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RTL-SDR - an SDR receiver from a cheap DVB-T tuner on a USB connector

Ganjor86 682870 1593
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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
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  • #601 15070634
    don_viking
    Level 21  
    Welcome Charles Bronson First, it must be a USB2.0 port on USB1.0 ports and USB3.0 will not work. If you have the tuner connected to the USB2.0 port and it still doesn't work, uninstall everything and start from the beginning. First install the original drivers for the tuner then install zadig and follow this instruction below not that one. And don't replace any files in sdrsharp. He has what he should have.
    http://ywd.pl/projekty/odbiornik-sdr/
    http://ywd.pl/projekty/odbiornik-sdr-cz-2/
    At PW I sent you my version of SDRSharp with additions and set up as it should.
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  • #602 15070685
    andrzejz78
    Level 19  
    For me, USB 3.0 works

    don_viking thanks again What you helped and shared with n PW ;)
  • #603 15070692
    lysy1980
    Level 33  
    Show the screen from the device manager with the tuner connected. Use ZADIG version 1.1.1.139 to install drivers for SDR
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  • #604 15071123
    don_viking
    Level 21  
    When it comes to these interference, try to connect the USB tuner to the extension with a well-insulated cable. I am about 1.5 meters and it also makes a difference which port you hook up to. I have 4 ports on the laptop and I had similar interference on two of them. If you have an amplifier connected, either connect it directly to the antenna or not less than 2 meters in front of the tuner. Direct connection causes interference. And also when you set the gain too high in SDRSharp then there is overdrive and interference is formed which is manifested by "jumping" strange signals from time to time across the entire spectrum. I have done so that one SWA9701 amplifier is connected directly to the antenna, and the other FP6L on a cable 2 meters in front of the tuner. In the SDRSharp settings, the gain is set to 7.7 and the spectrum is clean without interference.
  • #605 15072107
    Charles Bronson
    Level 14  
    Hello. I launched the tuner today. HDDSR and SDRSharp version 1.0.0.863 still do not work despite further attempts. Thanks to my friend don_viking's help, the tuner ran on SDRSharp, but version 1.0.0.1332. It works on this, not on others. Kisses
  • #606 15072211
    Ganjor86
    Level 21  
    I use a Lenovo A3000 tablet for listening and because it has a weak USB port power supply, I have to connect via a USB hub with additional power and I think I need to check the power supply and maybe replace it with a transformer power supply with additional filters. And my goal is to modify the dongle in an interesting way to reduce the noise level as much as possible and buy a discone antenna if there are promising results.
  • #607 15081692
    tomek10861
    Level 27  
    As for reducing interference, a lot is said to be closed entirely in a metal tube closed on both sides with metal caps. Everything is connected to the PC with a shielded cable. The power choke is also a good idea (+ 5V, of course, not ground). Chokes on the data buses, in addition to interference, can cut the USB transmission.
  • #608 15083134
    Ganjor86
    Level 21  
    I will compare hiding the dongle to a metal box and connecting the cable to the dongle ground, I have already connected the cable to the ground and the effect is surprisingly good :) he is currently working in a metal products factory, so maybe he can design a box. This choke is to be only on one cable from the power supply or is it positive and negative? At the half or the end of the usb cable, or maybe at the beginning?
  • #609 15083462
    bogi
    Level 29  
    I will ask a little in spite of this:
    Is it possible to install one tuner as Tv and another as SDR on one W7 account? Tuners from different manufacturers one aver hybrid volar hd and the other not only lv5delux.
  • #610 15084929
    tomek10861
    Level 27  
    Choke on the PLUS. Giving the choke to the minus will interfere with the USB transmission. ;)
  • #611 15087130
    Serwis1

    Level 23  
    It is very interesting and fast scanner for SDR # (I'm testing it on V1.0.0.1411 right now)
    The scanning of the entire band visible in the SDR main screen window is performed with the step set in the "radio" tab. Any interference or unwanted frequencies are blocked by "X" in the window that pops up after starting the scanner, new detected frequencies and their intensity are recorded in the window. We set the blocking sensitivity (SNR) for me the best is 20 (depends on the band), Hysteresis 9, Next s 1.0
    After downloading, the .dll file should be placed in the SDR directory. open the plugins XML file and add a line from the downloaded "magicLine" file, or in older versions of SDR you need to edit / paste in the SDRsharp.exe file (config file) but this is probably what most should know
    In the frequency manager tab, I propose to select "show on spectrum" - you will have a better orientation in relation to your own base
    Scanner for download, e.g. here http://www.rtl-sdr.ru/page/skaner-poisk-novyh-chastot
    SDR # e.g. here http://airspy.com/download/
    Good luck
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  • #612 15089257
    andrzejz78
    Level 19  
    It is a pity that the scanner does not work on the older version. You will have to reinstall the plugins on the newer version of SDR
  • #613 15096875
    Lisu815
    Level 11  
    Hello

    Tempted by a cheap receiver with a wide range, I bought this:
    SDR RTL2832U R820T2 USB DVB-T scanner 25-1700MHz

    For the received set it was required (as the seller wrote) to install the program from the website:
    http://www.hdsdr.de/index.html

    I fired up the program, turned on watch, and I hear distorted noise and my voice, distorted too, of course.

    After writing to the seller, he spreads his hands and writes, please visit elektroda.pl ...

    I have no words.
    Maybe someone here will know how to start and set up this contraption?
  • #615 15097291
    Lisu815
    Level 11  
    I have no idea what and how to set it up so that I can receive something. I do not know if it is damaged or incorrectly positioned.
    It picks up some distorted noise, and a microphone is injected from the laptop so that I can hear my distorted voice and see it on the spectrum.


