 times higher power would not make up for the extra distance.

    Having said that , it very much depends also on obstacles between you and the transmitter antennae. You would need to do a path profile analysis to do a more accurate guess.

    So I would expect the nearer one to be better but you should suck it & see.

    Chris Muriel, Manchester.
     

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