[SOLVED!] Read(64 bytes) failed TuneVCO(CGEN) - failed to lock (cmphl!=0)

Projects LimeSDR
1

I was cursed by the dreadful selftest failure as well (quoted below), but it was quite simple to solve:

I had the USB3 cable and the “power” cable both connected to the PC front panel (2x USB-A 3.0). As soon as I unplugged the barrel connector (i.e. powering the LimeSDR-USB from the USB 3.0 cable alone), the errors vanished!

[ RF Loopback Test ]
Note: The test should be run without anything connected to RF ports
->Configure LMS
Read(64 bytes) failed
Read(64 bytes) failed
Read(64 bytes) failed
Read(64 bytes) failed
TuneVCO(CGEN) - failed to lock (cmphl!=0)
SetFrequencyCGEN(80 MHz) failed
TuneVCO(CGEN) - failed to lock (cmphl!=0)
SetFrequencyCGEN(491.52 MHz) failed
Failed to set sample rate
->RF Loopback Test FAILED
2

Too high of a voltage? I blew the power switch chip. No more than 8VDC max in my opinion.

Ed