1. F

    Unitrunker Is UniTrunker still popular? Alternatives?

    Hi there, I just entered the wonderful world of SDR and as such I am very new and inexperienced. I have watched a few videos online on how to decode P25 and similar trunked signals but these videos were fairly old. I have two RTL-SDR dongles (one RTL-SDR v3 and one NESDR Smart). I am using SDR#...
  2. M

    DSDPlus How to monitor P25 conventional on DSD with FMP

    I'm having a hell of a time trying to set up my RTL-SDR V3 to decode my local police departments, each one functions on a P25 conventional single frequency. I've seen too many videos on Youtube and have read countless hours of forums and articles on how to set this up to absolutely no avail...
  3. johnfeher

    Need help using SDRTRUNK with 2 RTL-SDR dongles to listen to Seattle KCERS

    I am new to the SDR hobby. On the positive note, I am able to listen/decode Seattle King County/ValleyCom Simulcast (Motorola Type II SmartZone) in Auburn using UNITRUNKER software. When I switch to the SDRTRUNK, (in hopes of perhaps having more control over what talk groups I listen to) all I...
  4. RTL-SDR Dongle

    RTL-SDR Dongle

    This is a RTL SDR dongle, part number RTL2832U, R820T2. This unit is in excellent condition. Full information is available here: https://www.rtl-sdr.com/about-rtl-sdr/ Software (free) is available here: https://www.rtl-sdr.com/big-list-rtl-sdr-supported-software/ Price: $15 Free shipping to...
  5. K

    Single Dongle DSDPlus Fastlane and FMP24 support in SDR#

    Hello all, I am looking for some help with SDR#. I am using a single dongle and would like to listen to my hotspot fusion conversations in SDR#. I have this working using FMP24 and DSDPlus Fastlane by itself but cannot seem to get it working in SDR# via the DSD Interface and or DSD+Ui...
  6. N

    DSDPlus Please Help with Decoding, I can't figure this out

    I used to be into the old school Radio Shack Scanners, but a few years ago in my area, Idaho Falls, Id (Bonneville County) started encrypting their frequencies. I just recently found out RTL-SDR and purchased two of them to use with DSDPlus Fastlane. I can now hear agencies up to 60 miles away...
  7. w2lie

    SDR# Issues with NooElec / RTL-SDR.com on new Win10 PC

    HI All I'm running into a huge problem that I've been trying to find a solution to for the entire day. If you don't feel like reading, this video describes my issues I just built a new computer to run some SDR projects. This PC was built for this and I think Murphy has his hands in this...
  8. k8jss

    dsd: new rtl-sdr feature

    Nearly 5 years later, I've finally managed to carve out some time to add rtl-sdr support natively to dsd. Any feedback/testing/etc is welcomed. Usage: dsd -i rtl:0 -o pa:1 -c 446M https://github.com/szechyjs/dsd/pull/108
  9. Floridarailfanning

    SDRTrunk Using Multiple Tuners For Increased Bandwidth?

    I must be missing something obvious here but how do you actually use two RTL tuners to resolve the "Tuner Unavailable" issue? Both of the tuners have unique serial numbers and are connected and appear in SDR Trunk but I can't seem to figure out how to combine the bandwidth. I've tried using the...
  10. 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...
  11. 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...
  12. 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...
  13. 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...
  14. 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...
  15. 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!
  16. 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...
  17. 2000nesman

    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...
  18. 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...
  19. 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...
  20. 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...