hi,everyone: as i am new to RF pcb layout , i want the USRP daughter
board PCB file to reference,i found a floder at
“/root/usrp-hw”(http://gnuradio.org/redmine/projects/gnuradio/repository/revisions/8c8eeca9e2ae26c30f186bef23411d345acbc3f6/show/usrp-hw)
but i found some of those pcb files are created by gEDA(like
tvrf.pcb).but others like rfx900.pcb,i wonder they are created by which
tool?
as i tried,they are not created by those tools: altium
designer/protel/gEDA/powerPCB.
plz help me if you know how to open them,thank you.
nail.