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any hobbyist satellite digital radio tuner

Discussion in 'Electronic Design' started by amg, Oct 7, 2004.

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  1. amg

    amg Guest

    Is it possible to build your own satellite radio tuner?
    I guess they do not sell the chip sets to hobbyist?
  2. Ian Stirling

    Ian Stirling Guest

    Possible, yes.
    In practice, it's a horribly complex project, with basically all
    the difficulty of a satellite reciever, digital decoder, and MP3 player
    all added togethter.
  3. Joel Kolstad

    Joel Kolstad Guest

    Sounds like the perfect college senior design project! ;-)

    (Someone who just finished his own USB project and -- on a USB bulletin
    board -- saw a regular stream of, "My professor says I need to interface a
    PIC to a USB-connected NTFS (with encryption) RAID array and implement a web
    server interface over a Gbps Ethernet connection to retrieve the files. In
    3 months. How should I proceed?")
  4. amg

    amg Guest

    I can see a chip which is satellite receiver, then, music player.
    Aren't those chips already consumer items?
    The chip inside may be complicated, but connecting it and make it work seems
    like maing a MCU controller works.
  5. Ian Stirling

    Ian Stirling Guest

    In theory.
    In practice, it tends to get rapidly more complex.
    For example, the satellite reciever will need to be properly designed
    and shielded to obtain the required noise figure. Microwave design
    is a whole arena of problems in itself.
    The music player chip won't accept the raw output from it, you're going
    to need to convert the datastream coming from the satellite reciever
    output to the right format, as well as hooking the tuning from the satellite
    reciever stage to the output of the data stage in the proper way.

    I would >GUESS< that if you can get the right chips, you're looking at
    at least a dozen large chips (with 100 connections or more), another
    couple of dozen smaller chips and several hundred passives.
  6. Ian Stirling

    Ian Stirling Guest

    Kill the professor, replace the documentation, and build a LED flasher.
  7. Rich Webb

    Rich Webb Guest

    Damn you, Ian! Now I have coffee sprayed over the monitor and keyboard.
  8. Then fail the course ;-). I know you are joking, but the simple
    approach doesn't fly in industry, either. It used to be we could put a
    few parts on a PCB and call it a "product". Now it takes software,
    firmware, RF and packaging just to get a "device". Developing a
    product then takes marketing, sales, and other disciplines where I
    know little.

    Frank Raffaeli
    Frank Raffaeli
  9. Maybe, maybe not. If you can get the parts and build the radio, how are
    you going to get a decryption key to make it work?
  10. amg

    amg Guest

    That's what hobbyists do.
    I can see all the ham radio go digital and satellite.
    Don't you?
  11. Dbowey

    Dbowey Guest

    amg posted:

    << That's what hobbyists do.
    I can see all the ham radio go digital and satellite.
    Don't you?
    In the future, you should copy into your message, the message to which you are

    No, I don't see ham radio going all digital and satellite. There is an
    interest in both, but if that is *all* hams wanted they would just use a
    cellphone or only play at ham radio on 2M.

  12. Ian Stirling

    Ian Stirling Guest

    Err, no.
    I can see spending time making things that are available, to make a
    I cannot see spending more than the retail price, and several hundred
    hours in making an inferior device.

    And I'm not exactly typical, I'm making parts for a four stage orbital
    rocket at $10000 all-in, in the garage.
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