There seem to be many threads talking about LimeSDR H/W problems or how their LimeSDR has stopped working.
Are these problems due to LimeSDR design / manufacturing ?
Are they due to the fact that the users have not adhered to absolute maximum ratings / electrical limits (i.e. w.r.t. power supply voltage, coupling amplifiers to output stage without proper matching etc.) ?
Is there any document/link that lists important dos and don’t to not damage the board ?
For LimeSDR USB, is an external power supply required ? If yes, what should be its ratings ?
Also, with USB connected & external power supply connected, does the board automatically stop drawing power from USB if the external power supply can provide the necessary current ?