Step 4: Installing Drivers for the SDR Receiver

Download and extract Zadig (you will need a program like WinRAR or 7-Zip). Take note if using Windows XP you will need to download the XP version. Connect the receiver to your computer and ignore/cancel any attempts Windows tries to make to automatically install drivers. In Zadig select “Bulk-In, Interface (Interface 0)”. You may need to go under options and list all devices. Select WinUSB as the driver to install and press Install/Replace Driver.

Next to Driver it should now say WinUSB and the version number. I don’t believe it is required, but if you like you can do the same for Interface 1.
<p>Help! I have followed all of the above and SDR# &quot;looks&quot; good, Unitrunker is showing activity and all the information changes as the calls come through, I have DSD running and I can see lots of activity happening in the DOS screen that matches the changing data in Unitrunker. BUT I don't hear a thing! I know I have missed something, but I have looked so long my eyes are crossed. Any help for a first timer would be greatly appreciated.</p>
<p>If you don't load the groups you get everything in the system.</p><p>As they popup in the calls list you can name them by clicking on them. You can also lock out the ones you don't want. Downloading the radio reference list is easiest, but you still have to lockout the ones you don't want. When you find your system in the search the ?sid=xxx in the url is the one you put in the system info tab Site ID for download. </p>
<p>All you need is zadig, UniTrunker, and one dongle.<br>Create a RTL radio.<br>In the info tab say 2 VCO's<br>1st vco is control channel<br>2nd is voice<br>You also need all the channels set up and the trunk groups -RadioReference is the place.</p>
<p>has anyone tried this on the rasbery pi 2</p>
<p>Would I be able to monitor air channels 118-136 with this setup? Great writeup!!!</p>
<p>hi. i would like to know if i can do this with ANY (by any i mean non rtl2832 based chipsets) usb tv tuners. i am unable to get any of those in my country (uruguay).</p>
<p>I seem to have gotten SDR to work but the voice reception is choppy. Does anyone have a solution to improve this?</p>
<p>Nice write-up.. Up to the point of configuring UniTracker Control. Under model there is no debug option. Suggetions? Thanks..</p>
<p>I'm using UniTrunker version and the initial creation screen includes a button for Debug. Once created, I left the type as debug also and it seems to work okay.</p>
<p>what kind of antenna would you suggest for someone to make this work optimally? </p><p>I followed the instructions but am only getting extremely intermittent transmissions on the control frequency for my county public service trunk control. I've tried the alternates no difference with those as opposed to the primary control frequency. I'm only using the antenna that came with my usb software radio so I figure that this is woefully inadequate.</p>
<p>I'm having the same issues.Got everything working but many conversations are choppy. One thing that helped my reception was to put the antenna on a metal surface. I used an old cookie sheet and it seems to help considerably. I have a friend who is Ham Op and will ask about antenna choices. Something small that I can keep in the house rather than mounting on the roof.</p>
<p>I have a 2 dongle setup and all appears to be working fine except I have no sound what so ever. Am I missing something everything is configured as to the article, in sound properties record is set to line 1 vac and in playback it is set to speakers. </p>
<p>My local police/fire does not use trunking, What steps can I elimate just to receive digital non-encrypted traffic?/</p><p>Thanks,..</p>
Need help please! In step 17, I can tune to a few different good control signals. However, I am not getting any new windows to pop up! Ideas? Thank you!
Need help. Got stuck on step 17(sptep SDRSharp trunk radio guide). Unitrunker does not display the &quot;site&quot; window as described int the step. I have followed both guides to the letter, but no luck.
Yes, it controls. But jumps very fast between voice chanels, so I hear nothing. How to tune it to one ID or group?
tryed, still no control from UniTrunker (
I prefer the VB-Audio Virtual Cable instead. Very simple and it's donationware: http://vb-audio.pagesperso-orange.fr/Cable/index.htm <br>
I will have to check that out! I searched high and low for a free alternative to VAC and came up empty handed...
Hi, Harrison! I have one dongle and set it all as described in your article (single tuner configuration). But all that SDRSharp listens just control channel, and doesn't jump to the voice frequencies, in spite of the UniTrunker lists all of the target ID's in this time (look at the screen). I'm novice in this, what do I wrong?