    This is my soft:
    Attachments:
  • #617 15097533
    BOOM i ZONK
    Level 21  
    ExTIO plug not active.
    I suggest using SDRSharp at the beginning, because it is more user-friendly.
  • #620 15099258
    zabex
    Level 22  
    Lisu815 col. don_viking he gave you a ready working soft on a tray! Not only that ... col. BOOM and ZONK suggested (and rightly) that you install SDRSharp !!!
    You haven't even bothered to get interested in what your friends are telling you (trying to help) and you are tossing some old SDR # descriptions when he was working on the old ExtIO_RTL.dll library.

    HDSDR from the package from col. don_viking
    It was enough to unpack and run.

    RTL-SDR - an SDR receiver from a cheap DVB-T tuner on a USB connector
  • #621 15099502
    don_viking
    Level 21  
    In the above instructions, not everything is correct in the description and there is no window in the dongle settings as in the picture. It is but in the old HDSDR version. In the attachment I add my two versions of SDRSharp with some add-ons so that no one has problems with running the program, some add-ons from the older version are not in the newer version and vice versa. I add that I use the program in Win7. There is also the matter of setting the frequency offset "ppm" because each tuner works with a different offset. I recommend to connect the dongle to the computer and turn on the program for about 20 minutes to warm up because it will float in frequency. Then I recommend that you set it to the frequency of 144.800MHz where the most APRS stations work and looking at where the most transmitted signals are located, click the up and down arrows in the "RTL-SDR Controller" window next to the "Frequency correction (ppm)" inscription so that the center of the signal is located in the middle of the red line. This way we have the exact frequency set. You can see everything in the photo. Good luck with your fun.
    RTL-SDR - an SDR receiver from a cheap DVB-T tuner on a USB connector
    Attachments:
  • #622 15103061
    Lisu815
    Level 11  
    don_viking Thanks for the program, I unpacked and worked on it a few times but it was a mess with every try.
    I unpacked the program and HDSDR and SDRsharp and there was such a problem that even following the instructions, the program did not pull the signal from the tuner only from the microphone so that I could hear myself.
    I thought what I found would come in handy.
    When running the program, should I change it like on the screen?

    With the SDRsharp program ready, it was also linden, I drove in turn and also got stuck
    Attachments:
  • #623 15103074
    ArturAVS
    Moderator  
    Have you installed the SDR drivers?
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  • #624 15103096
    Lisu815
    Level 11  
    Yes, I installed for both the first and second as in the screenshot, if that's the case.
    Generally, as it was supposed to be in the description.

    I am not very adept at this and had a problem with it.
    Attachments:
  • #625 15103186
    lysy1980
    Level 33  
    The first screen shows that HDSDR does not have the EXTIO.dll library - you need to copy it to the program folder. And honestly, I also suggest to bypass HDSDR and run SDR SHARP first.

    Also show a screenshot of the Windows Device Manager with the tuner connected to USB. As is the libusb tab in the tree - expand it and take a screenshot.

    I probably wrote on this topic (I'm not sure) to use ZADIG version 1.1.1.139 to install drivers for SDR - other versions often cause problems.
  • #626 15103752
    Anonymous
    Anonymous  
  • #627 15104202
    Lisu815
    Level 11  
    SDRsharp is also simpler and more organized in my opinion. And it has a wide and narrow FM.

    I took a screenshot and unfolded the windows, maybe they will tell you something.
    Attachments:
  • #628 15104526
    lysy1980
    Level 33  
    Remove this device from the device manager (delete), install the Relatek drivers for DVB-T reception, then install the drivers for SDR with the Zadig program in the version as given above.
  • #629 15105244
    Lisu815
    Level 11  
    I fired but I can not find this software from what I read, it is USB 2.0
  • #630 15106868
    bogi
    Level 29  
    bogi wrote:
    I will ask a little in spite of this:
    Is it possible to install one tuner as Tv and another as SDR on one W7 account? Tuners from different manufacturers one aver hybrid volar hd and the other not only lv5delux.


    May I have any help with this topic.
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Topic summary

The discussion centers on using inexpensive DVB-T USB tuners, particularly those based on the RTL2832U chipset combined with various tuner modules like the R820T and E4000, as software-defined radio (SDR) receivers. These devices, originally intended for digital TV reception, can be repurposed for wideband SDR reception from approximately 25 MHz up to 1.7 GHz, covering amateur radio bands, FM broadcast, airband, ADS-B, and more. Modifications such as direct antenna connection to the RTL2832U chip pins enable reception of lower frequency bands (below 30 MHz), including shortwave, though precautions against electrostatic discharge and signal surges are necessary. Upconverter circuits based on chips like LA1186, LA1185, and TA7358AP are commonly used to extend reception down to HF and VLF bands by frequency shifting signals into the tuner's range. Various software solutions including SDR# (SDR Sharp), HDSDR, and dump1090 are recommended for Windows and Linux platforms, with driver installation often requiring tools like Zadig to replace default DVB-T drivers with RTL-SDR compatible ones. Users report challenges with driver installation, device recognition, and antenna selection, especially for frequencies outside the FM broadcast band. Amplifiers such as the FP6L and antennas like Discone or long wire are suggested to improve reception quality. Mobile and embedded platforms like Raspberry Pi and Android devices with USB OTG support are explored for portable SDR setups. The community shares detailed schematics, installation guides, and troubleshooting tips, emphasizing the cost-effectiveness and versatility of RTL-SDR dongles for radio experimentation and monitoring.
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