The multi usrp wrapper has a method built in to synchronize a collection of devices when the PPS edge event is unknown to the computer. You may want to use the multi_usrp, and in any case, see the comments on synchronization here: http://www.ettus.com/uhd_docs/doxygen/html/classuhd_1_1usrp_1_1multi__usrp.html#a413014bf3aea4a8ea2d268b4a3b390e9
On 01/19/2011 09:29 PM, Sangho Oh wrote: > I am trying to achieve two synchronized transmissions from two USRP2s. > Both USRPs are connected to each host PC and feed with 5PPS clocks, without > 10Mhz reference clock. > But I cannot make it happen yet. > no common reference means clock drift > > However, the two transmissions are not synchronized well. There is a > significant timing offset between the two transmissions, which > is hundreds of milliseconds. > perhaps a multiple of 200 ms, which is the period of your pulses. -josh _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
