1. N

    SDRTrunk SDRTrunk errors using 4x RTL-SDR receivers on Linux

    I'm trying to monitor a few P25 systems with channels that are not closely spaced, requiring multiple RTL-SDR receivers to cover. I've found that when the 4th receiver is used (not a specific receiver, just the 4th simultaneous one to be brought up), I get USB errors such as: 23:20:44.861...
  2. W

    RTL-SDR PDW bad signal

    Hi All, I'm trying to setup SDRsharp with PDW to decode P2000 pager messages. I have a RTL-SDR V3 with a standard dipole antenna. The problem is, I do get some scrambled messsages sometimes but most of the times I get UNKNOWN SYNC HEADER : B56C A6C6 AAAA 4A93 Also PDW says the signal is just...
  3. Z

    SDR# Picking up AM radio in SDRSharp in direct sampling Q Mode?

    Hi Guys! I'm poking around with some sdr stuff, and following the RTL-SDR v3 Quickstart guide thing, i set it to Direct Sampling Q Branch so i could try and pick up other signals I'm picking up a local station in Tampa (1250AM WHNZ) on 27.550548MHz according to SDRSharp Is this normal, some...
  4. A

    SDR# DSD decoder receiving data but no output

    I have been playing around with this for a while, checking forums and watching videos. I finally have to make my own post. It looks like DSD is doing something as CMD has data coming through it, but the event log doesn't show anything. I am not able to hear anything unless I check "Enable aux...
  5. J

    OP25 on RTL-SDR: LNA Gain Setting Issues

    Hey, Thanks to boatbod's setup, OP25 is running nicely on an old laptop I had running Ubuntu 18.04. The only weird issue is that it seems like the SDR's noise floor's do not change significantly when messing with the -N 'LNA:xx' setting in OP25. The noise floor from what I have seen in GNU...
  6. AB5ID

    The most frequency stable RTL-SDR

    Who currently make the most frequency stable RTL-SDR? I'm considering setting up Trunk Recorder for 800 MHz range and wondering what dongle has the least amount of drift over time and temperature. Thanks!
  7. K

    How to use op25 w/ P25 systems spanning more than single RTL-SDR bandwidth

    Is there any way to assign multiple RTL-SDR dongles to a single running op25 instance when the talkgroup frequencies are over 3 MHz +/- from the control frequency? If not, is there another way to handle this w/ op25? Are people just using supported SDR with a larger bandwidth that is affordable...
  8. 2

    Help with static issues on stream RTL-SDR

    Hi all, I come to you for assistance or guidance as I am very new to all of this. I'm trying to broadcast over on broadcastify on this page and its been a complete train wreck. I'm streaming to the site using a Raspberry Pi 3 B+ and a RTL-SDR dongle. I've managed to get Weather Band to play on...
  9. KoruII


    I am new to purchasing scanner equipment but an avid listener to the iPhone Scanner Radio application. Several months ago my hometown (Baltimore, MD) Police radio broadcast went and remains offline. I believe I read that the provider has moved out of the area and it appears no one is...
  10. Q

    RTL-SDR dongle recognized (and ejected) by Windows 10

    I have a RTL-SDR dongle which I use with AirSpy/SDRSharp #, and it was working fine till two weeks back. But looks like there was some automatic update done on Windows 10 or on the BIOS of my Sony Laptop (running Windows 10). Now when I fix my RTL-SDR dongle, I hear the the distinct tone of a...
  11. I

    Open Hardware devices for cheap SDR receivers

    Good day! For a while, I worked on creating completely open hardware solutions (such as Antenna Mini-Whip, HF Upconverter, and etc.) used to expand capabilities and work with low-cost SDR receivers (RTL2832U). At the moment, all devices publicly available on GitHub. You can get acquainted with...
  12. J

    More Video Guides to SDRplay RSPs

    The latest edition of TX Factor is an "SDR special" - it includes an intro into setting up an RTL-SDR dongle and shows the RSP2 and RSP1A in action at recent UK events - you can view it on https://youtu.be/tcf9IQQ2bGo The latest version of SDRuno now has preset ham band buttons to "auto-range"...
  13. M

    Standalone Device with Capabilities of SDR

    Pretty straightforward question: Is there a standalone device that can receive such a large spectrum as an RTL-SDR dongle? I'm new to radio usage in general, so I'm open to any suggestions that could make this post and future posts better.
  14. H


    Sill confused on how to use this. All I'm wanting to do is select a specific SITE (Tower) and monitor it to see what TGID's are using that specific SITE. I have my receiver setup done, I believe. RTL2832U R820T RUNNING READY. I have the system selected that I want: APCO P25, BEE00-1A7, Texas...
  15. D

    DSDCC DMR repeater input

    I am trying to use RTL-SDR with DSDCC to decode DMR on a raspberry pi. When I listen to a repeater output, the audio sounds as good as if it was coming out of my HT; however, when I attempt to listen to the repeater input, the voice is not discernible and DSDCC throws a lot of errors. Does...
  16. N

    Garbled audio - what am I missing?

    RTL-SDR v.3 Unitrunker DSD+ Windows 7, i7 2.7ghz, 8GB ram Here's a 2min video of my setup. https://youtu.be/_pq4sH-tZVM I actually bought a Wilson 301111 yagi, and I'm getting no better reception than the RTL-SDR stock retractable antenna. How is that possible? Is this reception? Decoding...
  17. S

    RTL-SDR and Raspberry Pi - Choppy Audio with rtl_fm

    Howdy! I'm new to both RTL-SDR and setting up a scanner provider. I've been following the instructions on the RR Wiki, Raspberry Pi RTL-SDR Broadcastify - The RadioReference Wiki and wanted to ensure the setup was working before I started the feed. As such, I've tried piping the rtl_fm feed to...
  18. H

    RTL-1090 file missing rtlsdr.dll

    I already had my dongle installed and working with sdrsharp program and decided to look at setting up for aircraft tracking-mapping-listening to. I needed two additional things: Virtual Radar Server and RTL-1090 program. I downloaded Virtual Radar Server with no issues but when I downloaded...
  19. S

    NOOELEC NESDR Smart Rant

    I ordered my Nooelec NESDR Smart last Wednesday morning and it arrived yesterday moring. Was excited to see the mail courier deliver it to my door. I ran to my room and diosconnected the old rtl2832u r820t dongle and plugedd in the smart. It is smaller than the original dongle measures 5/8ths...
  20. K

    Streaming from Pi RTL-SDR to IceCast server (sound with interruption)

    Hello! I've configured my RaspberryPi 3 with RTL-SDR according to this guide Raspberry Pi RTL-SDR Broadcastify - The RadioReference Wiki I have my own IceCast server. After I've launch transmission I received sound from IceCast with interruption. It is hard to explain, that's why I...