I am having trouble getting two USRP's synchronized using the multiple USRP setup described at
http://www.gnuradio.org/trac/wiki/MultiUsrp and
http://www.gnuradio.org/trac/wiki/USRPClockingNotes. I am able to open/get data from both USRP's independently, and have even crafted a program to setup simultaneous flowgraphs collecting data from both and feeding them into BBN's 80211b demodulator. However, I would like to be able to synchronize the clock on both USRP's (I'm interested in looking at TDOA between packets). I have not had any luck getting the multi_usrp_oscope.py program displaying any data - and my attempts at using usrp_multi.multi_source_align as a source in e.g. the usrp_fft program have not been successful. Are there any suggestions on where I should be looking to debug this? I am using the multi_2rxhb_2tx.rbf fpga code, and using gnuradio-3.1.2 on a laptop running ubuntu hardy heron.
Any help/tips would be appreciated,
Doug
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Doug Geiger
address@hidden