According to “LimeSDR-Mini v1.2 hardware description”, section 4.6 on clock distribution, to enable external reference clock: “VCTCXO can be disconnected from clock buffer input (remove R59 and solder R62) and external reference clock can be supplied from connector J8 (REF_CLK_IN).”
However, there doesn’t appear to be an unsoldered R62. Does anyone else see where an unsoldered R62 is located? The silkscreen label is in the middle, underneath the FPGA and without any nearby pads. Also, have I located the correct location of R59? I don’t see board design files for LimeSDR mini 1.2 (only LimeSDR mini 1.1).