Different results with GNURadio and qspectrumanalyzer (limesdr mini)

[jeremy]

Hi,

I am a new limesdr mini user, and I am trying it out by observing some LoRa signals. When using Gnuradio, I can see the packets in the Qt waterfall diagram (I have my device transmitting at 5 sec intervals and the blips show up every 5 seconds).

However, when using qspectrumanalyzer, I can’t see the signal appear at all. I’m not really sure why this is, could someone please help me understand why?

I can’t use GQRX because it doesn’t seem to work so far.

I’m using Ubuntu 18.04, with the various tools installed to their latest versions today.

Thanks,
Jeremy

[en1gma]

what is your “settings” in qsa

[jeremy]

Hi en1gma,

Please see attached. I have also added a screenshot of the full spectrum; the DC removal option appears to either do nothing, or is very poor (maybe my calibration is bad?). The DC removal block in gnuradio however works quite well though.