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No RTL-SDR topics on the 'zed'?

Discussion in 'General Technical Questions and Answers' started by KA7O, May 4, 2012.

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  1. KA7O

    KA7O Ham Member QRZ Page

  2. N0SYA

    N0SYA Ham Member QRZ Page

    This thing speak windows?
    If it does I want one.
    Or more.
     
  3. KA7O

    KA7O Ham Member QRZ Page

    Yes - it will work with HDSDR (and others) http://www.hdsdr.de/ on Windows. But some of the 'way cool' stuff requires GNUradio (such as the P-25 stuff).

    Follow the instruction here: http://www.rtlsdr.com/2012/04/getting-started-with-rtl-sdr-dongle/

    Now, for some background. This dongle is made and marketed as a DVB-T receiver.
    "DVB-T is an abbreviation for Digital Video Broadcasting — Terrestrial; it is the DVB European-based consortium standard for the broadcast transmission of digital terrestrial television" - Wikipedia.

    Since we don't use DVB-T in North America, it is NOT marketed here. You have to get one of these from somebody that will export to the US. Most have been getting theirs out of Hong Kong. If you'll still deal with eBay, do a search for "RTL2832U" and you'll likely find a few sellers. You can also get them via aliexpress.com and other places.

    BUT! Buyer beware. They are NOT advertised, marketed nor designed for this use. Sellers have noticed the 'spike' in sales to a new market and not only are prices are going up, but there are dongles being sold that will NOT work. I know I've been 'stuck' with one - but for a $17.00 bet, I didn't loose too much.

    To work as we'd like, it MUST have the Realtek 2832U chip. It's well worth your effort to read up on this BEFORE placing an order. FWIW, that 2832 U chip is the same one used in the FunCube dongle.

    EDIT:
    Here's a link to a Screenshot of HDR running on my old HP laptop using a 'Newsky' dongle. Took me about 5 minutes to get this all up and going from scratch. This is using the dinky 'antenna' that came with the dongle, in the basement of my house. It seems to have about the same sensitivity as a TH-79A(d) I have here listening to the same NOAA weather station.
     
    Last edited: May 4, 2012
  4. KA7O

    KA7O Ham Member QRZ Page

    A Youtube Video Demonstration of HDSDR. This is not using the DVB-T dongle. But does give a good idea of what we're talking about here.

    The SDR used in this video is from Ettus Research. The rtl-sdr has similar - but not the same - kind of performance.
     
  5. KB4QAA

    KB4QAA XML Subscriber QRZ Page

    WOW! That is the best demonstration of the RF spectrum and signal analysis I've ever seen by an amateur. And the software is spectacular.

    This is the direction of SDR Shortwave Listening, no doubt about it. :)
     
  6. KB4QAA

    KB4QAA XML Subscriber QRZ Page

    Dupe, slow server.
     
  7. K4NYA

    K4NYA Ham Member QRZ Page

    There's also a Reddit group dedicated to RTL-SDR: http://www.reddit.com/r/RTLSDR/

    I ordered one of these dongles off eBay. Still waiting for it to arrive.
     
  8. W9GB

    W9GB Ham Member QRZ Page

  9. KA7O

    KA7O Ham Member QRZ Page

    Saw that comparison - need to look at it closer. Rough take is they are different, but in some ways perform comparably.

    VERY much worth taking a good look!

    This is a very good way to 'dip a toe' into the SDR waters, learn a bunch and then when it's time to go all in, order up one of the Ettus boxes, a FLEX rig or one of the other 'real' toys. Even at a 'mere' $200.00 (aprox), the FunCube is well worth the dosh. Still, $200 > $25.

    Just ordered up 'more than a few' of the dongles. Gotta hamfest come'n up soon. May be some unique door prizes <g>
     
  10. N0SYA

    N0SYA Ham Member QRZ Page

    So what's the biggest bang for the buck hardware right now, and what software for general scanner/satcomms use?
     
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