I have got a LimeSDR Mini and having trouble with receiving and transmitting signals. I have been focusing on the receiver for now.
This is what I have done:
- Ran the LimeQuickTest utility and everything passed including loopback test.
- Set the frequency in SXR to my local radio station that I want to listen to, pressed calculate, tune and then in the calibration screen, calibrated the RX. Message said calibration successful, then pressed GUI->Chip.
- Installed all the libraries/dependencies that I could find like Boost, SWIG, Built the gr-limesdr.
In GNU-Radio if I use a QT GUI sink and set a center frequency of say 100MHz then it will always show a spike at 100MHz, it does not matter what frequency or whatever is around it will always spike at the defined center frequency regardless of if that signal is present or not.
I used a device that transmits at 433MHz and watched the spectrum at 433MHz on the LimeSuiteGUI/FFTviewer and GNU-Radio/QT GUI sink. There was no change in the spectrum, just a constant spike at 433MHz.
I tried to use the FM Receiver example from gr-limesdr and all I hear is static. I set the sample size to 44.1KHz on the audio sink and adjusted the Rational Resampler and WBFM receiver accordingly based on another answer I saw on these forums but this did not help. I have tried LimeSDR Source sample rates of 2M, 5M and 10M but it makes no difference. I have also tried osmocom sinks and sources with no luck.
SoapySDRUtil --Find and LimeUtil --Find return identical results and tell me that my device is a LimeSDR Mini and the serial number.
I am a newbie to SDR in general so I am likely missing something, any pointers would be helpful? Thank you.