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

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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
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  • #691 15298442
    don_viking
    Level 21  
    KamilOc wrote:
    Hi, and I have a question, are there any interesting SDR plugins worth attention? best regards

    Check the page below and choose the ones you think are worth your attention. Each of your colleagues has their own needs and nobody will answer the question "which plugins are worth paying attention to".

    http://www.rtl-sdr.com/sdrsharp-plugins/
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  • #692 15325978
    Anonymous
    Anonymous  
  • #693 15325998
    Skco
    Level 11  
    It looks like a problem with the .net framework.

    Have you checked the compatibility mode?
  • #694 15326012
    don_viking
    Level 21  
    Not necessarily this error. It depends which version of sdrsharp you have 13 or 14, because each version has separate plugins. I will explain it this way that plugins under 13 will not work in 14.
  • #695 15327856
    Anonymous
    Anonymous  
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  • #698 15329892
    Anonymous
    Anonymous  
  • #699 15331751
    don_viking
    Level 21  
    I didn't write it maliciously about this reading of these topics so you wouldn't get offended. But I just meant that sometimes it is worth looking deeper and you will find everything. Come who asks does not err. Best regards and have fun with the tuner.
  • #700 15335996
    czakos
    Level 12  
    Hello dear colleagues, I have just finished studying an article that will engulf me :) of course, the dongiel was ordered, the blue one from the 28 800 quartet, so probably the better one: p only if someone could explain the settings to me, I downloaded ready SD Sharp packages from don Viking so I will check my friend's program, because if the drivers are installed and the FM radio works, it is different, for example services that interest me mainly PSP, unfortunately, despite the am setting, because I think it should be at this frequency, i.e. 168.550 MHz, the bars appear, unfortunately I can not hear anything, there are noises the antenna from the set I donated I still have one at 1097Mhz but she probably only receives this band because also I can't hear anything on the directional antenna from the dvbt on the balcony. I ordered a 144-430Mhz nagoya and I will test it on Monday it should be. But the question is, as much as the FM radio somehow sounds, even though the bars are at 168 MHz, you can't hear anything. I am a total layman when it comes to any modifications of the dongle. I mean the PSP pickup, which is about 1km away from me, so it shouldn't be a problem. And the hospital is 700 m long. Regards and thank you in advance for your understanding :)
  • #701 15336509
    Anonymous
    Anonymous  
  • #702 15336663
    czakos
    Level 12  
    But I have to set it to AM, because even though the posts are nothing you can hear, only noises, I made a simple antenna on a Miotly stick, 48 cm arms and it was a bit better but still nothing can be heard, only noises, maybe I have to put something? For now, I am waiting for the antenna and I will try to figure out something, because I have PSP and the hospital in sight.
    And if I can't make Nagoya, I will apply :) but something must be wrong anyway, if the bars jump, the graph at the bottom appears yellow that something was and you can not hear anything: /
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  • #703 15337021
    kriss51
    VIP Meritorious for electroda.pl  
    czakos wrote:
    But I have to set it to AM


    You have to set to narrow FM to listen to PSP. The ambulance service doesn't have analog communication anymore, so you won't listen to that anymore. Two pieces of wire about 48 cm each will be ok.
  • #704 15337134
    czakos
    Level 12  
    And how about the bandwidth filter, order filter, and step size 12.5? Cramps I will gather again that I only sit at the computer and fly with the antenna :)
    I made an antenna for the 48 cm for the wing and, despite the signal, you can hear everything but the conversation; / I'm attaching screenshots of course sdsharp from my friend don_viking from the attachment. Judge for yourself, I will add that rmf fm plays beautifully :D RTL-SDR - an SDR receiver from a cheap DVB-T tuner on a USB connector RTL-SDR - an SDR receiver from a cheap DVB-T tuner on a USB connector RTL-SDR - an SDR receiver from a cheap DVB-T tuner on a USB connector RTL-SDR - an SDR receiver from a cheap DVB-T tuner on a USB connector
  • #705 15338749
    don_viking
    Level 21  
    Hello "czakos". On the first photo, which I posted below, you have the best settings for receiving narrow FM, i.e. NFM. Wide FM, otherwise WFM, is best heard and works in stereo when set as in the second photo. There is also the issue of setting the frequency correction because the pictures show that the signal is received a little to the left of the center of the set frequency. You will have the best sound when it is in the middle of that red line which goes vertically when you hold the mouse in the middle of the screen. besides, what you receive on the 169Mhz frequency is a digital DMR ambulance signal. Ambulance transmits digitally as also marked "kriss51" So you have nothing to look for on this frequency under normal conditions.
    RTL-SDR - an SDR receiver from a cheap DVB-T tuner on a USB connector RTL-SDR - an SDR receiver from a cheap DVB-T tuner on a USB connector

