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pothosware / SoapySDR

Vendor and platform neutral SDR support library.
https://github.com/pothosware/SoapySDR/wiki
Boost Software License 1.0
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OpenLTE with soapyUHD #205

Closed Dastgsm closed 5 years ago

Dastgsm commented 5 years ago

I'm trying openlte with soapyUHD and i have this error! UHD Error: Tx Calibration: MCU error 5 (Loopback signal weak: not connected/insufficient gain?) – Rx calibration finished UHD Warning: popping from TX, samples popped 540/1020.

any idea to fix it ?

Dastgsm commented 5 years ago

Note that i use limesdrmini.

guruofquality commented 5 years ago

LimeSDR uses the current gain settings an internal loopback path to run self calibrations, your best bet is to raise the gain. In any case, it shouldnt stop your application from working, its just that IQ balance or DC offset might be worse.

Dastgsm commented 5 years ago

so it's hardware problem (antenna with gain or using LNA)! i use also homemade antenna and i'm waiting a good antenne for doing this!

Dastgsm commented 5 years ago

so to have best IQ balance or DC , the Tx send calibration to the Rx and SoapySDR try to see how to have a best synchronisation with ?

guruofquality commented 5 years ago

The LimeSDR calls calibration when the stream is activated: https://github.com/myriadrf/LimeSuite/blob/master/SoapyLMS7/Streaming.cpp#L203

If you think something is wrong or you have a support question, you need to ask the maintainers: