Alternative ExtIO for Compatible SDR Software

The folks over at SDR# have uploaded an updated plugin for ExtIO compatible software.

You can download your copy from [LINK REMOVED – it appears SDR# has removed the file]

To use it, extract to the same folder as SDR#/HDSDR/WRPlus/etc and select the ExtIO_RTLSDR.dll depending on your software instructions. (HDSDR will prompt you which ExtIO plugin you want to use if you already have another ExtIO DLL installed.)

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  • Jan
  • Ray
  • tdbone1

    i like to use hdsdr and my ezcap 666
    that file does not work for me when i unzip it into hdsdr dir?
    i already have rtlsdr.dll there and i have used other zip files that let me pick the extio_rtlsdr.dll that actually work but the gain comes PRE-SET with either 2Msps or 1Msps depending on the file you unzip to the hdsdr dir
    those work fine but there is no interface at all when i click the extio button in hdsdr
    everything else works with those two files just no iterface and i cant adjust the gain

    THERE WAS ANOTHER FILE released the next day that actually had the interface showing up where you could pick your sample rate and gain
    could someone for the love of god PLEASE POST THAT
    i like hdsdr…SUE ME quite trying to sabotage it and the people who like it by hiding the files!

  • Ray

    The version you speak of with the GUI is available from the link in my previous comment. Works fine

  • tdbone1

    how do i get it working
    that gui version has a huge default sample rate not even close to 1Msps or 2Msps
    its like 28Msps

  • tdbone1

    default install of “hdsdr v 2.14″
    default install of “ExtIO_USRP+FCD+RTL2832+BorIP-BETA_Setup”
    i then copy “librtl2832++” to the hdsdr dir over top the old “librtl2832++”

    now please tell me exactly what i need to do to get hdsdr to use rtlsdr and a gui to adjust sample rate and gain

  • Martin


    Do these instructions help you:

    [–]dutchguilder2 6 points 16 days ago*

    Read All These Steps Before Starting Step 1

    Watch this first:

    Download and install HDSDR.

    Plug the RTL2832 into a USB port. If Windows says “Found New Hardware” click “Locate and Install”, wait for Windows to install driver, may need to reboot before continuing.

    Download and install, unzip it, run the .EXE. Set “Destination Folder” = folder where HDSDR was installed in step 2 (either “c:\program files\HDSDR”, or “C:\Program Files (x86)\HDSDR”).

    During step 4, “Zadig” launches. Zadig can take 20+ minutes to run and might say “driver installation failed”, if it fails just reboot, then do Step 4 again until it succeeds. If your computer hangs while rebooting, turn off the power and repeat Step 4. To use Zadig: in the “Device” combo box select “RTL2832” or “RealTek 2832 Device”, then click “Install Driver”, then quit by clicking the “X” in the upper right corner of its window (you must manually quit it to continue the install). If your RTL does not appear in the Zadig’s “Device” combo box then click the menu “Options/List All Devices”. If you plug the RTL2832 into a different USB port you may need to repeat this step.

    Download the newer librtl2832++.dll, copy it into the HDSDR directory (either “c:\program files\HDSDR”, or “C:\Program Files (x86)\HDSDR”) overwrite the existing file with the same name.

    Run HDSDR, ignore any error messages, then in the “Device Control” window enter “Hint” = “RTL tuner=e4k” (if you don’t have a E4000 RTL, just use “Hint” = “RTL”), click “Create”. Enter “Sample rate” = “2”, then click “Set”, then close the window. If the “Device Control” (“ExtIO”) window was not opened automatically, click “ExtIO” button to open it. Close the “Device Control” (“ExtIO”) window then re-open by clicking “ExtIO” button to confirm “Sample Rate” = “2”; if it isn’t 2, enter “2” then click “Set”.

    Now HDSR can get data from your RTL2832 via the ExtIO plug-in. In HDSR click “Start” button (or “F2″) and you should begin receiving signals. Click “FM” to hear most signals.

    General Notes

    The RTL2832 needs to be rebooted often. If you are changing frequencies but the RTL does not seem to be responding, remove the RTL from its USB port then plug it in again, then restart HDSDR.

    Tuning using HDSDR: tune up/down by left/right mouse clicking the frequency digits. “LO” = center of the tuning window, “Tune” = tuning frequency that will be demodulated. The energy displayed at the center frequency is mostly just an artifact and not a signal. You can also tune by clicking on the spectrum or waterfall displays, or by dragging the box that displays the frequency range.

    Frequency and wavelength are 2 equivalent ways of specifying a signal. Generally, units for wavelengths given in meters (m) and frequency in MegaHertz (MHz). To convert between them, wavelength (m) = 300/Freq (MHz). Eg: 40m wavelength = 7.5MHz. HDRSDR displays frequencies in Hertz, so multiply/divide by 1,000,000 to convert to/from MHz.

    The RTL2832 can only receive 62MHz – 1700MHz. To receive 10m (7.5MHz) Ham radio and other popular signals in the “high frequency” (HF) range you would need to purchase a transverter/upconverter that takes an input signal, adds at least 62MHz, then outputs it.

    An antenna is generally designed to receive a specific frequency by choosing its size to be 1x, 1/2x, or 1/4x of the wavelength. Generally, long antennas are designed for low frequencies and short antennas are designed for high frequencies. The 0.15m antenna included with the RTL2832 is designed for (2×0.15)/300 = 1000MHz. A bigger VHF antenna (0.5m) will work better for lower frequencies near 300MHz. To receive lower signals (like 162.4MHz weather) you might need a bigger VHF antenna rather than the small 0.15m antenna. A cheap VHF “rabbit ear” antenna is $7 on EBay and requires an adapter like this.

    Mostly signals in the VHF and higher bands are modulated using frequency modulation (FM). HDSDR supports FM, AM, LSB, USB, DRM etc. so make sure the “FM” button is selected otherwise you will hear only garbage (but you can experiment with the others too).

    Interesting signals you can hear: weather at 162.4MHz, various radios around 153MHz, 460MHz, and 860MHz.

    HDSDR only demodulates narrow FM. To hear wide FM (broadcast FM radio stations 88-108MHz) download SDRSharp, unzip it into the same file directory as HDSDR. Run SDRSharp.exe, tune to your local FM radio station and choose “WFM” (wide FM) demodulation.

    The above information comes from:

  • redtank

    I’m running the 64 bit version of Vista on an Intel based laptop. I’m unable to install the bulk in (0) interface and the driver provided when I run ExIO_USRP+FCD+RTL2832+BorIP-BETA_Setup.exe file. Vista complains about the ExIO driver not being signed, but offers to install it none the less, then comes back and says it can’t install it. I’m baffled by Vista’s reluctance to accommodate this software. On the other hand, I’ve been able to follow the procedure and get my RTL283U w/ E4000 tuner working on a XP machine I have here at home.
    Any idea what I’m doing wrong with my Vista machine?

  • andy

    Be sure there is no windows installer window open that tells you there is no driver found and waits for your input.

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