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  1. Jeff

    The chinese Itead which designed and build the Airspay HF+ Dual some years ago did a great job at least at that time. No doubt.

    The Airspy Guy who sales the SDR didn’t. Poor support, poor development & product care, unsolved obstacles & problems, a aggressively suppressed user community.

    Wouldn’t buy an Airspy product again. I guess I was blended by the noble appearance an moderate pricing of the HF+ Sorry.

  2. DeepCoder

    I cannot make the spyserver it starts up but then it says

    SPY Server v2.0.1700
    Copyright (C) 2016-2018 Youssef Touil - https://airspy.com
    Reading the configuration file: spyserver.config
    Listening for connections on 0.0.0.0:5562
    Detached kernel driver
    Found Rafael Micro R820T tuner
    [R82XX] PLL not locked!
    Reattached kernel driver
    Detached kernel driver
    Found Rafael Micro R820T tuner
    [R82XX] PLL not locked!
    Reattached kernel driver

    Please help me

  3. none

    Who is that stupid and use UDP Network Cable?!
    Over Years we and our Customer use only S/FTP Cable ONLY!
    I wish he would try them to and see if there is any RF leak to.

  4. James

    Using (rtl-sdr) is it possible and ,if yes, how to demodulate modern digital modulation radio signals such as ASK, FSK, GFSK, GMSK, MSK, PSK, QPSK…etc, please? Thank you.
    Best regards…

  5. James

    Is it possible and if yes how to demodulate modern digital modulation radio signals such as ASK, FSK, GFSK, GMSK, MSK, PSK, QPSK…etc using rtl-sdr?

  6. Jarda

    Hi, how to run this on windows? How to compile to .exe? I want to test my nooelec nesdr smart. 😉 Thanks. Or i can record dab signal.

    • Andreas Hornig

      Hi Jarda,

      you can use it with Python 3.7 on windows, compiling it is noot needed.
      I tried to compile it to an exe, because I wanted to test it with NUITKA, but that did not work yet. I will try to update that for you if you are interested.

      Thanks for testing it. 🙂

      • Jarda

        I got this error.

        Traceback (most recent call last):
        File “cali.py”, line 3, in
        from tqdm import tqdm
        ModuleNotFoundError: No module named ‘tqdm’

        • Jarda

          or next error (i have installed python 3.8 into 3.7 folder).

          Traceback (most recent call last):
          File “cali.py”, line 5, in
          import calibratesdr as cali
          File “C:\Users\qquid\AppData\Local\Programs\Python\Python37\calibratesdr\__init__.py”, line 1, in
          from calibratesdr import utils, dabplus, dvbt, gsm
          File “C:\Users\qquid\AppData\Local\Programs\Python\Python37\calibratesdr\utils.py”, line 5, in
          from rtlsdr.helpers import limit_calls
          File “C:\Users\qquid\AppData\Local\Programs\Python\Python37\lib\site-packages\pyrtlsdr-0.2.92-py3.8.egg\rtlsdr\__init__.py”, line 56, in
          from .librtlsdr import librtlsdr
          File “C:\Users\qquid\AppData\Local\Programs\Python\Python37\lib\site-packages\pyrtlsdr-0.2.92-py3.8.egg\rtlsdr\librtlsdr.py”, line 50, in
          librtlsdr = load_librtlsdr()
          File “C:\Users\qquid\AppData\Local\Programs\Python\Python37\lib\site-packages\pyrtlsdr-0.2.92-py3.8.egg\rtlsdr\librtlsdr.py”, line 45, in load_librtlsdr
          raise ImportError(‘Error loading librtlsdr. Make sure librtlsdr ‘\
          ImportError: Error loading librtlsdr. Make sure librtlsdr (and all of its dependencies) are in your path

          • Jarda

            i reinstalled all completely, and install pytho 3.9 (newest version), your sdr calibrate, rtl sdr, and i ahh windows .dll files from sdrsharp (rtlsdr.dll and libusb1.0.dll) and your sdr calibrate start working.
            I record some examples from our local dab on 12C (czech republic national dab+) and every file show different results in ppm. Some files show none or 0,9… and some show more than 600 and i try dab dx from germany on 5C and 9A (best singlas) and got same as my local transmitter.

  7. Coots

    I understand the difficulty in customize a
    monolithic ic for niche purposes, but I wonder
    if Rafael could offer a version exposing the
    local oscillator output
    Someone has connections with the company?
    😉

    • Bertie

      Typically for a silicon chip, you are talking about a million dollars to get it into full production. So unless there is a big enough market to recover the costs and turn a profit in under 5 years, I personally do not see that happening.

      The best you as an individual could hope for is to buy a bunch of them, decapping a few and searching for a test point where the output from the PLL may be accessible.

  8. Paul B

    I ordered and promptly received a V3 dongle, but had a bit of a minor hardware issue. Two emails later, my problem was resolved and I am extremely happy with the product and support. Performance-wise, it’s better than any other dongle I’ve tested, on HF it works very well, and on all frequencies, it is devoid of the ‘funnies’ other dongles exhibit.
    Thanks for the great product, and product support. I happily recommend the product and company based on my overall experience.

  9. Pete Lehmann

    I’d REALLY love it if you guys could provide a link to download a PDF version of all that goodness in the article. I’ll see what I can do, but it’s never as cool as when the manufacturers do it! Thanks for this, BTW. This answered all the questions I had about integrating this into our kit, but the PDF is needed to convince those with the purse-strings!

  10. stup52

    The software immediately opens the scan window so there is no access to the main window and therefore the settings. If no channel is found when initially scanning the only alternative is to shut the scan window which closes the software. Unless there is access to settings the software is almost unusable..

  11. NewRadioDude

    I’ve just installed openear 1.7 for windows 10 and everything seems to be working fine on the waterfall but i’m not hearing any audio. Ive already tried replacing rtlsdr.dll from my sdr# folder and that didn’t change anything. Any thoughts?

  12. Jeff

    THANK YOU! Wasted 3 days fiddling about until Ii ifound this site. It was the rtlsdr.dll file I needed.
    Now works like a charm!

    73s
    M7KEC

  13. Ben Z

    Works great from my bootable USB, but when I installed it to the hard drive i am missing most of the programs that would appear on the desktop of the bootable USB. The grub screen to load it just says Ubuntu… no mention of Gorizont. Any help would be appreciated.

  14. Valentin Vozian

    If using last beta version, you can make leaflet work by modifying windows registers.
    From support site:

    No.149 Map View by Leaflet library does not properly work (RTKPLOT, SRCTBLBROWS, ver.2.4.3 b34)

    Map View of RTKPLOT and NTRIP Browser by Leaflet library does not properly work. Map View has no response or a script execution error occures in RTKLIB/bin/leaflet/leaflet.js.
    Older version behaviour of WebBrowser component used in the Map View of RTKPLOT or NTRIP browser might make trouble with Leaflet. Add the following entry of Windows resistries by regedit (Registry Editor) to run the WebBrowser component in IE11 emulation mode. (2020/12/30)
    – Key: HKEY_LOCAL_MACHINE – SOFTWARE – Microsoft – Internet Explorer – Main – FeatureControl – FEATURE_BROWSER_EMULATION
    – Name: rtkplot.exe
    – Type: REG_DWORD
    – Data: 11000 (decimal)
    – Key: Same as above
    – Name: srctblbrows.exe
    – Type: REG_DWORD
    – Data: 11000 (decimal)