Support for LimeSDR?

I am thinking of upgrading my UHF station (#702) from an RTLSDR to a LimeSDR.
I don’t see a setting for it in the satnogs client, are they supported via some other type?
Station 702 is running on a ACER computer, not a Pi, so I have the CPU power to support the LimeSDR.

hey @thebaldgeek !

LimeSDR support is coming on the next version of gr-satnogs (through usage of gr-soapy) which we are currently testing. As a matter of fact Station 977 is currently running on LimeSDR-Mini with pretty good results (although we still are ironing out the details).

We will be making an announcement when the new version is ready for all people to easily upgrade. In the meantime if you want to help us testing, be sure to drop by #satnogs-dev channel and ask for details on how to test.

Cheers!

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Thanks for the reply.
I will get one ordered and be ready to either help out or wait for the release.

Cheers.

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Out of curiosity, what do you wish to upgrade? Receiver performance, frequency range, bandwidth, or transmit support?

Receiver performance. I am just looking to tweak the station the best I can for a fixed antenna.
I think the LimeSDR Mini will be the last upgrade I can do to the station.

In a few weeks we will have an independent report with receiver measurements for:

  • RTL-SDR V3
  • Airspy Mini
  • SDRplay RSP duo
  • LimeSDR Mini
  • BladeRF 2.0 micro
  • Ettus USRP B210
  • PlutoSDR

We have measured:

  • Noise figure (aka. sensitivity)
  • Dynamic range (reciprocal mixing, blocking, SFDR – whichever occurs first) at various separations)
  • Spectral purity (internal spurs)

for all satcom frequencies (except 1.6 GHz) and all gain settings.
Although our methods are relatively simple and not necessarily 100% “clinically clean lab tests”, they will provide a good basis for making side-by-side comparisons between the different devices.

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Any teasers? I’m amazed how well a $20 RTL-SDR V3 works… but I’ve never owned any others. Should be a good read.

Wow! That sounds fantastic! Looking forward to reading about this a great deal! (And secretly hope that the Lime does Ok since I just bought it about an hour ago once I knew support for it was coming soon):slight_smile: .

Indeed, one of the big surprises was the performance of the RTL-SDR V3 dongle:

  • Noise figure at highest gain around 6 dB (the Airspy Mini is not better)
  • Dynamic range around 70 dB

The dynamic range measurements are still to be cross-checked (for the third time) because they are hard to believe. One of the cross-checks we have done was to inject a -75 dBm signal while listening to a weak beacon. As you can see on the screenshots below, the strong signal does not cause any degradation of the SNR of the beacon. At max gain, the measured MDS was -142 dBm, so the dynamic range in this setup is -75 dBm - (-142) dBm = 67 dB, which is unexpected for an 8-bit dongle :smiley:

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Sorry for going off topic, but where do I find this channel?

https://riot.im/app/#/room/#satnogs-dev:matrix.org

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or in freenode irc server at #satnogs-dev

Check more at “Get In Touch” wiki page

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Good news, like to try on LimeNET Micro when available…
So far managed to run Soapy Remote and CubicSDR is running,
SDRAngel can see devices through network but crash on selection & start of sampling.

Net Micro RX path is more less useless on HF - can not handle even 10,7 MHz IF from PCR 1000
without LNA4HF.

Now using one SDRPlay RSP1 for HF and Net Micro for 110 MHz and up.

Therefore like to try with Satnogs to see can be usefull up there. Limit may be CM3 module
max size of 8 GB