    I would like to add that it is better to make photos of the desktop with the "prt sc" key at the top of the keyboard, open the pait and paste the photo and save.
  • #706 15340426
    Anonymous
    Anonymous  
  • #707 15340679
    RAFPOL5
    Level 17  
    File in hand and clean the ends of the tubes, tin with rosin and must be soldered.
  • #708 15340763
    internick
    Level 36  
    Open the tube and fasten with a screw.
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  • #709 15341268
    czakos
    Level 12  
    RTL-SDR - an SDR receiver from a cheap DVB-T tuner on a USB connector
    I still can't hear anything; / I fly on frequencies when I find a post, I set it and only hum; /
    is it profitable to buy sdr touch key?
    The hole with a screw will be more durable than soldering, if you catch a nut from the bottom, you have a sure thing :)
  • #710 15341406
    Anonymous
    Anonymous  
  • #711 15341615
    don_viking
    Level 21  
    First of all, the tuner is working properly, you are just looking for the wrong place. In the band from 168Mhz to 174Mhz there are services that mostly use digital communication. Look lower or all higher between 420Mhz and 470Mhz. I recommend visiting the website of the Office of Electronic Communications, the link of which is provided below. There you have to select the appropriate provincial branch and save the file to disk. Radio permits are available in the file and the frequency and other necessary data are also given there, but unfortunately it is not written whether the station broadcasts analog or digital. It is always the first step, you set the frequency and wait for something to move in the ether.

    https://www.uke.gov.pl/pozwolenia-radiowe-dla...-sieci-radiokomunikacji-ruchomej-ladowej-5458
  • #712 15341677
    czakos
    Level 12  
    So what the PSP can no longer listen to? The tuner certainly meets the requirements for sdr tomorrow from the laptop I will throw a photo of the system.
  • #713 15341735
    don_viking
    Level 21  
    PSP transmits between 148Mhz and 150Mhz. From 150Mhz to 153Mhz you have a turn. The rest is described on the page below.
    http://sq9jdo.com.pl/Niezbednik/Bandplan/VHF.html

    If you didn't have what they should be, you wouldn't run the tuner at all. The tuner is 100% functional because you can see in the pictures that it works as it should.
  • #714 15342457
    czakos
    Level 12  
    Thanks a lot, tell me if A7 under the antenna input is this protection diode? And won't any of these antennas do better than my self-made dipole. Buddy Viking, is there any plugin, so that I can set the psp frequency range and let sdsharp scan this range all the time, I mean to set myself and not sit and wait for something to appear and then set something like a normal scanner from uniden. best regards
    RTL-SDR - an SDR receiver from a cheap DVB-T tuner on a USB connector RTL-SDR - an SDR receiver from a cheap DVB-T tuner on a USB connector RTL-SDR - an SDR receiver from a cheap DVB-T tuner on a USB connector
  • #715 15342500
    mkpl
    Level 37  
    Yes, the SOT23 A7 element is a double protection diode in this system.

    Antenna it all depends on what you want. For a wider range it is better to buy a prefab, but for a narrow band you can also make a pretty good antenna on which you can hear a lot.
  • #716 15342656
    don_viking
    Level 21  
    I added the program in the attachment, it is version 14 and I set you how it will work for you, I do not know because I did not use it at home. The frequency scanner tab.
    Attachments:
  • #717 15343635
    Anonymous
    Anonymous  
  • #718 15346339
    don_viking
    Level 21  
    You probably won't get rid of it, I also have similar interference there, despite the lower amplification. The only thing you can try is switching to different ports. In my laptop, there is one port where I have little interference, others are unacceptable. Even a recorder or a hard disk can generate interference, the port itself also generates interference somewhere there was once a problem on a forum.
  • #719 15346475
    Anonymous
    Anonymous  
  • #720 15346541
    don_viking
    Level 21  
    Maybe colleagues with experience on this topic will also comment, because despite all attempts, I did not eliminate all the distortions caused by the omnipresent electronics.
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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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