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8976Re: [nslu2-general] Re: woe. woe& thrice woe,~SORTED

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  • Richard Bown
    Apr 23 10:14 AM
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      On Tue, 23 Apr 2013 16:38:03 -0000
      "oddballhero" <oddballhero@...> wrote:

      > I guess we must have been composing messages at the same time, I'm a little confused on what your
      > terminology regarding local and remote but if it works, it works. See if it does your hi-res PCB
      > images.

      Hi
      sorry I was referring local to the server as that was what was being worked on, and remote for
      anything attached to it.
      Yes I seen the notes on a pogoplug and a PI being used for SDR, the problem with the low end SDR
      system is dynamic range, ie how big a signal they can cope with. I spoke to someone 20 miles away
      from me on 144 MHz SSB on Sunday and he was using a Flex 500, , quite expensive piece of SDR
      equipment.
      Because of the power I was using and high antenna gain I was totally overloading his system , even
      when I lowered my power to 3W. To get a reasonably dynamic receive range you have to use very high
      sample rates, its done professionally but not for Hams, as it costs mega bucks.
      I use digital systems for very weak signal work, and I'd love to get WSJT , which is a
      python/fortran application, running on an ARM processor. Part of the WSJT suite WSPR can be run on
      a PI, but I dont know of anyone running the JT modes on an ARM processor yet. it pure number
      crunching.
      For the hell of it now I'll try again on the NSLU2 as a print server,
      It seem that ARM5 devices don't like the boot partition to be more than about 3GB.
      I'll note the problems with changing the subject line on this list
      Thanks for the help
      --
      --
      Best wishes / 73
      Richard Bown

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