You seem to be really close to getting everything to work! <br> <br>I would first suggest setting the filter bandwidth to 12500. And also taking a look again at the section that talks about calibrating the tuner, you can see the red line in your screenshot is a bit to the left of the signal. If you take care of those issues the signal quality in UniTrunker should improve. <br> <br>Also, the Minimum Signal Level (in the screenshot you sent me) should be set to something around -30 or -35. The goal is to set the number to a level above the noise floor but not too high so that it will ignore a signal. My guess is that this is what&rsquo;s keeping SDR# from changing the frequency&hellip; Keep in mind if you adjust your gain settings this value will need to be changed again.
This is what I have so far. The first picture is the SDR program along with the DSD and Unitrunker. The second picture is the Unitrunker Installation directory. I can't seem to get Unitrunker to control SDR so I was wondering if I did anything wrong.
the same problem (
Thanks for pulling this together, very helpful. Quick question - With 1 RTL-SDR should I expect to actually hear anything, or just see it decode with DSD? Seems everything revolves around the VAC. Audio output of SDR# needs to be the VAC, U-Trunker uses that as the input (so does DSD I think).What gets the decoded sound out of the computer speakers? Hoping its just a setup issue I have.
You are correct, UniTrunker and DSD will use the same input that comes from SDRSharp. You direct the sound out of SDRSharp into the line 1 device, and set up DSD and UniTrunker to listen to line 1. When tuned to the control channel Unitrunker will decode tuning information, and when tuned to a voice stream, DSD will decode the voice information. You should absolutely be able to hear sound out of DSD. Double check and make sure that Line1 is set as the &quot;Default Recording Device&quot; in windows sound properties and that Unitrunker is set to listen to Line1. Go back over the final steps in the guide and make sure you didn't miss anything. Hope this helps!
I don't see the Trunking tab in SDR#?
Small calculator icon? <br> <br>I found mpt1327, i see the call, joins but frecuency its 0.0000. any ideas? <br>perhaps its encrypter? how i known if its encrypt?
Great article. You re-kindled my interest in SDR. I bought a couple during the craze and never really did much more than listen to the radio. This has been a fun re-awakening. I am having troubles finding the correct frequency. I've tried looking up the Illinois State Police trunk on radioreference.com but can't seem to get anything out of it. Maybe a new antenna? Thanks again for this!
Thanks! I just used the antenna my receiver came with, pictured above. On the system in my example there were a bunch of control channels but I could only actually receive one or two. I think they are only a few miles away. Upgrading the antenna might be an option to look into. But before you spend money, see if your county has a trunked system, you probably have better chances at being close to one of those. Also do you see consistent streams in SDRSharp, but just have no luck getting UniTrunker to pick it up? That could point to a configuration issue.
I was able to tune into a local trunk and UniTrunker was able to see it. So that's good. I've attached a picture of it so you can see what I'm getting. <br> <br>How did you pick the frequency for the police trunk? I guess I'm not entirely sure I'm tuning to the correct freq.
You're actually closer to getting it working than you think! The green bars in the top left of the UniTrunker window means that you are successfully connected to the control channel and your antenna should be okay! By looking at the 8D01 in the UniTrunker window I can see you're tuned to this system here:<br> <br> http://www.radioreference.com/apps/db/?action=sysid&amp;sysid=8d01<br> <br> I dont think that is a police system. For Illinois I would try looking here and finding the control channels listed in your county or nearby counties:<br> <br> http://www.radioreference.com/apps/db/?sid=2324<br> <br> Also, you are using a newer version of SDRSharp that doesn't (yet) have a compatible trunking plugin. I have a download link under the Software section to the version you need. Then take a look at the end of the tutorial that shows how to configure the plugin.<br> <br> https://www.instructables.com/id/How-to-Make-a-19-Police-Radio-Scanner/step20/Setup-UniTrunker-to-control-SDRSharp/<br> <br> Hope this helps!

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