You have both USB cables plugged in right?
@wb8lbz_Larry Larry & @moles , stick with us. We have some of the best folks in the business trying to solve the issue weāre facing. Stay tuned to this thread. Iāll consolidate all replies here.
Best, Dave W7BOT, Seattle
No, just the one. I draw to your attention that all my Quick Tests from https://wiki.myriadrf.org/LimeSDR-USB_Quick_Test worked fine. So I donāt see how this could help?
@Roman Thanks. Requested your source for Pothos so that I can try. Please send to limesdr at flightsystems.biz
Hi Dave,
Iāve made a slight bit of progress. It seems that my problem is in gqrx or itās underlying libraries.
As I mentioned before I canāt get gqrx to show anything but noise basically.
However, using LimeSuiteGUI Iāve been able to see a couple of local FM stations.
Iām not sure we have exactly the same problem but you can try what I did:
- Download the example.ini from https://wiki.myriadrf.org/LimeSDR-USB_Quick_Test
- Connect to device using āOptionsā->āConnection settingsā
- Press āOpenā and find the āexample.iniā file.
- Under the āSXRā tab, change the frequency at the top left to something near your FM station and press āCalculateā.
- Open the FFT under āModulesā->āFFT Viewerā.
- Press start and check the FFT spectrum.
Note that I need to connect an antenna (to RX1_L) to get signals over the noise floor.
But just connecting a piece of SMA cable is sufficient to see local stations if I raise the number of FFT averages a bit.
So it seems like the gqrx packages supplied in the snap store are currently broken, as in data is collected from the card but the signal chain is not properly setup. This is too bad since that is the only variant of gqrx Iāve been able to make connect to the LimeSDR.
Hey bud,
I did all the initial quick tests, including RX test, and thatās when I started suspecting problems. On my RX test (following exactly the steps you describe), I was seeing basically a flat line noise floor. Couple of spikes here and there, but nothing that resembled FM broadcast. I also tried to tune in on my WiFi AP in the 2.4G range ā¦ nothing. Thatās when I started trying a few of the apps like GQRX and SDR-Console.
Basically, 22 hours later, Iām now convinced I have a dead Lime ( or lemon 
) Iāve asked @andrewback Andy @ LimeMicro how I can get a replacement.
I have a real bad taste in my mouth right about now 
Glad youāre at least making some progress.
@moles By the way, I never found a way to get audio from LimeSuite. Did you? While you were trying your tuning tests?
The new user status and limits should expire after 24 hours. Sorry about that, but itās just a spam mitigation measure in case of bot generated accounts.
Pinged @zack to see if he has anything else to suggest and if it does look like you have a faulty board, Iāll put you in touch with Crowd Supply and weāll arrange for it to be swapped out. Weāll get this sorted one way or another.
Also, a big thanks to everyone who has been helping out with debugging! 
Thanks Andy. @Zack, there are a number of screenshots of my results and comparison with other users over at LimeSDR under SDR-Console. Thanks in advance.
Dave - Pour yourself a cup of coffee and start reading this thread -----> Happy days are here again - LimeSDR lives in HF!
Itās what started the prairie fire on HF receive once it was fixedā¦youāll see A LOT of comparisons there over HF to UHF.
73 de Marty, KN0CK
Hey bud,
Pour myself a cup of coffee?? Holy bazooka ā¦ Iāve got the stuff coming out of my ears. Iāve been living on coffee alone for the past 24 hours as I battled with trying different things to see if my Lime REALLY is dead. I just watched your Foo2000 video, and am going to try that out now to see if that works.
Yeah, already read that whole thread end-to-end. Frankly, like most, Iām a bit disappointed with the unexpected HF underperformance, but hey ā¦ Limeās great for everything else, right? Iām still toying with the idea of spending the kidās inheritance and splashing out on a Hermes. Then Iāll have the best of both worlds. Donāt tell my wife tho.
It kills me to see the screenshots of other users. I just KNOW how much fun theyāre having right now. And Iām sitting here staring at a deaf box. At least the LEDs work. Pretty entertaining light show ā¦ once you stare at them blankly long enough
Anyway, one of my first projects when I get a working Lime is to build a pan-adaptor for my IC-7100. Iād just love to see the spectrum before calling CQ. Sounds like a cool 1st project to cut my teeth on. Iām busy learning Pothos as we speak.
Take care. Catch you on āLime for SDR-Consoleā again soon. Thatās another project I want to become more involved in. I love that @SimonG4ELI Simon is building in the satellite module. Thatās where my true passion lies. Iāve had numerous contacts with the ISS (and even MIR back in the day) and have worked many of the birds out there today. I want to make it WOB (worked ALL birds?) and Lime is a very big part of that goal. Especially for the 23cm birds.
This might not be part of it ā¦
with Ubuntu gqrx ā¦
try switching from wide FM to narrow and back a few times ā¦
I tinkered quite a bit at first with mine. Still learning how the gain parameters operate. I found using the Extio with HDSDR to be fantastic as a receiver. Definitely try different antennas and also try moving the antenna around if you can.
Hi @W7BOT,
You mentioned that you performed steps 4.1 to 4.5 from Quick Test. My question is - do you see a signal i FFT Viewer when performing step 4.6?
Hi Zach @Zack
As you requested, I have re-run test 4.6. Screenshot below.
Step 4.1 - I connected to the board successfully
Step 4.2 - Loaded example.ini successfully
Step 4.3 - Set mu freq to 106.500 on SXR tab. this is the freq I have been using as a benchmark for my testing (strong FM broadcast stn in my area)
Step 4.4 - Set 80 MHz CLK_H ā¦ results in 10 MHz sample rate (10 MHz RF bandwidth).
Step 4.5 - hereās the screenshot of the station. NOTE this stn comes in as S9+ on my little scanner with a 4 inch rubber duck antenna. The screen you see is with a 30-1300mHz discone at 40 feet high connected to RX1_L. The signal on Lime IS WAAAY LOW.
Step 4.6 - I ran the ātest signalā as you requested. Hereās what I get.
Best, Dave W7BOT
Hey Dean, thanks for reaching out. HDSDR is something I know a little about. Itās the RX side of the Hermes, correct? But whatās the Extio you mention?
Yes, Iāve tried different antennas. First, I started with the little 2.4gHz sticks that came with the Lime (I ordered them on Crowd Supply with the original order + acrylic case). They donāt receive anything.
Then I went to a 12 inch whip which I use on my VHF HT (handi-talkie). Very little difference.
Finally I connected to my 30-1300mHz discone atop a 40ft mast out in the open. Only now am I able to hear āsomethingā. But itās bad. Hardly audible. And thatās comparing to my HT that receives the same signal on 106.500 indoors PERFECTLY with itās rubber duckie antenna.
Looking fwd to yr Extio answer ā¦ Iām intruiged
73 de Dave W7BOT
A direct link to the Extio is here: https://jiangwei.org/download/ExtIO_LimeSDR.zip
The developer posted information along with source code link here: EXTIO.DLL support
I have my LimeSDR installed in a metal enclosure with the 10 Antenna/SMA antenna connectors through one of the face plates of the enclosure. I find that I get poor reception when an antenna is mounted directly to one of the SMA connectors. Using a cable and mounting the antenna a few feet away makes a world of difference for me. My biggest problem as of now is images. I seem to get more of them with the Lime than I do with other SDR receivers I have. Iāll have to invest in a few additional filters.
Good man. Thanks Going to play now !!!