Pothos LimeSDR source setting for clocking source rolls down only one option: “Default”. What does one enter to switch the board to an external reference? I am running on Ubuntu.
Hi, @Pinut, it’s possible that Pothos drivers do not expose the ADF4002 phase modulator. In that case, you need to switch the clock reference source before running your application.
The script performs the action you’d execute In the LimeSuiteGUI. You enable use of an external reference clock by connecting to the board, and choosing **Modules -> ADF4002 **
You then enter the frequency of your external clock source in Fref, MHz, and click Calculate R, N & Upload.
Assuming your external clock is connected (via onboard uFL connector J14), you should see a fourth LED on the board light up green.