Issue with LimeSDR Mini

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Akib Sayyed akibsayyed at gmail.com
Fri Jun 4 14:53:27 UTC 2021


I think problem is not with clock

Cause i tuned to tx freq i see no signal

But when i comment ramp code from osmobts i do get signal.

On Fri, 4 Jun 2021, 8:14 pm Andrew Back, <andrew at carrierdetect.com> wrote:

> On 04/06/2021 15:02, Joachim Steiger wrote:
> > hi
> >
> > limesdr mini does not have a onboard-clock which is good (precise)
> > enough for gsm requirements.
> > there is no input which can easily be used with an external source like
> > a gpsdo.
> > thus there is no realistic way to reliably do gsm with the -mini, sorry.
>
> External clock can be enabled with LimeSDR Mini, but requires moving
> (soldering) a 0R link and then you always have to use external clock.
> Daniel Estevez put together a nice write-up:
>
>
> https://destevez.net/2019/11/using-an-external-reference-with-the-limesdr-mini/
>
> Supreeth Herle has also created an LMS API port of Kalibrate, that can
> be used to calculate and update VCTCXO DAC value in EEPROM:
>
> https://github.com/myriadrf/kalibrate-lms
>
> This is obviously not as good as having a GPSDO or similar, but may help.
>
> Andrew
>
>
>
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