Hi Everyone First, I would like to introduce myself (ourselves) : VeriSat, Oslo based company (Norway). We are working on a project, using USRP (N210) platform, which aim is to build a DVB-RCS Terminal Shortly RCS is for satellite communication, and is Multi Frequencies TDMA. (http://verisat.no)
So synchronization is an important issue for us. Now I have a question regarding the use of a USRP N210 with GPSDO kit, and the use of the UHD function ptime get_time(void) in /host/lib/usrp/gps_ctrl.cpp @ line 133 According to the implementation of get_time(void), it returns the date time with precision down to second. It looks like it queries the USRP waiting for a reply starting with "$GPRMC". then is parses the reply to extract year, month, day, hours, min and sec. Is it possible to extract from the reply the milli ? micro ? and nano seconds ? For example using toked[2-8] or toked[10-11] (because UHD_ASSERT_THROW(toked.size() == 12);) If not, is there any way to include more precision in get_time() by changing code not only in gps_ctrl.cpp, but also in the firmware ? According to http://lists.gnu.org/archive/html/discuss-gnuradio/2011-02/msg00162.html USRP should get 50 ns precision, so I assume it's possible in some way ? Best Regards Bastien _______________________________________________ Discuss-gnuradio mailing list [email protected] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
