The LimeSDR has several antennas (txrf1_a, txrf2_a, txrf1_b, txrf2_b, rxrf1_h, rxrf1_l, rxrf1_w, rxrf2_h, rxrf2_l, rxrf2_w), how to know which one to use, in osmotrx for example?
How to use the clock antenna? Does a GPS module exist?
LimeSDR is powered by the USB port, what is the port used for?
Thanks for your help.